Their benefits are such that it’s become surprisingly rare to see a traditional linear power supply with a mains-frequency transformer and rectifier circuit, so [ElectroBoy]’s dual voltage PSU ...

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

Poking around in a transformerless-powered device can turn your oscilloscope ... part of the circuit can be at mains voltage. Now read on to see why! A transformerless power supply (TPS) is ...