Hobby Projects - Insulation tester, LED Circuits, Meters.

Thursday, November 15, 2007

Electronics Tutorials - Ian Purdie VK2TIP

Electronics Tutorials - Ian Purdie VK2TIP
Offering free comprehensive basic electronics tutorials in amplifiers, antennas, ham radio, filters, oscillators, power supply, receivers, test equipment, transmitters, radio design and electronics design. Links to data sheets and electronics reference and text books.
  • Amateur Radio
  • Amplifiers
  • Antennas
  • Basic Electronics
  • Ham Radio
  • Oscillators
  • Test Equipment

Bob Blick - Projects for Students

Bob Blick - Projects for Students

Servo Pulse to Dual H-Bridge interface performs vital control functions needed for propulsion and steering of a "fighting robot".

Bob Blick - Projects for Students

LED Sign uses two LED arrays to form a 7 X 10 matrix. It produces moving messages or animations stored in an EPROM.

Oxygen Sensors. When they go bad your automobile runs poorly, learn about them and build a substitute for diagnostics or off-road use.

LCD Serial Terminal has RS-232 serial in/out, up to 20 programmable keys, Character LCD up to 2×40, 5 auxiliary inputs, 6 auxiliary outputs.

Ask Not What Bob Blick can do for you !

Wednesday, November 14, 2007

Elektronika Jaroslav Belza Projects

Elektronika Jaroslav Belza Projects

  • Acoustic tester
  • Electronic pot
  • Rectifier for bar display driver
  • Psofometric filter
  • 4 Channel Voltmeter Nebraska V4
  • Two-colour blinking AC indicator light
  • Electronic load

Electronic Peasant DIY Projects

Electronic Peasant DIY Projects

  • D.I.Y. Projects
  • Circuit Diagrams & Data Sheets
  • Salvage & Recycling


What's new? Clones of the legendary Steim Cracklebox: KrackleCats!

Tuesday, November 13, 2007

Radioing - RF calculators and Virtual Museum

Radioing - RF calculators and Virtual Museum

eHamRadio

  • Library - exams, code, operating aids, DX
  • Ham Tools - RF calculators, conversions
  • Virtual HamShack, callsigns, links, photos

eEngineer

  • Electrical Engineering Topics
  • Electromagnetics, Glossary
  • Interference, RFI

Ham Radio Virtual Museum

  • A Virtual Museum of Ham Radios
  • Transmitters, Receivers, Transceivers
  • Photos & Specifications of the Classics


Monday, November 05, 2007

Electronics DIY Electronic Schematics

Electronics DIY Electronic Schematics

Illustrated Projects to spruce up your hobby lab.

LC Meter

  • Very Accurate LC Meter based on PIC16F84A IC.
  • PIC Dual Temperature Meter
  • AVR Programmer
  • Microcontroller Voltmeter / Ammeter with LCD
  • Digital Voltmeter with 3.5 LCD Display
  • High quality PIC programmer

Thursday, November 01, 2007

VK5JST Amateur Radio Ideas with Photos

The new Ham Project Pages are VHF/HF Aerial Analyser, A 600MHz Frequency Counter.  Then there is a an ESR Meter for Electrolytic Capacitors.

VK5JST Amateur Radio Ideas with Photos

With a two tone tester, a dummy load and an oscilloscope, a transmitter can be really put through its paces. Two tone testing consists of applying two clean non-harmonically related sine waves of approximately equal amplitude to the audio input of an SSB transmitter.

 A Simple Two Tone Oscillator

The sine waves are typically around 600 - 700Hz and 1800 - 2000Hz i.e. about 300Hz from either end of the audio pass band.

A Simple Two Tone Oscillator

This project was published in the September 2004 issue of the Australian magazine "Amateur Radio".

Other Readworthy Pages
  • Easy PCB's Made With Kitchen Appliances
  • How to Make a Q Meter
  • Making a High Current 13.8 VOLT Supply For SSB Transceivers
  • VK5MM's excellent amateur radio homepage
  • Transformer Construction Details
  • Shortform Method of Designing Power Transformers 
The photos at VK5JST Homepage are very educative and express the idea better than words. - delabs