An ultra-low power sensor operates using energy harvesting from various sources for efficient monitoring. The oscillator ...

The Mostronome is a 1975 electronic metronome that reimagined musical timing with its whistle-like tone. This vintage circuit ...

[Qrp-Gaijin] shows how to do it with a single transistor ... Changing the oscillator topology did the trick. A tuned circuit prevents the oscillator from having sufficient gain at the fundamental ...

One of the first big improvements of this build style is the shift from the originally used spark gap commutator to that of a direct AC drive via a MOSFET oscillator. This improves the primary ...