This two-port monostable of the 4001 was suggested by an article in the April 1988 Radio Electronics magazine. The timings are given by C1 and R1.
This complementary transistor stage was found in a 1968 publication. The transistors are germanium types and...
Found in 80's Radio Electronics, this circuit uses an LED to indicate that a battery is being...
Found in Popular Electronics from 1969, this circuit uses a neon lamp from the time that had...