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Month: April 2015

Arduino UPS / Battery Shield

We just picked up a LIPO shield from Adafruit, which allows us to battery power our projects. The shield contains a optional 2Ah LIPO battery, and recharges from a mini usb cable (same as a Kindle). You can power your

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Solar & Wind Data Logger Video

This data logger monitors a solar or wind off -grid power system. A current shunt and voltage divider monitors the voltage and current of the system. This data is displayed on the LCD and written to the SD card along

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Arduino LM35 Temperature Sensor

One of the least expensive and simplest ways to measure temperature is with a LM35. This is another component found in our SainSmart kit. This transistor looking device has 3 pins, 5v, Signal out, and Gnd. The signal is an

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Arduino Relay Control

Previously I have blogged about using relays with an Arduino, and SainSmart relays specifically. A while back I received a 4 relay, and a 8 relay board, and both of them used negative logic, i.e. a LOW activated them, and

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Adafruit RGB I2C LCD Keypad Shield

This project is a bit more complicated than some we have done recently. Adafruit makes a very nice LCD Keypad Shield, that unlike most of the others, has a 2 wire I2C interface (covers the lcd and the keypad), and

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