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 […]
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 […]
Lucy Matchett, Nicole Yi Messier, and Joselyn McDonald (Snax_and_Macs) made a remote flower-watering device so you can water your loved ones’ plants when you water your own. We used Arduinos, a photoresistor, a servo, Arduino and Processing sketches, Spacebrew, and a little elbow grease to put it all together. Via Hacked Gadgets.
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 […]
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 […]
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 […]
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 […]
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.
Geek guru Jeri Ellsworth is at it again, continuing with her exploration of homebrew radar devices. In this installment satellite dish hardware is interfaced with an FPGA to provide Via Hack A Day.
Here Collin’s Lab at Makezine explores the use of microcontrollers as USB host controllers. Very instructive and worth a look by anyone wanting to learn more about USB and its integration with microcontrollers. Via Makezine
Siklosi mega-sized his IR Toy with a second wide-angle LED from an old remote. In certain situations the LEDs will compete for current and one will dominate, but Siklosi’s video test (after the break) shows them both working pretty well. Grab a regular IR Toy for $20, including worldwide shipping.
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, […]