17mm Laser contact board

by Cereal_Killer.
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2 layer board of 0.70x0.70 inches (17.86x17.86 mm).
Shared on November 20th, 2014 22:47.

Safety feature- cell inserted + end forward (like a flashlight) will reverse bias the diode and not allow current to flow. This uses the body as the + contact and the spring at the head is GND.

  • D1 is a Diode’s Inc PDS1040, rated 10A with a 490mv drop.

Be especially cautious to prevent shorts to +!

I made this as an additional safety feature- if my wife / kid’s pick up a laser not paying attention and stick a cell in like they would a flashlight nothing will happen.

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