Hobby Projects - Insulation tester, LED Circuits, Meters.

Thursday, January 17, 2008

MAKE Magazine DIY technology projects

Devoted entirely to DIY technology projects, amazing projects for home, backyards, basements, and garages.

MAKE Magazine and DIY Kits

MAKE brings the do-it-yourself mindset to all the technology in your life. MAKE is loaded with exciting projects that help you make the most of your technology at home and away from home. This is a magazine that celebrates your right to tweak, hack, and bend any technology to your own will.

Then there is the Maker SHED. When you give gifts, give something to inspire them to build their skills and learning. You can buy some of these yourself, to use up the spare time constructively. Hobby DIY is learning, skill building, physical and mental exercise. It makes you an healthy and happy individual. It saves cost too …. you will buy things prudently and handle them with care and fix them when they go bad. This is only Because …. you know, what makes them spin and rattle.

Make: Electronics Deluxe Toolkit

Make: Electronics Deluxe Toolkit

Instructables - The Worlds Biggest DIY and How To

"Instructables is a web-based documentation platform where passionate people share what they do and how they do it, and learn from and collaborate with others. The seeds of Instructables germinated at the MIT Media Lab as the future founders of Squid Labs built places to share their projects and help others."
instructables.com-category-tech

Instructables - The Worlds Biggest DIY and How To

Vintage Radio Information

Vintage Radio Information

This website is a repository and archive for a range of documents and other material of interest to collectors of vintage radios. - Paul Stenning

Friday, January 11, 2008

4QD-TEC: Electronics Circuits Reference Archive

4QD-TEC: Electronics Circuits Reference Archive|

4QD-TEC: Electronics Circuits Reference Archive.
  • Electricity - an analogy with water
  • LED VU meter
  • Colour codes and multipliers
  • Logic circuits using discretes
  • Gyrator - used in graphic equaliser
  • Thermometer and thermostat
(Design with discretes, Make basics sound, 4QD-TEC will show how in circuit examples - delabs)

Friday, January 04, 2008

Lars Petersen OZ1BXM QRP Denmark

Amateur radio homepage by Lars Petersen of Holstebro, Denmark. The Useful Articles include some good rules for the QRPer and Main HF rig and antenna.

Lars Petersen OZ1BXM QRP Denmark
 
CW, QRP, and satellites. Satellite radios and PIC experiments like the one below. The K3 testboard for 16F873

Lars Petersen OZ1BXM QRP Denmark

The main components are: A 7805 bolted to a small heatsink, a blue reset button, a red LED, a serial I2C EEPROM (24LC256), four DIL switches, the 16F873 with 4 MHz crystal oscillator, a real time clock (DS1302) with lithium battery backup and a MAX232 for serial communication. I'm using an external power supply which is able to provide 12V DC at 300 mA.
 
Ham radio blog by OZ1BXM
 
SSPA for 2 meters - 1 kW module - The core of the SSPA is the 1 kW amplifier module. The module is built around the LDMOS transistor MRFE6VP61K25H from Freescale. This device can operate between 1.8 MHz and 600 MHz and delivers 1250 W output. In this application, the output is limited to 1000W.

Thursday, January 03, 2008

QRP Homebuilder Short Wave Radio

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