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Will this work with a 12v Lead Acid Battery?
Ich habe meins von OBI.50 x 100 cm für ~13€
You just can Connect the Laser to Pin 0 (TX) to the laser and connect the photodiode to 1 (RX). Do so with 2 Arduinos. Now set a Low Baud (1200) and Print Something in the Serial Monitor on the First Arduino and it will Echo at the Second!