| On the Internet you can find them in all shapes and sizes: circuits to test remote controls. Here we describe a simple and cheap method whic...
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| A brief tour of the World Wide Web clearly shows one of the problems facing many electronic enthusiasts: the enclosure. All too often it’s a...
| A noise generator with a wideband output signal is always handy to have around when you’re adjusting receivers and other types of HF equipme...
| Chip manufacturers are always coming up with ever more sophisticated constant current driver chips for LEDs. We have included this design fo...
| How can you find out how stable a lab or benchtop supply is? You can get a good impression of the stability of a power supply under various...
| The PWM power stage discussed in the previous instalment (June 2009) can be used perfectly well on its own. But a matching preamplifier with...
| When you want to mount components on a PCB or a piece of prototyping board, you not only want to do this quickly, but also tidily. The bendi...
| The circuit described here and its accompanying BASCOM software arose from the need to control the temperature in a laminator. The laminator...
| This circuit allows a cheap or discarded wireless doorbell set (i.e. transmitter and receiver unit) to be used as a remote emergency stop on...
| There are plenty of designs for simple audio power amplifiers. These generally have a class-AB or class-B topology. Here we present a very c...