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a simple low voltage (single layer) multu-vibrator
usualy a 555 timer ic is used, but i couldnt source a low voltage one.
used to pulse a slow cycle of button presses on an ir remote.
relation between two capacitor will regulate the cycle. currently 100uF and 1uF capacitors call for 1sec/1ms cycle. approx.
done on breadboard but untested PCB, thanks Daniel and #2643 for the ideas