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Step 3Poking around...
Time to take your LED flasher apart.
Good thing about this flasher is that it provides us with a readymade battery case and the LEDs are mounted under a bezel.
This one is activated by a soft rubber button switch. Pressing it a number of times will cycle it through its preprogrammed sequence of flashes.
Taking a look at the circuitry, we just need to add a momentary switch to bridge the traces under the switch. It looks like a bit of conductive foam was under the switchpad and pressing down on it closed the circuit on the circuit board. The momentary switch will have leads long enough going to the index finger.
I had trouble soldering to the thin traces. I ended up drilling a small hole next to the trace and fitted the wire in for mechanical support. I pooled up solder next to the trace to connect the wire. I think I actually had to burn up some coating that was on the circuit board in order to get the solder to stick.
That blob of epoxy or something in the middle of the board is covering some proprietary transistor or chip that controls the flashing.
Good thing about this flasher is that it provides us with a readymade battery case and the LEDs are mounted under a bezel.
This one is activated by a soft rubber button switch. Pressing it a number of times will cycle it through its preprogrammed sequence of flashes.
Taking a look at the circuitry, we just need to add a momentary switch to bridge the traces under the switch. It looks like a bit of conductive foam was under the switchpad and pressing down on it closed the circuit on the circuit board. The momentary switch will have leads long enough going to the index finger.
I had trouble soldering to the thin traces. I ended up drilling a small hole next to the trace and fitted the wire in for mechanical support. I pooled up solder next to the trace to connect the wire. I think I actually had to burn up some coating that was on the circuit board in order to get the solder to stick.
That blob of epoxy or something in the middle of the board is covering some proprietary transistor or chip that controls the flashing.
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