https://hades.mech.northwestern.edu//index.php?action=history&feed=atom&title=Using_a_laser 2026-05-19T11:31:54Z Revision history for this page on the wiki MediaWiki 1.43.8 https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5917&oldid=prev 2007-12-27T20:43:52Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:43, 27 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for digital logic is nominally 5V, most chips limit their maximum <del style="font-weight: bold; text-decoration: none;">currect</del> severely, typically to 25mA. So, connected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for digital logic is nominally 5V, most chips limit their maximum <ins style="font-weight: bold; text-decoration: none;">current</ins> severely, typically to 25mA. So, connected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5574&oldid=prev 2007-12-14T21:34:54Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:34, 14 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for <del style="font-weight: bold; text-decoration: none;">didgital</del> logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, connected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for <ins style="font-weight: bold; text-decoration: none;">digital</ins> logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, connected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5573&oldid=prev 2007-12-14T21:34:16Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:34, 14 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values than 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for didgital logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, <del style="font-weight: bold; text-decoration: none;">conected</del> directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for didgital logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, <ins style="font-weight: bold; text-decoration: none;">connected</ins> directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5572&oldid=prev 2007-12-14T21:34:00Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:34, 14 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A laser module contains a solid state laser diode and some control electronics. Most of these modules expect to be provided 3 volts, and they draw about 40mA. </div></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A laser module contains a solid state laser diode and some control electronics. Most of these modules expect to be provided 3 volts, and they draw about 40mA. </div></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values <del style="font-weight: bold; text-decoration: none;">tha</del> 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values <ins style="font-weight: bold; text-decoration: none;">than</ins> 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for didgital logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, conected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> <td class="diff-marker"></td> <td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for didgital logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, conected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5571&oldid=prev 2007-12-14T21:33:28Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:33, 14 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:laser.jpg]]</div></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:laser.jpg<ins style="font-weight: bold; text-decoration: none;">|right</ins>]]</div></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A laser module contains a solid state laser diode and some control electronics. Most of these modules expect to be provided 3 volts, and they draw about 40mA. </div></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>If you want to run a laser module from a 6V supply or battery, you can put a resistor in series with it, of about 100 ohms. The "extra" three volts, across the 100 ohm resistor, corresponds to only 33mA, which is less than the current laser module normally handles, so the laser module is safe. Higher values tha 100 ohms will make the laser dimmer. Lower vales may burn it out. For a 12V battery, use 300 ohms, etc.</div></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>You can also operate a laser diode directly from a digital output line of a PIC or digital logic chip. Even though the Logic High voltage for didgital logic is nominally 5V, most chips limit their maximum currect severely, typically to 25mA. So, conected directly to a laser module, the logic level will "sag" to about 3V and the laser module will illuminate nicely.</div></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5569&oldid=prev 2007-12-14T21:24:36Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:24, 14 December 2007</td> </tr><tr> <td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:laser.jpg]]</div></td> </tr> <tr> <td class="diff-marker" data-marker="−"></td> <td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Laser</div></td> <td colspan="2" class="diff-empty diff-side-added"></td> </tr> </table>

LIMS https://hades.mech.northwestern.edu//index.php?title=Using_a_laser&diff=5568&oldid=prev 2007-12-14T21:23:24Z

<p></p> <p><b>New page</b></p><div>Laser</div>

LIMS