This circuit is from the 80's documentation. The integrated circuit is from the time but can be implemented with modern equivalents. The power supply must be symmetrical.
Found in a PE Hobbyst in 1991, this 13.6 V power supply with a 2 A current is suitable for supply...
This circuit was found in an Electronics World of 1969. Transistors are general-purpose types. It...
This unijunction transistor oscillator is intended for Morse code practice. The circuit is from an...