This set includes 27 electric circuit symbol flash cards. BLACK LINE VERSION ONLY. Images saved at 300 dpi in png files. Included are the following electric symbols: AC voltage source, ammeter, battery, buzzer, capacitor, cell, closed switch, diode, electric bell, fuse, ground, inductor, lamp bulb, lamp, led, NPN, open switch, PNP, push button, resistor (2 types), speaker, transformer, variable resistor, voltmeter, wire.This set is also included in Electric Circuit Flash Cards Bundle . If you p