Sistem Digital

Flip-flop is a digital chain that is used to store one bit of semi-permanent until there is a command to delete or change the contents of the stored bit.Basic principles of the flip-flop is a basic component electronics such as transistor,1. Save the binary number 2. Tattoo 3 credits. synchronize a series of arithmetic

praktikum in this we can use the tool and materials:
1. Digital Trainer kit
2. Tools Kit (Long Nose and Tang pieces)
3. A TTL IC-K Flip-Flop (7473) 4. Cable jumpers secukupnya

Flip - Flop has many types such as RS flip - flop, JK flip - flop, JK flip - flop with preset and CLEAR, D flip - flop and Master-Slave flip - flop, but is more often used are:

A. RS Flip - Flop

Have two terms in use, namely: its output is input into the other, and the output should be more than satu.Flip RS-flop is a series of basic of all types of flip-flop that is.There are various series of RS flip-flop, in this experiment RS flip-flop is arranged from the four 2 input NAND gate. Two input flip-flop is the S (set) and R (reset), and the two are keluarannya Q and Q '.


-> Diagram RS


-> Tabel Kebenaran



B. JK Flip - Flop
JK flip-flop was a refinement of the RS flip-flop, especially to overcome the oscillation problem, namely the presence of feedback, and problem conditions prohibited.on the condition of J and K inputs berlogika 1, that condition will make the output to be at variance with the previous output condition or known by the term Toggle.
-> Diagram JK

Cable scheme JK



First install the IC in the bread board, then connect the switch and the IC cables available, connect the IC to the ground, 5V power input, and also output to LED. Input A is connected to the leg 14,
input clock connected to the foot 1, K input is connected to the foot 3, Voltage / VCC is connected to the foot 4, D / CLEAR worth 1 to 2 feet on the IC 7473.

Truth Table:

Census / Counter is a series of logic penggurut / meter, is also a series of census sekuensial logic that is used to calculate the amount of credit granted on the entry. Counter used for various arithmetic operations, the frequency divider, the distance (odometer), the speed (spedometer), a development application in wide use in the calculation of scientific instruments, industrial controls, computers, communication equipment, and so forth.

Tools and materials that can be used, namely: Digital Trainer Kit, Til Countr IC (7490), cable jumpers
census is used to calculate the number of tap in the balance of available time (measurement frequency), to divide the frequency and store data and can used in continuity address in several series of arithmetic.

The global census has important characteristics, namely the amount of the maximum count (census modulus), count down or up. Counter Syncronus and Asyncronous counter. Differences in the two types of this census is on pemicuannya. On Syncronous counter pemicuan flip-flop done simultaneously (triggered by a clock source) stacks parallel flopnya-fold. Asyncronous while on the counter, there is at least one of the flip-flop the clock is triggered by the output flip-flop, or from another source clock, and the order of flip-flopnya series. By manipulating the connection based on the flip-flop or a map karnough timing diagram can be produced by a random counter, shift counter (counter as a function of the register) or the up-down counter counter.Penerapan application is in the form of both chip IC IC TTL, or CMOS, are : (TTL) 7490, 7493, 74190, 74191, 74192, 74193, (CMOS) 4017,4029,4042, SN 7454 or SN 7474, and others.

Next image from the basic concept of a census of which the output Q of a flip-flop is connected to one input A clan K Flip-Flop on the other ........
Before the census began, all the Flip-Flop must reset first, then all Q = 0, All input A clan is also a K = 0, except Flip-Flop (1), at the time of tattoo began all input A and K = 1 should be valued.

Census binary



Cable scheme: