Hobby Projects - Insulation tester, LED Circuits, Meters.

Thursday, November 15, 2007

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