Module KIT DIY Digital timer circuit kit 74LS192 (MD81)

Module KIT DIY Digital timer circuit kit 74LS192 (MD81)
Digital timer circuit kit 74LS192 electronic kit with simulation DIY training kit

Manfaat : Tujuan belajar merakit KIT elektronik

1 Board size: 75*46mm,
2.Board thickness: 1.6mm,
3.Circuit working voltage: 5V

Circuit description:
In the circuit, IC2A, IC2B and C2, R8, and Rw1 form an oscillation circuit and output a square wave signal. The frequency of the square wave can be adjusted by Rw1.

When it is powered on, pin 1 and pin 2 of IC2A are high and 3 pins are output. Low, C2 has no charge on both sides is low, IC2B's 5 pin 6 feet are also low, 4 pin output high, this high voltage through the resistor Rw1, R8 charge C2, C2 right voltage gradually Rising, after a period of time, the right voltage of C2 reaches the high level condition,

IC2B's pins 5 and 6 become high, and pin 4 becomes a low output. Pins 1 and 2 connected to pin 4 of IC2A become low Level 3, pin 3 output high, C2's left voltage rises to the high level condition, the charge stored on C2 begins to pass R8, Rw1 releases to low level, C2 gradually decreases with the voltage on the right side of charge release,

when the voltage drops After the low level condition, pins 5 and 6 of IC2B become low level, pin 4 outputs high level, pins 1 and 2 of IC2A become high level, pin 3 outputs low level, and charging of C2 starts again. This cycle forms the output square wave signal of the oscillation process.

Square wave signal after IC1D signal shaping, IC2D can be seen as a square wave signal switch, after shaping the signal to the sub-counter 74LS192 subtraction count 4 pin, S1 do square wave signal input switch, when S1 closed, IC2D output The terminal will remain high.