Difference between revisions of "Practice Making a PCB"
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This page contains a practice assignment for making a schematic and a pcb. Refer to the [[PCB_Artist]] tutorial for information on how to finish it. |
This page contains a practice assignment for making a schematic and a pcb. Refer to the [[PCB_Artist]] tutorial for information on how to finish it. |
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We are going to make a leaky integrator schematic and pcb. You can read about leaky integrators [[Operational Amplifiers (Op-Amps)|here]] in the integrator section. This circuit will consist of 2 resistors, 1 capacitor and an op-amp (such as LT1001CN8). |
We are going to make a leaky integrator schematic and pcb. You can read about leaky integrators [[Operational Amplifiers (Op-Amps)#Integrator|here]] in the integrator section. This circuit will consist of 2 resistors, 1 capacitor and an op-amp (such as LT1001CN8). |
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== Make the Schematic == |
== Make the Schematic == |
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We are going to make the following schematic. |
We are going to make the following schematic. |
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[[Image:ME333_Lab2_schematic.jpg]] |
[[Image:ME333_Lab2_schematic.jpg]] |
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<br clear=all> |
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You already have the resistor and capacitor components, but the op-amp component does not exist yet. |
You already have the resistor and capacitor components, but the op-amp component does not exist yet. |
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Search for a datasheet of the LT1001CN8 precision operational amplifier. (You can search on google, digikey...etc). |
Search for a datasheet of the LT1001CN8 precision operational amplifier. (You can search on google, digikey...etc). |
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To create the |
To create the schematic symbol, you can either draw your own schematic for the 8pin op-amp as shown above OR you can find the existing schematic symbol under one of the existing libraries (hint op-amps are integrated circuits(IC)). If you make your own, make sure you have 8 pins. |
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You will have to make the pcb footprint for this op-amp using the tools from the tutorial. |
You will have to make the pcb footprint for this op-amp using the tools from the tutorial. |
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Create a component |
Create a component and name the pins as shown in this schematic (ie IN-,IN+,etc) |
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You will need to add extra text for Vin and Vout. |
You will need to add extra text for Vin and Vout. |
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== Make the PCB == |
== Make the PCB == |
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Now we will make the PCB of this circuit. |
Now we will make the PCB of this circuit. |
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To be sure we are on the same page, download the complete schematic [[Media:ME333_lab2_complete_schematic.sch] and incomplete PCB [[Media:ME333_lab2_incomplete_pcb.sch]. |
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The finished board should look like this: |
The finished board should look like this: |
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[[Image:complete_me333_pcb.jpg]] |
[[Image:complete_me333_pcb.jpg]] |
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Use 'Translate to PCB' as in the tutorial to convert your schematic into a pcb. |
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But it is missing some components? and traces? |
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Fill them in. |
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In the PCB configuration |
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*Create a 2x2 in pre-defined board |
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*Basic 2 Layer Standard |
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*Default Layers and Board Parameters |
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*Special Requirement - Student |
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*Name your board with a 1 week turn around time and quantity of 1. |
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On your board, make sure you: |
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*Add 5 extra pins for Vin, Vout, V+, V- and GND |
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*Add silkscreen text for these 5 extra pins |
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*Change the trace size between GND and the op-amp to have a width of 0.05 |
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*5 vias as shown above |
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*1 mitered track as shown above |
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Latest revision as of 07:44, 10 January 2010
Practice Making a PCB
This page contains a practice assignment for making a schematic and a pcb. Refer to the PCB_Artist tutorial for information on how to finish it.
We are going to make a leaky integrator schematic and pcb. You can read about leaky integrators here in the integrator section. This circuit will consist of 2 resistors, 1 capacitor and an op-amp (such as LT1001CN8).
Make the Schematic
We are going to make the following schematic.
You already have the resistor and capacitor components, but the op-amp component does not exist yet.
Search for a datasheet of the LT1001CN8 precision operational amplifier. (You can search on google, digikey...etc).
To create the schematic symbol, you can either draw your own schematic for the 8pin op-amp as shown above OR you can find the existing schematic symbol under one of the existing libraries (hint op-amps are integrated circuits(IC)). If you make your own, make sure you have 8 pins.
You will have to make the pcb footprint for this op-amp using the tools from the tutorial.
Create a component and name the pins as shown in this schematic (ie IN-,IN+,etc)
You will need to add extra text for Vin and Vout.
Make the PCB
Now we will make the PCB of this circuit.
The finished board should look like this:
Use 'Translate to PCB' as in the tutorial to convert your schematic into a pcb.
In the PCB configuration
- Create a 2x2 in pre-defined board
- Basic 2 Layer Standard
- Default Layers and Board Parameters
- Special Requirement - Student
- Name your board with a 1 week turn around time and quantity of 1.
On your board, make sure you:
- Add 5 extra pins for Vin, Vout, V+, V- and GND
- Add silkscreen text for these 5 extra pins
- Change the trace size between GND and the op-amp to have a width of 0.05
- 5 vias as shown above
- 1 mitered track as shown above
