With an 18 V input, this regulator was found in Philips documentation from the 60's. The transistors are from that time. The power transistor must have a heatsink.
This circuit is from an American documentation from 1954 and is indicated for use in toys with a...
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...
In the figure we have a security system consisting of a sophisticated alarm found in a 90s edition...