Timeline for How to control a 3V laser from GPIO
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Oct 16, 2015 at 8:22 | history | edited | joan | CC BY-SA 3.0 |
Added laser current readings.
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| Oct 15, 2015 at 17:46 | comment | added | joan | @Cerin My red laser is rated for 20 mA, I do not use a resistor at all. I assume it just draws the 20 mA, although I have not measured the actual current. Since it has always worked I assume it's not like a LED which always needs a current limiting resistor. | |
| Oct 15, 2015 at 17:40 | comment | added | Cerin | What resistor values do you use on your GPIO pins? | |
| Oct 15, 2015 at 17:37 | history | answered | joan | CC BY-SA 3.0 |