Originally the burp sound simulator circuit was built as quick lash up but because it was so popular, especially with children, it is still in everyday use. Exactly what it […]
Reaction Tester – Fastest Draw Game Circuit
Have you ever wondered how your reactions compare to those of other people? This reaction circuit is designed to do just that, it will show scientifically which of the two […]
Simple Insect Repellent Circuit [Tested]
The theory of insect repellent circuit is quite complex though it is possible to give a rough outline of what happens. It seems that mosquitoes and other nasty insects only […]
Simple Electronic Organ Circuit
Actual electronic organs are pretty sophisticated devices they comprise tone generators for the basic notes with dividers to provide a range of octaves. In addition ‘voicing‘ is provided so that […]
Radioactivity Detector Circuit
The term “Geiger Counter“ refers to a device which actually counts the number of radio active particles passing through a specified area and while this circuit does not actually count, […]
Simple Intercom Circuit
The most straightforward form of intercom circuit would be to use a microphone feeding an amplifier which in turns feeds a speaker at the other end. When the remote end […]