Electronics Infoline Web

99 Cent ESR Test Adapter

http://octopus.freeyellow.com/99.html

?C implements pushbutton light dimmer

http://www.edn.com/archives/1998/061898/13di.htm

?C squares input signal

converting a random-width pulse to a signal with the same frequency but with a 50% duty cycle is not easy but a small microcontroller can do it

http://www.edn.com/archives/1996/121996/26di_03.htm

A 146 Mhz. J-Pole Antenna

Here is a 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build using 3/4 inch copper pipe and the associated fittings necessary.

http://www.wb8erj.com/146jpole.htm

A Balun Tutorial Design

Balun description and a sample diagram.

http://my.integritynet.com.au/purdic/baluns.htm

A basic unregulated dc power supply

http://my.integritynet.com.au/purdic/power1.html

A Beginner's Guide to Making CW Contacts

How to start a CW or Morse Code conversation, what to talk about, the pleasure and art of CW.

http://www.netwalk.com/~fsv/CWguide.htm

A Camp Intercom

Did you ever try to make a telephone call on a campsite by using the tent pegs of your tent? Well, here's how you can do it.

http://www.radio-scouting.org.uk/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=33

A Capacitor Coupled DC Power Supply for CATV Applications

A design guide for a low cost transformerless power supply that will provide a regulated voltage at low current levels directly from the CATV cable line.

http://members.tripod.com/michaelgellis/capsup.html

A car race timer

implemented with PIC16F84 and three intelligent 7-segment displays

http://ele.tut.fi/teaching/74470/htyot/r2/index.html