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.
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
With a touch of switch S1 the motor starts and remains so until a touch of switch S2 turns it off....
The integrated circuit used is no longer common today. The circuit is from Motorola's 1990 Linear...