Hardware hacks

The UNO Overdrive

What do you do when your micro-controller project runs out of horsepower? Well you increase the power in a way or another, like increasing clock speed (maybe up to over-clocking) or change to a faster processor family. What to do when your Arduino Uno isn’t fast enough? The UNO Overdrive article shows The Uno/Dumilanove Overdrive,

RTL-SDR receives Bluetooth LE

  Sniffing and Decoding NRF24L01+ and Bluetooth LE Packets For Under $30 article points to an interesting hack: able to decode NRF24L01+ and Bluetooth Low Energy protocols using RTL-SDR (=a cheap USB digital TV tuner based digital radio). So cheap practicality anyone can obtain the equipment quickly. Some special hacking was needed because there are

Your Mouse Is A Terrible Webcam

Did you know that your optical mouse contains a very tiny, very low resolution camera? Your Mouse Is A Terrible Webcam article tells how to turn that tiny optical sensor into a webcam. Logitech RX 250 has an ADNS-5020 optical sensor (15×15 pixel grayscale image sensor) with SPI interface. The project uses Arduino, Ethernet shield,

Computer control of Automated Mains Sockets

Safe Automated Mains Sockets page describes how to turn mains powered appliances on and off under computer control without risking killing yourself. It describes how to use a Raspberry PI computer to control three mains sockets. Audacity was used to capture the codes from the original RF remote, and the captured codes were sent to

Radio-Controlled Bus Stop Displays

I just found out some interesting reverse-engineering hack related to Helsinki bus stop displays. Tapping Data From Radio-Controlled Bus Stop Displays tells that a couple of weeks ago hacker Oona Räisänen told about finding a 16 kbps data stream on FM broadcast frequencies, and her suspicion was that it’s being used by the public transit

Arduino overclocking

Liquid nitrogen (finally) makes an Arduino project cool. Overclocking Arduino with liquid nitrogen cooling. 20⇒65.3Mhz @-196°C/-320°F article has this video that shows how it is done. It turns out that you can run an Arduino UNO at 65.3MHz when it is cooled with liquid nitrogen. Arduino UNO / ATmega328P at 8V is stable at 65.3Mhz