This simple power supply, which is equivalent to 2 AAA or AA batteries, was found in an Elektor from the 90's. The transformer has a 4.5 V secondary with a current of 50 mA or more.
Mouser Electronics is announcing the availability of the new voltage regulators with low dropout...
This circuit is from a 1982 publication but can be assembled with BF245 for Q1 and BC548 for Q2....
This circuit was found in documentation from the 1970s. It eliminates contact bouncing, providing...