Thread starter 1 I have seen various threads with TTL requests regarding how to and build a TTL clock or counter with discrete components.
Just type and press 'enter' Search for: The IC CD is a 5 stage Johnson decade counter with decoder and is mostly used in digital displays. The decoder helps in converting the Johnson codeto a 7 segment decoded output. Thus, the input signal will be converted to numeric digits and will be displayed on the LT display.
This IC can be used in display circuits and also in clocks, timers and so on. You may also like: While using the IC make sure that you use it alternatively, as it is highly sensitive to static change, and a small touch at the input terminal would be more than enough to start the counter circuit.
For each pulse the out put of CD advances by one count. Pin 2 is the Clock Inhibit pin and should be grounded while the counter is incremented by one value for each pulse. They are used to improve the readability of the digits. Pin 8 is the GND pin. Pin 14 is the Lamp Test pin and is used to check if all the seven segments are properly working.
Pin 16 is the Power pin and should be connected to the 5V DC supply.
Pin 5 is the Carry Out pin and as the name says it carries out a 10 clock input cycle 0 to 9. Pin 15 is the Reset pin and must be kept LOW to reset the counter from 9 to 0. Switch S1 is used to initiate the counting.
As soon as the switch S1 is pressed, the clock input pin receives the pulse and increments the counter by 1. After counting till 9 the display again shows 0.
Diode D1 prevents the risk of accidental polarity reversal.Accurate, versatile chemical metering pumps Delivering flow rates that remain constant right up to 7bar Qdos peristaltic chemical metering pumps give users a . Metrology-grade HP/Agilent/Keysight A 8½-digit DMM repair teardown and worklog.
General-purpose PowerPC processors IBM/Motorola PowerPC family. 50 and 66 MHz; consumer products (multiplexed data/address bus); /e/ev notebooks, embedded devices; /e/ev workstations and low end servers; the first bit implementation; PowerPC 7xx family.
/ () – MHz; Motorola/Freescale PowerPC 7xx family. PowerPC and . This CD IC combines the low quiescent power dissipation and high noise immunity feature of CMOS with NPN bipolar transistor, which is capable of giving output current of 25mA.
Seven Segment Counter Display Circuit Description. Here is the circuit diagram of a seven segment counter based on the counter IC CD This circuit can be used in conjunction with various circuits where a counter to display the progress adds some more attraction.
This CD IC combines the low quiescent power dissipation and high noise immunity feature of CMOS with NPN bipolar transistor, which is capable of giving output current of 25mA.