This 100 second timer was found in the September 1992 issue of Radio Electronics magazine. The circuit has two timing ranges and time adjustment at R6.
This circuit from a Japanese publication in 1968 uses germanium transistors from the time like the...
This circuit is intended for the testing of junction FETs, providing several reading options...
Place the lamp on the ignition threshold via R2. Your approach causes it to light up. The secret is...