Intelligent Oscillation Controller - Revision history

BrettPihl: /* Circuitry */

2008-03-20T23:57:03Z

Circuitry

← Older revision		Revision as of 18:57, 20 March 2008
Line 45:		Line 45:
	The main elements of the circuit were a PIC, DAC ([http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. An optional component is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). The 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. An optional component is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). The 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation. Learn more about external memory and EEPROM's [http://hades.mech.northwestern.edu/wiki/index.php/Interfacing_to_External_EEPROM here].

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

BrettPihl: /* Circuitry */

2008-03-20T23:55:37Z

Circuitry

← Older revision		Revision as of 18:55, 20 March 2008
Line 49:		Line 49:
	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

	We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here].		We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers [http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here].

	Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convenient. You can read more about this cable and the alternative option [http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]. To learn more about serial communication between a PC and PIC, see [http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page].		Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convenient. You can read more about this cable and the alternative option [http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]. To learn more about serial communication between a PC and PIC, see [http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page].

BrettPihl: /* Circuitry */

2008-03-20T23:55:11Z

Circuitry

← Older revision		Revision as of 18:55, 20 March 2008
Line 45:		Line 45:
	The main elements of the circuit were a PIC, DAC ([http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. ~~Included~~ ~~this~~ ~~diagram~~ is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). ~~This is an optional component in the circuit, the~~ 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. An optional component is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). The 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

BrettPihl: /* Circuitry */

2008-03-20T23:52:07Z

Circuitry

← Older revision		Revision as of 18:52, 20 March 2008
Line 54:		Line 54:


	[[Image:~~smlearningoscillationcircuit~~ \|900px\|Left\| Circuit Diagram]]		[[Image:learnoscnoeeprom \|900px\|Left\| Circuit Diagram]]

	<br clear=all>		<br clear=all>

BrettPihl: /* References */

2008-03-20T23:24:55Z

References

← Older revision		Revision as of 18:24, 20 March 2008
Line 136:		Line 136:
	* [http://lims.mech.northwestern.edu/~lynch/ Professor Kevin Lynch]		* [http://lims.mech.northwestern.edu/~lynch/ Professor Kevin Lynch]
	* [http://lims.mech.northwestern.edu/students/vose/ Tom Vose], author of the learning algorithm used in this project		* [http://lims.mech.northwestern.edu/students/vose/ Tom Vose], author of the learning algorithm used in this project
			* [http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital to Analog Conversion]
			* [http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf EEPROM Chip]
			* [http://www.emtel.com/product-p/61-emv15012v.htm Emtel Power Supply]
			* [http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers Accelerometers]

BrettPihl: /* Circuitry */

2008-03-20T23:20:18Z

Circuitry

← Older revision		Revision as of 18:20, 20 March 2008
Line 37:		Line 37:


	[[Image:poweradapter \|thumb\|150px\|right\| Power ~~Adaptor~~ Wiring]]		[[Image:poweradapter \|thumb\|150px\|right\| Power Supply Wiring]]

	[[Image:ampinput \|thumb\|150px\|right\| Amplifier Input]]		[[Image:ampinput \|thumb\|150px\|right\| Amplifier Input]]
Line 51:		Line 51:
	We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here].		We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here].

	Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more ~~convienient~~. You can read more about this cable and the alternative option [http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]. To learn more about serial communication between a PC and PIC, see [http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page].		Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convenient. You can read more about this cable and the alternative option [http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]. To learn more about serial communication between a PC and PIC, see [http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page].

BrettPihl: /* Circuitry */

2008-03-20T23:19:18Z

Circuitry

← Older revision		Revision as of 18:19, 20 March 2008
Line 43:		Line 43:
	[[Image:ampoutput \|thumb\|150px\|right\| Amplifier Output and Power]]		[[Image:ampoutput \|thumb\|150px\|right\| Amplifier Output and Power]]

	The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([[http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

	We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers([[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here]]).		We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here].

	Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convienient. You can read more about this cable and the alternative option ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]]). To learn more about serial communication between a PC and PIC, see ([[http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page]]).		Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convienient. You can read more about this cable and the alternative option [http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]. To learn more about serial communication between a PC and PIC, see [http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page].

BrettPihl: /* Circuitry */

2008-03-20T23:18:20Z

Circuitry

← Older revision		Revision as of 18:18, 20 March 2008
Line 45:		Line 45:
	The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([[http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([[http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([[http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

BrettPihl: /* Circuitry */

2008-03-20T23:17:41Z

Circuitry

← Older revision		Revision as of 18:17, 20 March 2008
Line 43:		Line 43:
	[[Image:ampoutput \|thumb\|150px\|right\| Amplifier Output and Power]]		[[Image:ampoutput \|thumb\|150px\|right\| Amplifier Output and Power]]

	The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to ~~Matlab~~. ~~Matlab~~ would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to MATLAB. MATLAB would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([[http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([[http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply (http://www.emtel.com/product-p/61-emv15012v.htm). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply ([[http://www.emtel.com/product-p/61-emv15012v.htm Emtel EMV15012v]]). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.

	We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers ~~here:~~ http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers.		We used a surface mount LIS2L02AS4 accelerometer. We set pins 9, 11, and 13 LOW to give us a 2g resolution. These chips read acceleration in 2 dimensions, we used the X-direction (pin 10) read by pin 02/RC0 on the PIC. You can read more about accelerometers([[http://hades.mech.northwestern.edu/wiki/index.php/Accelerometers here]]).

	Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convienient. You can read more about this cable and the alternative option ~~here:~~ http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232. To learn more about serial communication between a PC and PIC, see ~~this page:~~ http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab.		Serial communication between the PIC and MATLAB was accomplished by using a FTDIChip TTL-232R USB to RS232 Cable. It is a bit more expensive then using a leveler chip and a DB-9 connector, but much more convienient. You can read more about this cable and the alternative option ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC_RS232 here]]). To learn more about serial communication between a PC and PIC, see ([[http://hades.mech.northwestern.edu/wiki/index.php/Serial_communication_with_Matlab this page]]).

BrettPihl: /* Circuitry */

2008-03-20T23:14:46Z

Circuitry

← Older revision		Revision as of 18:14, 20 March 2008
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	The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to Matlab. Matlab would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.		The main elements of the circuit were a PIC, DAC ([[http://hades.mech.northwestern.edu/wiki/index.php/PIC18F4520:_Serial_Digital-to-Analog_Conversion Digital-to-Analog converter]]) and accelerometer. The PIC would store a discretized sine waveform with integer values from 0-255. It would then output a function of this sine wave (our control signal) to the DAC. The analog signal output from the DAC would be sent to the amplifier, which would then power the speaker. The accelerometer on the mass would feedback the actual acceleration profile of the mass back to Matlab. Matlab would then recompute the next control signal and repeat the cycle until the mass was moving with the desired acceleration profile.

	Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip (http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.		Our circuit diagram is shown below. Included this diagram is a 24FC515 EEPROM chip ([[http://ww1.microchip.com/downloads/en/devicedoc/21673E.pdf 24FC515 Data Sheet]]). This is an optional component in the circuit, the 512 KB of memory could be used to store data to later be retrieved and processed by MATLAB. We found this to be unnecessary in our experimentation.

	The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply (http://www.emtel.com/product-p/61-emv15012v.htm). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.		The speaker car amplifier must be powered by a 12 volt DC source, to accomplish this we used an Emtel EMV15012v power supply (http://www.emtel.com/product-p/61-emv15012v.htm). A picture of the wiring terminals is shown in a figure at the right. When powering your amplifier, the "REMOTE" terminal must be powered high with 12 V for the amplifier to remain on. We included a switch here to be able to power on our amplifier separately from the power supply. Using the left low impedance input on the amplifier means the output will be on the CH1/L terminals. Using the low impedance inputs also requires an RCA cable. We had to cut this cable in half and strip the insulation coating in order to access the positive and negative terminals of the RCA jack. The outside ring is negative, and the inside hole is positive. A picture of the amplifier input is shown to the right.