Posted May 22, 2013 by Chris

“Given that the HP 829292A is one of the hard to find accessories to for the HP Series 80 and it’s a must have if you don’t have some of the original expansion ROMs such as the Assembler ROM, the primary goal of this project is to design and build a functional clone of the HP 829292A module.”

Posted May 20, 2013 by Chris

“I needed an idea that I could use to teach myself about using a relay with Microcontrollers and solve that age old problem: Switching between speakers and headphones on my PC without having to actually get up and mess around in the rats nest of wire’s behind it.”

Posted May 17, 2013 by Chris

“This is the dedicated page about our first kit project – Eternal Free-swinging Pendulum, also known as Omni Pendulum. It’s a long and detailed story…”

Posted May 12, 2013 by Chris

“The goal of this experiment is to convert the Arduino board into an USB keyboard plus a VGA sniffer to crack the password of a standard BIOS using the brute force attack method. There are no advantages in using this method, in fact this can be very slow and you may never find the password at all, but as always we do it for fun.”

Posted April 8, 2013 by Chris

“I have tried two different types of etching for PCBs: the bubble tank and the shallow dish method….The shallow dish method involves finding a small shallow dish and filling it with just enough etchant to cover the board. I measure out about 250ml each time. To etch, the tray is placed in a tub of hot water and agitated back and forward, while I inhale the fumes from the tank. Eek! Hence the need for a mechanical solution.”

Posted March 9, 2013 by Chris

“Several years ago, I took a huge leap of faith, decided to buy a small CNC mill, set up a resin casting workshop, and invested months of intermittent trial, error, and triumph to understand and befriend both technologies and document them so that others don’t have to go through all the pain. It was well worth it, to be sure.”

Posted March 4, 2013 by Chris

“Over the weekend, me and a friend of mine, cannibalized a 9 Lira RC car into line a follower. Code in this post covers everything up to [this] commit cf731aedc156f067aa221, refer to this particular commit for this project cause we plan on improving hence code will change. Stuff you will need: 3x QTR-1RC Reflectance Sensor, Ardumoto – Motor Driver Shield and A cheap RC car.”

Posted March 2, 2013 by Chris

“The power supply distribution block (PSD) contains a 6 outlet surge protected power strip, emergency stop button, 5VDC wall wart, 7.5DCV wall wart, 9VDC wall wart, and a 12VDC wall wart. The purpose of this block it to supply power to all the systems of the machine.”

Posted February 24, 2013 by Chris

“This project seeks to develop an additional form of authentication for vehicle security, specifically in the form of a tapped password. The goal of this project is to implement this form of authentication and determine the level of possible security while maintaining enough flexibility to allow human variation in password inputs.”

Posted February 23, 2013 by Chris

“Start with a cheap bathroom scale from ikea, then strip out all the hardware except for the load cells. Add in the following: a microcontroller, roving networks bluetooth serial module, 24 bit ADC, 4 AA batteries, a linear regulator and input ORing diodes.”