| In the second episode of this series we described and energy-efficient relay with a few interesting characteristics. Here the authors elabor...
More about circuit (745)
| This is a submission from electronics service provider Eurocircuits. The company is presenting itself at embedded world with the trade fair...
| Have you ever wondered what an infrared remote control sounds like? With this small circuit you will be able to find out!
| Legions of dog whistles are available from pet shops and by mail order. But with only a few parts you can easily build one that yourself!
| After the previous episodes about (ancient) radio techniques, we now return to a very house and garden, or more specifically, kitchen circui...
| Last week we tempted you with a preview of the reflex receiver; in this instalment we will continue to develop this idea.
| In the previous instalment we looked at the simplest possible radio receiver: the diode receiver. And in order to tickle a little bit more s...
| In the past, radio had something ‘magical’, and that is not all that surprising: you solder a few ‘unsightly’ components together, tie an an...
| Conceded: twilight switches with lots of bells and whistles are available for next to nothing. But isn't it nevertheless much nicer to build...
| Candles are great during this time of the year (these dark days before Christmas), but are also a fire hazard, as we can unfortunately read...