Modifying a Tower SG90 servo for continuous rotation with potentiometer position sensing, Part 1: Investigation and continuous rotation

Keith wrote an article on modifying a Tower SG90 servo for continuous rotation with potentiometer position sensing: On its own, the servo takes power, ground, and a position input and moves the shaft within a range of rotation to match the angle requested on its input wire. It has one or more stops in its gearbox to […]

Solar scare mosquito

Here’s a cool Solar scare mosquito project by Gallactronics.  He writes a complete step-by-step instructions here: So I built a device that generates air bubbles at regular intervals and effectively produces ripples up to a radius of 2 meters (sufficient for most urban water bodies). The device automatically switches on when it comes in contact with water […]

The Curious C-Beeper capacitance measurement

Check out Alan Yate’s video about the Curious-C Beeper: When a capacitor is touched to the probe, the probe beeps at a frequency that varies with capacitance. The frequency change is so steep with capacitance that tiny capacitors may be precisely matched or an exact fixed value may be selected to replace a trimmer in […]

Hacking and moding the TP-Link WR703N OpenWRT Wi-Fi router

TP-Link WR703N is a OpenWRT supported Wi-Fi router that comes with ‘only’ 4MB of flash and 32MB of RAM. If you are not satisfied with these, they are easily upgradable as described in the forum. RAM can be upgraded to 64MB if you are not afraid of hot air soldering. Just take out one chip […]

New Scientist TV: How to hack a snail to create a living battery

Dan Mikesell writes in Hacker Space Seoul- Open group: ‘this is some serious mad scientist hacking‘ In this exclusive video, you can watch how the animal was turned into a power source. Through slits cut in its shell, electrodes coated with enzymes are implanted in its body. Glucose and oxygen in the snail’s blood become fuel […]

HACK: Open source USB stack on MCP2200

Microchip has a new USB->serial converter chip called the MCP2200. We suspected they made this chip from a 20-pin PIC. The MCP2200 pinout is like other PIC uCs, and it has similar reset pin and internal voltage regulator circuits. We hooked up our trusty PICKIT3 and read the device ID. The MCP2200 was recognized as a […]

Hacking RGB Christmas lights

Deep Darc has successfully reverse engineered the operation of a 50-light set of GE multicolor Christmas lights. His work involved snooping the protocol used on the LEDs data bus line and exploration of the remote control unit, resulting in source code allowing control of the display of colors and patterns by an Attiny13A. Via Wonderhowto.

Bus Pirate: High-speed firmware updates

See the latest version in the documentation wiki. Quality control tests on the Bus Pirate preorder 1 flagged about 50 out of 400 units as defective. The terminal interface worked fine, but the bootloader wouldn’t connect. The solution was to decrease the speed of the quick programmer utility to the Microchip recommended default, 9600bps. Unfortunately, […]