| This edition of Summer Circuits differs from our traditional double issue since almost all of the contents are entries to our competition. T...
| This edition of Summer Circuits differs from our traditional double issue since almost all of the contents are entries to our competition. T...
| This edition of Summer Circuits differs from our traditional double issue since almost all of the contents are entries to our competition. T...
| Flashing lights are very much an integral part of the disco scene nowadays. Usually the lights are controlled or modulated in some way by th...
| The following circuit will provide an audible indication of CMOS logic states. Logic `O` is represented by a low frequency tone (roughly 200...
| This simple circuit offers model railway enthusiasts a cheap alternative to the fairly expensive block section controllers which are availab...
| This transistor tester is not intended as a fully-fledged measuring instru-ment; it can be used when a general indication is required of th...
| Although not exactly revolutionary, the circuit shown here is both very cheap and reliable. The well-known 555 timer IC is connected as an a...
| Although not exactly revolutionary, the circuit shown here is both very cheap and reliable. The well-known 555 timer IC is connected as an a...
| Sun I ight is now recognised as an important source of `alternative` energy, and the use of solar panels to convert the sun`s rays into elec...
| Dynamic Noise Limiting (DNL) is a noise reduction system patented by Philips, which is particularly useful for the reproduction of (cassette...