Electronic Hobby Projects – Chemelec

This is one of the oldest Electronics DIY Project Sites in the Internet. I now discovered he has a dedicated domain too. Gary from Canada has many useful schematics and even provides kits and parts.

Electronic Hobby Projects – Chemelec

Some projects that may ring bells in your DIY Brain

  • A 10 Watt RMS Amplifier
  • A Solar or Wind Charger/Dump Circuit
  • A Cat or Dog Detector
  • Inverter, 12 volt unit, Mos-Fet design
  • A 25 LED Chaser”. (Sequencer)
  • A Metal Detector, for Pin Pointing.
  • Watt Meter”, Measures True RMS Watts
  • Pulse Induction Metal Detector

A Mos-Fet Power Inverter

A Mos-Fet Power Inverter

This circuit will provide a very stable “Square Wave” Output Voltage. Output Frequency is Adjustable and Stable. Can be used to deliver a wide range of output voltages by using appropriate turns ratio. Additional MosFets can be paralleled for higher power.

Sumo Robot project of Dave Chu

The following is my Computer Science project Comp490 and Comp492 in progress. It is a SUMO robot for our local RoboWar tournament. I have been, for the pass two years a participant of the annual RoboWar competition. So, this year I’ve decided to try to get credit for doing it.

Dave’s Sumo Robot project

Sumo Robot project

“I was fortunate enough to find a professor who was willing to supervise my project Dr.Ferhat Khendek. I have decided to do the documentation in HTML format and make it public to anyone who is interested in robotics.”

There are two class of robots, remote controlled and autonomous. Remote controlled are operated by a human participant via RF link. Autonomous on the other hand has to be self contained with no human influence in its operations with the exception to its programming.

Tuxgraphics AVR Microcontroller

Tuxgraphics AVR Microcontroller

AVR microcontroller based ethernet device / web server, version 1.4, kit

digital DC power supply unit – A very small an really good DC bench power supply unit for your hobby lab. It has lots of features which you normally find only in very expensive power supplies. This one is affordable, small and easy to build.

Temperature and humidity measurements with the AVR web-server – Just add this one SHT11 sensor. No other components are needed to measure temperature + humitidy + dew point.

Mini 3 digit display, a small and inexpensive voltmeter module – We build a simple and inexpensive three digit display. It’s a voltmeter module but it has also gerneral purpose digital IO pins.

Buy the Kits here – The tuxgraphics shop: shop.tuxgraphics.org – here you can get all the components needed to build a small Web-server for Instrumentation.

AVR microcontroller based ethernet device / web server, version 1.4, kit

Components and professionally etched printed circuit board for building a small web server. The main application of those web servers is not so much to provide large web pages but to be able to control hardware. You can switch something on/off, display sensor data, supervise network equipment …

QRP Homebuilder VE7BPO – Radio Design

Amateur and Short Wave Radio Electronics Experimenter’s Web Site

QRP Homebuilder VE7BPO – Radio Design

“The QRP/SWL Homebuilder site is owned and maintained by VE7BPO. The purpose of this website is to promote experimentation with relatively simple radio electronic circuits. Please keep in mind that I am a novice, lay person experimenter, not an engineer. “

  • Popcorn DC Receiver Mainframe
  • 40 M popcorn Superhet Receiver
  • Crystal Oscillator Frequency Offsets
  • Broadband Transformer Topics
  • Powdered Iron Torroidal Coating
  • Astable Multivibrator Circuits
  • W7ZOI JFET Biasing Tutorial

VE7BPO - Amateur Radio and Electronics

LEDs Page

How to Learn Hobby Electronics

VE7BPO has a way of presenting easy steps towards your Hobby Lab. It is Ham or Amateur Radio DIY Community that caused the outbreak of Electronic Hobbyist Activity the world over, long ago.

Here the Two Transistor Astable Multivibrator for flashing LEDs, that got popular after low priced Plastic Silicon Transistors became available, Superseding Metal Germanium ones.

More LED Flashers

Circuit Land – Tony Van Roon

Tony van Roon VA3AVR has built Circuit Land. This site is as old as the html web internet, means 1995. Earlier it was a part of a Canadian University Site, when i discovered it in late niceties..

Schematics, Hobby Projects, Tesla, Marconi, 555, Metal Detecting, Electronics-Tutorials and a lot more..

Circuit Land – Tony Van Roon

Circuit Land - Tony Van Roon

Highlights –

  • Morse Code Practice Keyer,
  • Constant Current Charger
  • Touch Activated Alarm System
  • Miniature FM Transmitter
  • Continuity Tester, Smart

Tutorials on Photosensitive Devices, Transistor Tutorial, 12 parts, Opamp and Digital Tutors. Compeonet Testing Methods. Basics of Batter Charging, LEDs and Relays too.