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Archive for January 28th, 2018

Astable Multivibrator LED

Having run out of dead CR123A lithium cells, I soldered up another holder to work through a handful of dead AA alkalines:

Astable Multivibrator LED Blinky - AA Alkaline mod

Astable Multivibrator LED Blinky – AA Alkaline mod

It’s amazing how much light comes from a single wearable LED powered by a dead battery in a dark room!

Stipulated: I should have 3D printed a CR123A cell adapter. Maybe next time …

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