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Multichannel USB Analog Sensor using ATMega48 Microcontroller

Sometimes it’s tempting to re-invent the wheel to make a device function exactly the way you want. I am re-visiting the field of homemade electrophysiology equipment, and although I’ve already published a home made electocardiograph (ECG), I wish to revisit that project and make it much more elegant, while also planning for a pulse oximeter, an electroencephalograph (EEG), and an electrogastrogram (EGG). Th ...

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Nikon Camera Remote Control using ATtiny13 Microcontroller

This is an IR remote control for Nikon cameras. It is compatible with the Nikon ML-L3 remote control. Supported cameras include: D40, D40X, D50, D60, D70, D70s, D80, Coolpix 8400 8800. This design is based on an idea from http://www.bigmike.it/ircontrol/. The circuit is extremely simple: an ATtiny13V, button, transistor, resistor, IR diode and 3V battery. You could even omit the transistor and resistor, and ...

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DIY USB password generator using ATtiny Microcontroller

Having done half a dozen V-USB tutorials I decided it’s time to whip up something cool. As USB keyboards were an area untouched, I decided to make a small USB HID keyboard device that types a password stored in EEPROM every time it’s attached. A new password can be generated just by tabbing CAPS LOCK a few times (4 times to start password regeneration and one tab for each password character generated, 10 is ...

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Prime Calculator is Complete using ATMega8 Microcontroller

My microcontroller-powered prime number generator/calculator is virtually complete! Although I’m planning on improving the software (better menus, the addition of sound, and implementation of a more efficient algorithm) and hardware (a better enclosure would be nice, battery/DC wall power, and a few LEDs on the bottom row are incorrectly wired), this device is currently functional therefore theoretically co ...

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LED Dog Collar using ATTINY2313 Microcontroller

LED Dog Collar So this is a pretty simple project, but I thought it was a clever idea. I have 2 dogs, a lab and a lab mix. The lab "Sunshine" likes to runaway a lot if we let her outside at all. She always comes back, but we can't find her whenever she leaves. This worries us sometimes because we don't want a car to hit her, especially at night. Anyways, my idea came from this that I could make some type of ...

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Making a USB based AVR Programmer using ATMEGA8 Microcontroller

Around time when I was beginning to learn about microcontrollers I had exchanged my laptop with a senior at college for his desktop - that's because the only way I knew how to program an ATMEGA chip was through either a serial port or a parallel port. USB programmers were not available widely and were generally thought to be expensive. The programming setup using a parallel port was very simple. I followed ...

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Arduino VGA via Interrupts using AVR Microcontroller

Part 1: Introductio For some people, interrupts are a mystical thing that they think they will never understand. To that I say non-sense! And to that effect and to help us also better understand VGA, let's see if we can't output some basic VGA signals like we've done before, but this time using some interrupts! In this article we'll explore how to output VGA signals from an Arduino UNO by using the timer in ...

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