| The Conrad Electronics company has a light flash stroboscope kit in its product line (number 580406) which can be easily expanded with an el...
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| How often does it happen that you close down Windows and then forget to turn off the computer? This circuit does that automatically. After W...
| In the past, a lot of space in hobby rooms and work stations was taken up by an instrument in a large case with a small screen, but now many...
| These days, transmit- and receive modules that operate on the well-known 433-MHz licence-free frequency are reasonably cheap and freely avai...
| In the first part of this article, we described all of the circuit boards. Now it’s time to look at how they fit together. We first describe...
| In recent years the LED has seen many improvements so that we see them fitted in more and more situations where filament lamps were traditio...
| In order to connect the open-collector output of a standard Conrad DCF receiver module (order number 121177), which has a relatively low ope...
| This circuit, designed for audio applications, allows the user to select which input signal will be enabled when the system is switched on....
| Only simple materials and a little bit of skill are needed to build an RS232 switch. All that you need are two 9-way sub-D plugs with solder...
| It is often desirable to know how hot a part is. The usual method is to use a thermometer to measure the temperature, but this may not alway...