As a Ham, of course I want to be able to examine frequencies, and the strength of the signal on that frequency. So imagine my excitement when I found the following Arduino solution! The Specan is actually a very simple
Everyone eventually runs into the problem of running out of I/O pins on the Arduino, and the Raspberry Pi. A shift register is a chip that can give you 8 or more additional I/O ports, while only using 3 ports
Ever want to use a 3×4 Keypad? These keypads from Adafruit can be used for numeric data entry or for access control for a security system. Our example allows you to input a multiple digit entry with a “enter key”
There have been some exciting improvements in the Arduino direct to MySQL communications. As a recap, this library allows a Arduino Ethernet or WiFi shield enabled Arduino to directly make SQL INSERT, DELETE, UPDATE, and SELECT queries, no intermediary code
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);
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