Burkhard Kainka (226)

| RTL-SDR Blog sticks have been around for a while. They can receive HF signals up to 1,000 MHz or higher. The RTL-SDR Blog V4 is the fourth g...

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| Need to test the equivalent series resistance of a capacitor? Here is a simple solution.

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| Interested in shortwave radio? Check out this simple two-transistor receiver with extremely wide bandwidth.

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| Familiar with PTC fuses? Here is a circuit with two PTC fuses, each designed for 100 mA.

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| Looking for a friendly way to scare away annoying birds? Here's a simple do-it-yourself electronic solution.

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| Let’s take a look at how a neon lamp can be used as a photocell.

| When I first held the HackRF One in my hand, I knew almost nothing about it, except that it is an SDR receiver and transmitter up to 6 GHz a...

| You could say that almost every electronics project is not really complete until it gets its own PCB. Only then can you fully test the conce...

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| You could say that almost every electronics project is not really complete until it gets its own PCB. Only then can you fully test the conce...

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| The following principle applies to ultrasonic sensors. But it also works in the audible range with two piezo transducers.