Product Code : EPW-PECS-0025
Mounted on base, with 4mm color coded sockets, with circuit diagram printed to
explain the principle of triode....
Product Code : EPW-PECS-0026
Mounted on transparent base, with 4mm color coded sockets, with circuit diagram printed
Product Code : EPW-PECS-0027
With photo-sensitive resistor mounted on base as described. Resistance
inversely proportional to light intensity....