This 1968 Mullard circuit detects fire by smoke using LDR-type sensors. The circuit makes use of transistors of the time that admit equivalents.
The signal injector illustrated in the figure uses a single integrated circuit and generates...
Motors up to 2 A DC can be controlled by this circuit that we find in the manual for linear...
Place the lamp on the ignition threshold via R2. Your approach causes it to light up. The secret is...