This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
This oscillator for Morse code training was found in a Popular Electronics from the 90s. The...
This circuit was obtained in a Popular Electronics of the 90s. The circuit can be assembled with...
Found in an Electronic Design, this small power source uses a battery as a voltage reference,...