2009/03/24

LED resistance calculator

Calculate LED resistance and how to connect them
http://led.linear1.org/led.wiz

2009/03/22

Solenoid knocker


The image above shows the solenoid module I mentioned in the class, you can buy it from here







Demonstration of solenoid


2009/03/21

Theremin Kit

http://www.harrisoninstruments.com/101/101_description.html

Electronics parts vendor

http://robotstorehk.com/
This store sells electronics parts, mechanical parts and sensors. Usually deliver within 3 days.