PICAXE Raspberry Pi ADC

In this instructable I will show you how to use a cheap PICAXE micro-controller as a multiple channel analogue to digital converter. We will be using I2C to access the PICAXE, which will be writing the adc values into the memory registers. The Raspberry Pi does not have a built in ADC, which is unhelpful if you need to read any kind of analogue value, such as a variable resistor position or a light level et ...

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16 Channel relay board for your Arduino or Raspberry PI – 24V

A general purpose 16 SPDT channel relay board (power supply 24VDC) for switching high-current electrical loads (both AC and DC) siuch as motors, lights, pumps, contactors and more. With this relay board, any logic-level signal from 3V up to 30V can be used to activate a relay (it may be controlled direclty by microcontroller TTL logic as well). It can be used successfully for example with PIC,AVR,ARM microc ...

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Raspberry Pi Spy Tank

I got a first prize from PI/E day contest. (yaayyy. Thanks for all the awesome voters!!!) I would like to reward the first 10 people to contact me. I have 10 pieces of 3 month PRO membership codes to giveaway. Write a comment to this project or send me a message and tell me why you should get a free code. The best answer will get a free 1 year PRO membership! So in total 11 PRO memberships are given away! L ...

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Electronic circuits for your Raspberry Pi : useful tools

f you want to make some simple electronic circuits for your Raspberry Pi, you may need some useful (software and hardware) tools. Hardware tools Breadboard The breadboard (aka prototyping board, or plugboard) allows you to prototype your electronic circuits without the need to solder components. You just have to plug them into the board, and when you're done, unplug them to test another circuit. The breadbo ...

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Automatic Reset Switch For Pi

In this instructable I describe a method for automatically resetting a Banana Pi when it freezes, or looses power and does not restart. This method will also work for the Raspberry Pi as long as the correct GPIO pins are used (which I believe are slightly different than the Banana Pi pins). The method is very simple and uses a small circuit containing an ATtiny45 microcontroller and a small relay to turn th ...

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MIPS tempts hackers with Raspberry Pi-like dev board

Hard to choose between Raspberry Pi, BeagleBone Black, and MinnowBoard Max? Now there’s another choice: the open source MIPS-based “Creator CI20″ dev board. In a bid to harness some of the energy and enthusiasm swirling around today’s open, hackable single board computers Imagination Technologies, licensor of the MIPS ISA, has unveiled the ISA’s counter to ARM’s popular Raspberry Pi and BeagleBone Black SBC ...

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Using the Dagu Pan/Tilt Kit with the Raspberry Pi

The Pan/Tilt kit that we sell, developed by Dagu with the guys over at Let’s Make Robots, is a great way to mount mobile sensors on your robotic projects. In this tutorial we look at how you can control the Pan/Tilt kit with a Raspberry Pi and the Python programming language. Required Materials and Equipment Pan/Tilt Kit Raspberry Pi Breadboard for making connections Breadboard header pins Wires with 2.54mm ...

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How to use Kernel GPIO interrupts on the Raspberry Pi

Presumably everyone knows what the Raspberry Pi is, by now, so I’ll not start there. You may or may not know that the RasPi has General Purpose Input/Output (GPIO) pins as standard. Some of these provide 3.3v power, some provide 5v power, some are grounded and the others can be used for input and output. Pins will output 3.3v when connected to ground and will be ‘raised’ as ‘on’ when 3.3v is supplied to the ...

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Build a remotely activated sprinkler using PiFace and Ubidots

This is a cool example that teaches you how to use a Raspberry Pi, a PiFace and Ubidots to water your garden from far away. You'll be able to control an electro-valve remotely to water your plants from any place, just using your phone. Step 1: What do you need? Well you'll need some materials: 1. Raspberry Pi Model B 2. A PiFace Digital 3. A Water Valve - 12V 4. A Flexible Wire (1Amp) 5. A DC Jack 6. Power ...

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Arduino weds Raspberry. The “Freeboard” project

"If you imagine it's possible, someone else is already trying to doing it, or has already done it." The Installer. This was how I left my musing on the fictitious open source Celestronic M1 chart plotter system. I wasn't aware at the time how extensive the efforts were by an ever increasing cabal to build these types of systems. My screen display was photoshopped, the ones below are real. Another aspect of ...

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