Using an LDR, this Philips circuit directly activates a relay when light strikes the sensor. The relay is 45 V with 20k coil resistance. The 220 nF capacitor must be polyester for 400 V.
The L coil of this receiver determines the received waveband. The circuit is from a 1963...
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The L78xx is equivalent to 78xx...
June 2016 - It can be obtained from Mouser Electronics this new chip for motor control, motion,...