Category Archives: electronics

Relay Power Control

I could control the mains using a Triac and will probably try an experiment with that later. But using only components that I understand means a relay. So, following the excellent description on SparkFun you end up with a simple circuit with a NPN transistor that switches on the coil of a relay. The description [...] Continue reading

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Power Supply

The approach I’m going to take with this project is to design and build each part of the mains controller as independent circuits and evaluate / play with them. When I have them all hooked up in a way that works and that I’m happy with, then I can draw a schematic and board layout [...] Continue reading

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A Plugin Mains Socket Controller

I’ve thought of a new project. I’m going to build a plugin controller for a mains power socket. This will replace the cheap ones that I have around the house. Continue reading

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DIY radio controller for Lego

This was an experiment with a couple of Holtek remote control encoder and decoder chips (HT12E and HT12D) together with a cheap RF transmitter and receiver pair I picked up off ebay. OK, so the chips are not really designed for controlling models (more… Continue reading

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Make your own annoying musical greetings card!

I love the tiny 8 pin PICs from Microchip.. an entire computer in a package the size of a fingernail that costs pennies and can be programmed from your PC using just C and run on a watch battery. They’re great.. but its taken me a while to find a use f… Continue reading

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