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.
Rapid Prototyping Boards for 32-bit Applications Include Peripherals, Easy-to-use Interface and...
This relay triggered by voice or by another sound was found in an Elektor from the 90's. The...
April 2017 - The new gate controllers for IGBT SCALE-2 from Power Integrations can now be obtained from...