This continuity test was found in a 90s Electronic Engineering. Transistors are types of general use of the time with equivalents such as BC548 and BC558.
Suggested by Philips in 1966 documentation, this limiter can be found elsewhere on this website....
March 2017 - Microchip's new 8-bit PIC16F15354 microcontrollers can now be obtained from Mouser...
This circuit was obtained from a Poptronics in June 2001. The magazine no longer exists, but the...