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Fig, 6. Five counter modules connected together can count? hold and display a total count of 31,

Fig. 1 A. See text generator arrives at the input to Gl, it again drives G1 pin 7 low which causes flip-flop 1 to change state. When this happens flip-flop 1, pin 5, is high therefore the pulse shaper gate is blocked and no more pulses are allowed into the counter. At the same time pin 5 goes, pin 7 is driven negative. These actions cause flip-flop 2 to change state with flip-flop 2, pin 7 going from low to high. The high on pin 7 is applied to pin 2 of G1 which inhibits or blocks its input, therefore the count is now displayed until a reset pulse is initiated. G2 and G3 are connected as a one-shot to control the gate lamp and Dl, the gate lamp driver, This lamp is lit when the pulse shaper gate is enabled (opened) to let pulses into the counter. The lamp stays lit for approximately 200 milliseconds. The flashing gate lamp is an indication that the counter is either ready or is counting depending on the presence of a signal at the input to the pulse shaper.

Gate G4 and driver D2 are also connected as a one shot to automatically reset the total

Fig, 6. Five counter modules connected together can count? hold and display a total count of 31,

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