This simple circuit with two transistors was found in a 1985 publication. The power can come from batteries or battery, as consumption is very low.
This low current source uses some components that are hard to find in ours. The transformer is a...
This power supply provides 12 and 24 V voltages for experimental FM stations. The total current...
This stabilized source can supply currents up to 700 mA and the output voltage is close to 15 V. a...