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7400 Logic Combination Lock
Reading Hackaday the other day I came across this article about a combination lock built from logic gates only. This reminded me of a similar circuit I designed and built at school for my electronics...
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Adding a SIM card to the Photon Q 4G LTE
Context: Let’s face it, the people want candy-bars. The European and North American smartphone markets are all about thin, lightweight glossy monoliths to fawn over and gently caress in a way that...
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Simple Solenoid Driver
Intro Recently I have been experimenting with CO2 injection for my planted aquarium and was interested in using a solenoid valve to control the CO2 flow, turning it off at night when the plants don’t...
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