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External arduino/microcontroller interface from motion sensor security light.
I’ve got a motion sensor security light (Heath/Zenith brand) that is very handy when going in or out of the house. I even use it at Halloween to trigger some props by unscrewing the bulbs and tapping off power to some clumsy relay activated circuitry. One oddity I noticed is that the little LED on…
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Homemade propane detector sequel
My homemade RV propane detector (see original post) has been working more or less okay since it replaced my ancient, broken Ten-Tek 800a. There’s been a couple of developments since then. First, I found another Ten-Tek 800a unit on ebay (sold as new-old stock, still in original box) which I bought because I’d spent enough time with…
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Repairing an RV Propane Detector
My old Ten-Tek 800A propane detector on the RV stopped working, announcing its failure with a continuous shrieking from its warning buzzer. It’s the type of detector that hooks into a solenoid-operated valve next to the propane tank so that if the propane detector isn’t happy it shuts off the propane, to reduce the risk…