Harwin Mainheader EN 728x90 April 2025

Gert Baars (67)

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| Traditionally, building a radio receiver is among the more rewarding electronics projects. This receiver is based on an MK484 IC for the AM...

| Want to experiment with radio reception in the medium-wave (MW) band? This receiver, which is based on an MK484 IC for the AM detector, oper...

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| For aircraft enthusiasts and in particular plane spotters, it’s always interesting to listen to communications between aircraft and control...

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| This end-fed or “Zepp” or “J-Pole” antenna provides excellent results in combination with the scanner for the aviation band (108–137 MHz) de...

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| Small robots are eminently suitable for experimenting with various possibilities for generating movement. Particularly when a number of legs...

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| This circuit is for a superheterodyne receiver where the image frequency is suppressed without the use of an input filter. Instead, it uses...

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| Crystal filters are often used for IF filters in receivers, where the bandwidth of this filter largely determines the selectivity of the rec...

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| Fabricating printed circuit boards is not something that every electronics hobbyist does for themselves. It is, however, not really that dif...

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| When the position of a servo can be controlled via a voltage, it can be implemented via a potentiometer acting as a voltage divider. However...

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| With a bit of adeptness, you can build an electronic scales based on a servo motor. Depending on the type of servo you use, it can measure w...