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This DIY USB travel charger is powered by two NiMH rechargeable batteries in series (2.4V DC) and uses the LT1302-5 DC-to-DC booster to derive +5V, 500mA output. The output is accessible through an USB port so that mobile devices can be simply plugged in for charging.
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Microchip Technology Inc., a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, today announced a new power monitoring IC, the MCP39F501. This device is a highly integrated, single-phase power-monitoring IC designed for real-time measurement of AC power. It includes two 24-bit delta-sigma ADCs, a 16-bit calculation engine, EEPROM and a flexible two-wire interface. An integrated low-drift voltage reference in addition to 94.5 dB of SINAD performance on each measurement channel allows accurate designs with just 0.1 % error across a 4000:1 dynamic range.
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Matt Cavanagh, a Windows phone app developer from South Africa and the author of the Netduino Home Automation Projects book, built this Bluetooth controlled car using the Netduino board. He uses a Windows Phone to control the car over Bluetooth. The beauty of this project is that he 3-D printed the frame and wheels for the car. His next goal is to mount a second Windows Phone on the car and use Skype to stream the live video from the car.
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This heart-shaped LED chaser would be a nice addition to your bouquet or any other gift for Valentine’s Day. The build process is very simple and uses the 555 timer IC (configured as an astable multivibrator) and CD4017B decade counter.
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This learning project from Adafruit describes how to make your own point-and-shoot digital camera using the Raspberry Pi board. In addition, you will also need the Raspberry Pi Camera Board, a TFT touchscreen, a battery pack and a Wifi adapter to automatically transfer pictures to another PC for editing.
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