Simple Laser circuit problem?
They each draw around 3v and 300mA (they are those cheap 5mw green pointers).
I connected the end leads to a 19.5vdc 4.5A laptop wall wart power supply.
I taped all of the laser buttons into the ON position.
Aannnd... ...nothing happens.
The lasers are fully functional when using batteries, yet when wired up in this way there is no light.
What is wrong with this setup?
EDIT: I can also garuntree that all connections are perfect, and there is pleanty of voltage and current coming from the wall wart.