7‑channel Darlington transistor array with flyback diodes; drives relays, solenoids, steppers, and LEDs from logic signals.
CD4071 CMOS quad 2-input OR gate, 14-pin DIP
CD4072 CMOS dual 4-input OR gate, 14-pin DIP
CD4015 CMOS dual 4-stage static shift register, 16-pin DIP
CD4069 CMOS hex inverter, 14-pin DIP