I had two options: One required me to spend money. The other cost me nothing and gave me an opportunity to make something useful. To make a short story longer, I have an “analog” slow cooker (just a dial on the front) and I wanted the ability to set the cooking time and temperature. Now […]
Arduino-Based “Analog” Slow Cooker Controller Continue Reading
In LESSON 18 you learned how to use an ultrasonic sensor to measure distance, and in LESSON 19 you learned how to connect an LCD to the arduino. In this lesson we will combine what you have learned to create a circuit for measuring distance, and displaying results on an LCD display. – See more
Arduino LCD Project for Measuring Distance with Ultrasonic Sensor Continue Reading
The Meter The whole idea of this project was to create a giant meter to show website response time almost like a speedometer would. The result is something that’s both fun to watch and provides a meaningful ‘heartbeat’ of current status. After several revisions and different designs along the way, I ended up with what
I’m working on a project that requires full orientation information, so I built an Inertial Measurement Unit from scratch. I really like the 9DOF IMU board that Sparkfun makes – the calibration code that comes with it is fantastic – but I wanted to redesign the board so that it could be made at a
Smart lightbulbs cost your firstborn child. Which is a shame, because smart lights unlock tremendous potential for home automation, energy savings, and all sorts of cool projects. If only there was a way to control your lights without breaking the bank… And now there is! For $19 on Amazon, you can get a 4-lightbulb kit
Cheap Arduino Controlled Light Sockets – Reverse Engineering RF Continue Reading
In this project we are going to learn how to use the HC-SR04 PING))) ultrasonic sensor to measure distance. This sensor is also often used on robots to detect obstacles. Difficulty level: Easy Time needed: ±10 minutes Step 1: Things You’ll Need HC-SR04 PING sensor (x1) Arduino UNO (x1) LCD 16×2 (x1) 9V battery +
For a long time I’ve had old back up cell phones taking up space in my desk drawer. I was curious if I could put any of these old phones to some use. I can’t just throw them away so I decided to try and re-purpose one of them as a portable charger for my
I’ve been playing with the DRA818V modules that have been making quite a stir in the amateur radio world at the moment. I haven’t gotten one on a spectrum analyzer yet, but I have reason to believe that it will require a low pass filter to be RF legal. I’ll write more about that once I get
Designing and Building a 2m Low Pass Filter Continue Reading
Thanks LifeHacker and HackADay for featuring my post. If anyone has questions please leave a comment below and I’ll be happy to help! Have you ever wanted to wirelessly control power outlets from your phone? You could buy a Belkin WeMo Switch for over $40 for 1 outlet or build your own with 5 outlets for under $35 if you already own a Raspberry Pi. Hopefully
Wireless Power Outlets RF from Raspberry Pi Continue Reading
In short: I developed a portable, battery powered device that sounds an alarm when your bag or purse is moved. Once armed, can only be turned off by your secret code. The device is built off an Arduino compatible Trinket Pro, using an off-the-shelf project box with PCB. –——————————————————————— Problem I had: When I go
French 
English