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Open Source Temperature Controller- Appliance Heat Exchanger

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video Open Source Temperature Controller- Appliance Heat Exchanger Here’s a heat exchanger demo using the open source temperature controller. Full heat exchanger available here Intelligent controller, schematics, and code available here The open source temperature controller allows you the flexibility to control DC appliances based on the temperature of two thermistor inputs. The processor is […]

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How to Read Binary/Hex Thumbwheel Switch with an AVR Microcontroller

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This instructable will show you how to read the number on a binary pushwheel or thumbwheel switch using LED’s or an AVR microcontroller (I’m using an ATmega328p but this can be adapted for any AVR or probably another microcontroller of your choice). Multiple thumbwheel switches can be strung together to make an electronic combination lock,

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Slaveflash-trigger for digital cameras with Attiny24

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When flashing with digital compact cameras, the camera usually uses several small flashes before making the actual picture. This is o.k. if the built-in flash is the only flash you have, but if you want to use an external second flash you have a problem: The second flash, also called slave-flash, fires if the master-flash

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Apple-style LED pulsing using a $1.30 MCU using ATTiny85 microcontroller

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The Atmel ATTiny85 chip is an 8-pin MCU that is totally awesome.  If you’ve been programming with the bigger boys (the ATMega series), these are a nice adventure – you’re rather limited in the number of output pins, but a creative design gives us a lot of flexibility in a very small package. You’ve seen

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Watch futurama on an 8×8 pixel screen using atmega168 microcontroller

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here’s how to convert otherwise reasonable quality video into pixelated garbage and play it on a 2 color 8×8 led matrix, with no sound and only moderate sync. ingredients: – (1) 8×8 2 color led matrix – (1) atmel avr atmega168 – (2) 74hc595 shift register – (1) 3.3V regulator – (1) a linux system

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FanBus Digital Fan and LED Interface for PC using ATMega168 microcontroller

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Last year I modified a blue LED fan with RGB LED’s to enhance the look of my server case.  Last summer I built a gaming computer and ever since I wanted to light it up with multiple controlled lights and fans.  I finally figured out an easy interface and designed a simple network (the “fan

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