| What do capacitors have in common with wires in water or fingers touching metallic surfaces? Quite a lot. You can use skin impedance for a v...
Burkhard Kainka (212)
| This very private AM station enables you to receive the good old BBC by Internet radio and rebroadcast it inductively on medium wave. Just l...
| If we only used electronics to process existing signals, we would be missing an important aspect of electronics: generating oscillating sign...
| Here’s a quick primer on sending data over the SPI bus from one microcontroller to another. The data is this case consists of 10-bit reading...
| An extremely basic oscilloscope is better than none at all and sometimes it’s more important that the device is very small, standalone and e...
| You occasionally see advertising signs in shops with a blinking LED that seems to blink forever while operating from a single battery cell....
| Hall sensors can of course be purchased but making them yourself is far more interesting (and satisfying)! According to the theory the cruci...
| In days gone by a radio amateur always had a dip meter close to hand in his ‘shack’. Now that people can afford oscilloscopes, the poor old...
| Anyone who designs, builds, or repairs radio receivers can make good use of a small AM signal generator. With a suitable signal waveform, yo...
| The WSPR (Weak Signal Propagation Reporter, pronounced ‘whisper’) radio transmission technique was developed to enable considerable distance...