Thanks for your reply! Powering it by cr123a is a must, It will be a handheld laser pointer. I need to design my own pcb, because i also need to add attiny10 microcontroller to get button long press functionality, and it would be the best to have it in one package, because space is very...
Hello, newbie here. I want to drive OSRAM PLT3 520D diode with two CR123A batteries, that means around 6.5V. The diode itself in Datasheet says that operating voltage is typ. 6.1V max. 7.5V. I wanted to make constant current source with lm317, but it needs around 2v input voltage more than...