Why am I talking about eReaders on a microcontroller site? Well, 5 years ago I had a house fire, and lost my 3000+ title library. I lived in an RV for a couple of years after, and did not have

A while back, we got a set of weather sensors from Sparkfun. It includes a Anemometer (speed), Wind Vane (direction), and a Rain Gauge. I used a hand held wind speed device to calibrate my Arduino code. I’m using pinMode(2, INPUT_PULLUP);

Want a DIY painfully bright rechargeable flashlight? Look no more, as here is one bad darkness kicker! I took a Nokia cellphone battery,combined it with a USB LiPo charger, a switch, and a few resistors, with a massive 700ma, 3.3v

Today I took a $3 433 MHz transmitter / receiver pair, and sent a string of characters 20′ from one Arduino to another. This could be useful for weather sensors, security alarms or remote control, etc. There are only 3

  Previously I have posted tutorials on how to interface a GPS to an Arduino, but this time I wanted to use a Raspberry Pi. Here is an easy and inexpensive Instructable I have posted, and expansion into other projects

The ACS712 is a very easy to use bi-directional current sensor. It comes in 5, 20, and 30 amp versions, and there’s only one line of code that needs to be changed depending on which unit you have. This sensor