Technology

HOW TO – Make a garage door monitor

HOW TO – Make a garage door monitor

HomeToys has a pretty intense garage door monitoring project (code included) – “One critical monitoring element for any home automation system is the garage door. There are many ways to do this including using your traditional magnetic contacts which will change state when the garage door is open or closed. This method satisfies the minimal […]

USB circuit design

USB circuit design

Electronics-project-design.com has a background of what USB is and does as well as a reference project to check out – “The following USB2.0 reference project from Freescale Semiconductor describes in detailed the design of a USB2.0 Card Reader. It support cards such as Compactflash, Memory Stick, Memory Stick Duo, Magic Gate, Secure Digital, MultimediaCard and […]

The ROBOTS are coming! – 1953

The ROBOTS are coming! – 1953

Interesting look back, forward – at robotics and computers from Mechanix Illustrated – 1953 (self-driving cars, robot elephants, prime number crunching computers, automatic factories, automatic sewing machines, self replicating Von Neumann machines) – “Our civilization is being invaded by a horde of mechanical men who are determined to change our way of life. But there’s […]

RF-Condenser microphone circuit

RF-Condenser microphone circuit

Here’s how to make a RF-Condenser microphone circuit that’s similar to a Sennheiser MKH series mic, Uwe writes – “This RF-circuit is operating at 7.68 MHz and 48 V phantom power supplied. It is tested with a large diaphragm cardioid capsule from Ralf Falk, who himself is designing a LF tube microphone and with a […]

“Hacking” Nokia cell phone LCDs

“Hacking” Nokia cell phone LCDs

Jakob has a handy guide on (re)using the Nokia cell phone LCD screens for projects, he writes – “Many old Nokia cellular phones have graphical LCDs based on the PCD8544 controller. These are perfect for various electronic projects with microcontrollers. The interface is a two-wire serial type (clock and data), and some additional signals. The […]