Here are 4 simple 12V power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very ...

LM338 Power supply circuit schematic. 13.8V low voltage transformer components: R1 = 270R 1/4W 2% C4-5 = 10uF 25V T1 = 220Vac/15VAC – 8A Mains Transformer ... 12 comments on “ LM338 12V Power Supply ...

If you build this as a gift – please pair it with a power supply (and label it!). Alternatively – you can add a 12V regulator to your board (about $1-$2 cost) but leave space for a small heatsink.

The following circuit based on the MAX20343H low-noise buck-boost converter shows the typical input and output power-supply levels for a properly operating SMPS device in remote-patient vital sign ...

For example, Tektronix incorporated a switching power supply into a portable oscilloscope in 1966, and RO Associates introduced a 20-kHz switching circuit in 1967, which is regarded as the first ...