This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and the relay is 12 V sensitive. The time is set to R3.
This circuit was obtained from a Popular Electronics of 1994. The magazine no longer exists in its...
This amplifier uses the LM358, this operational amplifier with excelents characteristics for this...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...