This is the version of the previous circuit for vehicles with positive ground. The circuit is from a Radio Electronics from December 1976. A siren is included.
This amplifier with complementary symmetry output and good sound quality was found in...
This IR light sensor circuit was found in the July 1992 issue of Radio Electronics magazine. It is...
The resistors R1 and R2 consist of 8 220 ohms x 2 W resistors connected in parallel. The...