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Judul : Rangkaian Counter Up|Down Dengan seven segment

Rangkaian Counter Up|Down Dengan seven segment

Counter up/Down Dengan seven segment Desimal

This circuit can be used for many purposes. Applications ranging from simple bottles in the belt, display a number in the queue physician practices, the timer display for competition pool, until a little complicated to show the amount of rotation in one minute lap machine.

Important components in the Circuit is the following simple counter 74LS192, and have display driver IC 74LS47 (BCD to 7 segment driver) and the indicator 7 segment LED display common anode. In fact there are other census, such as 4-bit binary counter which can be up to 16 tattoo, but here is the census that is used 10 (decade counter) would be made because the tool is the census decimal.

Main component is an IC 74LS192 up / down decade counter, which is a component that can make a census to 10 (0 to 9) up and down. Component 16 is quite a lot of pins can be found in electronics parts stores. 74LS192 built with some of JK flip-flop and gate-gate logic. Logic transition from 0 to 1 (Low to High) at the UP pin (pin 14), the output BCD (binary code decimal) QA, QB, QC and QD Ascending 1 digits.

Similarly if there is a logic transition on the 0 to 1 DN pin (pin 4), the BCD output down 1 digit. It is a good idea if you explained a little about the rules of the BCD, as there is on the table. This is shown in the table 4-bit binary code QD .. QA-me representasikan code decimal from 0 to 9.

So that can be understood by those who view it, binary code is converted to a 7-segment LED drive by using the IC 74LS47 component. Thus, this Circuit can display the corresponding decimal number. This Circuit is used in the 7 segment LED Anoda Common, where all anoda of each LED segment is connected to one and the Vcc supply. To turn one segment, 7 segment LED pins that must be sinks (short) to ground through a resistor. Resistor that is used is 100 Ohm, and this is enough light to light this LED segment.

Skema Rangkaian Counter up/Down 7 segment Desimal

IC 74LS192 also equipped with a CO output pin (Carry Out) and BO (borrow Out) that each is normally high and work separately. Decimal output transition from 0 to 9 (counting up) will trigger pin CO-issued credit 0 to 1 (Low to High). On the transition from decimal 0 to 9 (counting down), a trigger pin BO-issued credit 0 to 1. Thus, the two outputs can be used as a clock trigger level for the next census. As an example in the Circuit-1 below, 2 units in the IC 74LS192-Cascade to make a census of tens of value and unit. Readers can easily stay on if the census level necessary to create value for the next hundreds, thousands and so on.

Rangkaian Couter Desimal of census work if akan CLR pin = 0 (low). For the input port RESET must be given in the ground or logic 0 in normal circumstances. Reset (display shows the decimal number 0) applies if the CLR pin (pin 14) is a transition from logic 0 to 1. Similarly with the pin and pin UP DN, akan work (counter rise / down) only if there is a transition from 0 to 1 on this pin. Readers need to add aCircuit of switch (key) to a trigger-counter (up / down) and Reset.

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