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SIMULATION CIRCUITS FOR DEVELOPMENT
This page contains circuits of projects that have been modelled on Crocdile Clips software. This has proved a very popular simulation package and allows pupils to model their circuits without damaging components. These circuits can be modified for specific purposes and added to GCSE coursework as research.

All Crocodile Clips downloads are less than 22K.

Information on Crocodile Clips software

CROC CLIPS CIRCUIT
DESCRIPTION
A neat little counter counting from 1 to 90 (not zero)
A 24 hour clock with hours, minutes and seconds
Gives an LED readout of low voltage batteries, from 1v to 12v
Download circuit, PCB and component layout - (PDF 27K)
Basic door switch alarm with entry and exit delay times and a timed alarm duration
Simple meter to measure car battery voltage - needs no extra battery.
A 4 digit timer that counts up to 59 minutes and 59 seconds.
A dice that switches off after 10 seconds to save battery power.
Download dual dice version containing circuit and PCB details - (PDF 84K)
Counts the number of times a door opens, only single digit but can be expanded
Drill Speed Controller PWM controller derived from a ramp generator and comparator - very stable design
Simple 555 egg timer
An electronic coin toss.
A simulation of a chaser circuit similar to Knight Riders awful car
Push a button to make the 4 lamps chase, stops after a while on a lamp at random
Download circuit, PCB and component layout - (PDF 31K)
Has adjustment for volume and tone, originally designed for a fishing bite alarm
Sequentially lights 5 LED's and beeps on the last LED. A good addition to a scalectrix track.
A 36 channel light sequencer that demonstrates a form of multiplexing.
A 37 channel light sequencer - with the help of some logic.
Download circuit, PCB and component layout - (PDF 62K)
Based upon a light sensor under the track, this will time alternate laps, used in the Scalectrix Lap Timer Project
A single digit counter for keeping track of visitors - Used in the Pig Sentry Project
Does as it says - uses a signal generator for the sound.
Use a wire and a rod as the monostable trigger and this will give you 10 chances.
A bass and treble control circuit.
Please note: This site is still under construction. Apologies for any frustration caused.
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