Why flashing Laser Died? Answered
I have a laser pointer from the dollar store which I have hacked to fit a usb cord. 3 button batteries came with the laser, so, I figure 4.5v is right. Then I was hacking a magnetic door alarm (siren when the magnet is away from it) Again- 3 batteries, so 4.5 v plus or minus x. The alarm hack is to provide pulsing DC when the magnet is spun in a drill past the reed switch in the alarm.
So, I plugged the laser into the pulsing DC, and it worked for a while, then crapped out.
Why did it die?
slightly different v from different chemistry in the batteries?
or from flashing?