Alright i did an emitter swap today on a flashlight and thought it went well. Tried it out once i had it in place and everything worked fine. Put the reflector back in which rests right on top the mcpcb and i lose the ability to turn the light off and on as well as switch modes. The led stay on which i cant switch at all. The only way to turn it off is to take the batteries out. Did i short something or screw up the driver?
The reflector is shorting the LED- solder pad to the body ground, which bypasses the driver circuitry. I can't explain the 'won't turn off' part without more info as to how the light is set up - 'a flashlight' doesn't give enough clues as to switch location, battery layout, driver specs, etc.
Even without the reflector i get the same thing. Its a nitecore Ea4.
Ah, electronic/momentary switch, instead of a clickie on/off? LED- is shorted to ground, somewhere. BAT+ is always connected through the driver board straight to LED+, anything that connects LED- to BAT- (flashlight body) will turn the light on in direct drive.
Thank you for the information. Yes, it is a electronic switch. I believe my problem originated from one of the leads making contact with the star itself. I desoldered the leads from the led and had to make some adjustments to the heat sink. Put it back together and i still get some odd numbers. I dont have the leads attached to the led right now but i am reading 5.5 volts and about 7 amps. It also does not seem to be effected by the changing modes or turning it on and off. Is it still the problem you stated above? I thought taking the lead off of what it was touch would solve it but i guess not.