How to build driver for laser diode with using only 2 AA batteries suply (as in most common laser pointers) which gives me only 2.4 V (NiMH) or 3V (alcaline batteries) DC ?
LM317 works only with >3 V
my 650nm laser diode needs 2.1-2.5V and 18-25mA.
Thank You
LM317 works only with >3 V
my 650nm laser diode needs 2.1-2.5V and 18-25mA.
Thank You