(laser diode used by the author) (laser beam sender circuit diagram) Laser Beam Receiver Circuit. Forepart of this circuit section is a 5mm photoresistor (LDR).This component is used to trigger the ...

Integrated Driver Circuit Figure 2 shows a solution with a dedicated APC laser driver IC 4 for CW operation up to 300 mA from a 2.4 to 15-V supply voltage. It requires only four additional passive ...

The value of R1 is determined by the maximum laser current required (in this case, 250 mA), adjusted by the laser diode's typical forward voltage of 2.0 V as given on the datasheet. Solving for R1 ...