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 +
Simple Distance Measuring Device Continue Reading
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
Portable Charger for your Smartphone Continue Reading
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
Bag movement alarm for theft prevention Continue Reading
I wanted to have my personlal, nice looking Mediabox with a big display and remote control. I’ ve been playing around with the Raspberry for a while so I decided this would be the platform of choice for this project. I’ m actually a fan of Steampunk so I decided to use a Steampunkish style
Raspbmc Mediabox Steampunk style Continue Reading
I’ve seen a few meter clocks in my travels of the web, and I love the idea. A few days ago, I decided that I must have one of my own. Such began the “How to do it” pondering cycle. I had seen builds where the face plate of the meter is replaced. This works,
Meter Clock: Keeping “Current” Time Continue Reading
Parts List Raspberry Pi Model B Adafruit LCD Keypad Pi Plate Adafruit PowerBoost 500 3.7v 1200mAh Lipo Battery Wrist Mount USB Sound Card 3.5mm Microphone Software NOOBS\Raspbian PiFM Adafruit LCD Keypad Library RaspWristRadio Python Script For more detail: RaspWristRadio – Wearable Personal FM Radio Station
RaspWristRadio – Wearable Personal FM Radio Station Continue Reading
Ever been looking for your keys, and wanted to call them, before you realize that they are hideously analog pieces of metal? Or wanted to let someone into your house when you’re not at home, without having to lend them your keys? Lockitron was the solution that descended from hardware heaven – a device that
Open source BLE door lock Using Arduino Continue Reading
Getting Started! I had recently bought an original Gameboy DMG from Good Will for a whopping $5.00, condition unknown. Taking a gamble, I purchased it and took it home to find that it had severe damage caused by a battery that exploded and leaked all over the mainboard. I had also recently started looking on
Super Mega Ultra Pi Boy 64 Thingy Build Continue Reading
