Spec-Mate Component List 1x 2764 8K EPROM 1x 74121 Monostable Multivibrator DS 2x 74LS32 Quad 2-Input OR Gate DS 2x 7425 Dual 4-Input NOR Gate (with strobe) DS 1x 74LS00 Quad 2-Input NAND Gate DS 1x 74LS20N Dual 4-Input NAND Gate DS 1x 74LS74AN Dual D-Type Positive-Edge-Triggered Flip-Flop DS 1x 74LS04 Hex Inverter DS 1x 2.2u 50V 1x 10u 25v R1 brown black red 1K R2 green brown brown 510R R3 brown black orange 10K R4 brown brown red 1K1 TR1 2N2222A