Max writes – “Here’s a DIY on how to make an alarm system in 3 minutes. We will use a loud buzzer and some magnetic switchs from Radio Shack to create a simple yet effective alarm system. We will throw in a LCD, keypad so we can alarm the alarm system using a 4-digit code […]
Here’s how to build a pretty neat looking sound meter, I just bought some ear projection that is rated for 30db, so this might be fun to test if they really work with a visual indicator… [via] – Link. More: MAKE electronics archives – Link.
Here’s an improved Atmel ATtiny13V solar charger, source and schematic included, Dick writes – “Batwatch is a simple monitor for a solar panel battery charger, using an Atmel ATtiny13V. It periodically measures the charge current and battery voltage, and shows them by blinking two LEDs. I built this circuit into the plug of a VW […]
Simon @ Scitoys shows you how to build a computer controlled wireless transmitter – “How would you like to send text messages to your friends without wires, and without an Internet connection, and without paying monthly fees? In this project we will build a very simple radio transmitter that you attach to a serial port […]
The gang over at Hacked Gadgets took apart a “spy video” car, if you need parts or want to base a project off a (somewhat) cheap set of components like RC control, video transmitter + video goggle, this might be the way to go. Plus you know in a few months this will be on […]
Finally, at last! You can build a low-cost, fully professional ASCII keyboard and encoder “Popular Electronics April 1974” – Link – but wait, there’s more, this keyboard showed up on the Apple 1 Computer – Link.
A MAKE reader writes in with a DIY RFID reader/cloner – “A public release of code & schematics for Jonathan Westhues’ Proxmark 3 RFID test device is now available. The device allows you to read, capture, and replay/clone transmissions from an RFID tag.” – Link & video of the device in action – Link. Related: […]
