Found in a Popular Electronics from the 90s, this circuit generates signals from 2 Hz to 30 kHz in different bands. The circuit can be powered by voltages from 5 to 12 V, depending on the application.
We find this efficient emergency lighting system in a 1987 publication. The circuit keeps a...
We found this circuit in a 1976 documentation. The FET can be the BF245 and the bipolar transistor a...
The shunt type regulators are connected in parallel with the load, deflecting the current to...