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Archive for September 25th, 2015

Alpha Geek Clock: New Battery

After the CR123A lithium cell in the Alpha Geek Clock gave out:

Packaged Alpha-Geek Clock

Packaged Alpha-Geek Clock

I duct-taped a pair of D cells onto the case and returned it to the bedroom shelf. According to the date scrawled on the tape, that was five years ago: 26 November 2010.

Over the last few months, the LED gradually faded from a blink to a steady glow as the battery voltage dropped below 2 V and the WWVB receiver output no longer reached the MOSFET’s threshold.

We’ll see how long these last:

Alpha Geek Clock - new batteries

Alpha Geek Clock – new batteries

Yeah, I should probably do something involving 3D printing…

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