| Increase potentiometer frequency control span with a factor of 10 or more by wiring it up differently. This approach can also be used to ext...
RS-elc (31)
| This unusual circuit detects if the temperature of an object has passed a certain limit. A thyristor mounted on the object monitors the temp...
| Transmission up to 1 GHz over a breadboard allows testing without soldering. An example measuring selfresonance of capacitors is shown. This...
| Produces a true random signal using a thermal noise source: a resistor. The output has a predictable noise density, determined by a physics...
| Are you into karaoke? Then this little circuit may be for you. It removes most of the lead vocal from a song without using active components...
| A tiny circuit that removes most of the lead vocal from a popsong (instant karaoke?). Audio examples demonstrate the working of the circuit....
| This device uses changes in temperature to detect airflow but without needing a special sensor. Instead, it uses the temperature sensor buil...
| This circuit detects if the temperature of an object became too high. The thyristor is mounted on the object that has to be temperature moni...
| This simple oscillator uses only four passive components to make a LED blink in the dark. The circuit runs for about two years on two AA bat...
| This detector circuit uses just the Arduino Nano itself, no added sensor. Blowing some air from 30cm distance can be detected. It detects v...