Power Bipolar Transistor, 2A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-202, Plastic/Epoxy, 3 Pin, PACKAGE-3

GP BATTERIES GP15G-U4 Battery, Greencell, Pack of 4, Zinc Chloride, 1.5 V, AA, Raised Positive and Flat Negative, 14.5 mm

IMO PRECISION CONTROLS CS20A-U4 Rotary Switch, Rotary Cam Series, Non Illuminated, 20 A, 690 V

GP BATTERIES GP24G-U4 Battery, Ultra, Pack of 4, Zinc Chloride, 1.5 V, AAA, Raised Positive and Negative, 10.5 mm