| This device makes it possible to generate beeps at chosen regular time intervals for timing track race training. Each time interval is indic...
More about Circuit (708)
| The big fear of every developer of a microcontroller or computer-driven control system is that the computer or controller could crash while...
| During the past year the author has built a standalone solar panel system, which included the construction of the panels themselves. Such a...
| This issue includes an article on a handy DIY front panel design program called Galva. Once your design is ready, the next question is how t...
| This circuit came about as the result of an urgent need for a NiMH battery charger. No suitable dedicated IC being immediately to hand, the...
| This circuit is for a superheterodyne receiver where the image frequency is suppressed without the use of an input filter. Instead, it uses...
| If you are both an all-terrain biker and handy with a soldering iron, then we suggest you build this musical horn which, apart from the fact...
| This circuit is a tester for flywheel-based ignition systems in small aeroplane engines. Basically the same ignition coils are also seen in...
| This voltage monitor circuit is based on an Elektor design with a 555 timer IC in the book 302 Circuits, which uses two LEDs (red and green)...
| This tester consists of two integrated remote control receivers whose outputs drive an LED to indicate when a suitable infrared signal is re...