Category Archives: Circuits and Electronics

Digispark bike speedometer

Lately I’ve been thinking about doing an Arduino or similar based project.  I heard about the Digispark (which is basically a mini Arduino) from AwkwardEngineer.com and was intreagued.  I’m thinking of using a Digispark to drive a I2C 4×7 segment … Continue reading

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Senasys – Made in USA snap discs

I need a snap disc that would open at 95F and close at 85F for the rack at work (triggers a shutdown of all equipment in the rack at 95F).  Senasys turned out to have the perfect solution.  Their switches … Continue reading

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Updated LM317 fan controller

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12v Fan Controller v1.2

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New 12v Fan Controller

This is my latest fan controller, based off a LM317 regulator.  It can be adjusted from fan turn on at 64F and max speed at 131F up to turn on at 104F and max speed at 167F.

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