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74HC74N (Dual D-type flip-flop with set and reset-positive edge-trigger)
and operates in Normal or Power-Down Mode
and 7 works as outputs with PWM (some I/O lines can work in many modes)
Optical (Infrared) Motor Encoder is a speed sensor
5V DC Relay (Songle) is high quality power relay
Solid State Relay Module (1 Channel- 5V) HC 05 74HC74N (Dual D-type flip-flop withIntroduction : This module is capable of switching AC voltages between 100 and 240V at up to a 2A current. The module can be controlled from a 5V Solid state relays, have several advantages over mechanical relays such as It has a longer life, with a much higher turn on off speed and no noise. It also has better resistance to vibration and mechanical shock and better moisture proof performance. It can be switched by a much lower voltage and at a much