ELECTRONIC PROJECTS
TEACHING RESOURCES
HELP
CIRCUIT DESIGNS
Most of these circuits I have designed and tested. Some are copies of circuits demonstarting a neat or clever way of functioning. I don't take any responsibility for anyone using them and feel free to adjust or modify them as you wish.

Some PDF's have PCB's generated for the circuit ready for construction.
Do check the scale of the drawing after you have printed it out.

Designs are available as GIFs and PDF's.
To open the simulations you will need
Crocodile Clips v3 or 4 or LiveWire.

This page is currently being updated. Bold links in capitals lead to new pages for faster viewing of circuits. All circuits will be completed as time allows.

On this page...

FORMATS:
= CrocClips,
= GIF
= MGX Draw file.
= PDF
= Livewire
= PCB Wizard

Modified:
19:12, 25 August 2008


AUDIO

GAMES

HOBBY STUFF

COUNTERS & TIMERS
  • 1-90 Counter
    A neat little counter counting from 1 to 90 (not zero) with the aid of a few gates -
    -
  • 24 Hour Clock
    A good example of using gates to "trap" binary count values -
    -
  • Digital Stopwatch
    Times up to an hour in tenths of a second - -
  • Door Monitor
    Counts the number of times a door is opened. Counts up to 9 but can be easily expanded - -
  • Egg Timer
    A very simple 555 timer, activates a sounder at the end of the time period - -
  • Large 7-segment Display board
    A resizeable display from 40mm to 150mm! - -
  • Room Sentry
    Counts the number of people entering a room, for use with a PIR module - -
  • Scalectrix Lap Timer
    Works by using an LDR under the track, times alternate laps in 10ths of a second - -
  • Single Digit Scoreboard
    A compact general purpose display. - -

MEASUREMENT & TEST STUFF

MISCELLANEOUS
  • 12v Light Dimmer
    A basic light dimmer for lamps up to 24W - -
  • Dog Warden
    A simple radio transmitter and reciever to signal when a dog has strayed too far - -
  • INVERTER - NEW
    Generates a negative supply in a battery circuit for split power supply circuits.
  • Knight Rider
    An adaption of the Light Bouncer makes a classic light chaser - -
  • Light Bouncer
    A a simple chaser from a decade counter - bounces a light back and forth on 6 LED's - -
  • Remote Control Beeper
    Uses RF Tx/Rx modules with a range of about 30m
    . - -
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