Sistem Digital

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: