This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with modern equivalents. Output transistors may be BD135 and 136 with heatsinks.
This simple Morse Code oscillator was found in a 1980s American documentation. The power supply...
August 2016 - It can be obtained from Mouser Electronics the power factor controller NCP1602 from...
The 4528 is a dual-retriggerable monostable that needs only the timing network formed by R and C...