Con solo 16 pines, contiene en su interior un contador Johnson de 5 etapas que puede dividir o contar por cualquier valor entre 2 y 9 los pulsos que se ingresan por una de sus entradas, llamada CLOCK reloj. En efecto, si tenemos una etapa de reloj que sea capaz de entregar un tren de pulsos regulares, y los ingresamos por el pin 14 CLOCK del CD , podremos obtener en sus salidas un pulso por cada 2, 3, 4, 5, 6, 7, 8, 9 o 10 que se apliquen en la entrada. Si bien puede funcionar con solamente 5V, se comporta mejor a altas velocidades si se alimenta con al menos 9v. El 74HC tiene la ventaja, dado que pertenece a una familia de chips de alta velocidad, de lograr unos respetables 25Mhz alimentado con 5v.
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And also use to build all kinds of the timer, LED sequencers and controllers circuits. This counts with 5 D-type flip-flops. Decoding and control are by 16 inverters and 15 gates.
Pin 16 is a positive power supply and pin 8 is a ground. The power supply range of 3 volts to 16 volts. And Maximum power supply voltage does not more than 18 volts. Pin 13 has Clock enabled pins to controls the clock. Pin 14 is the clock triggers one count. The counter will count on the positive-going clock signal. Pin 15 is the reset pin. Pins and are the decoded output pins. The active count pin goes high and all others remain low. Pin 12 is Carry output, for the clock input of an additional counter or an external circuit that the count is complete.
How it works I want to see you improve in Electronics learning, can use CD well. Here is step by step a process that I think simple for you. Meet basic frequency divider If we feed a frequency of 10Hz to the input pin Then, it is equally divided between the 10 outputs. We see that this chip can divide the frequency by If you want a real using this function, other frequency dividers. You should read below. It can drive an LED. This buffer gate inside the IC.
It does not involve external circuits. And this falling waveform is also internal. The Cycle on its input indicates it receives a low during quiescent conditions. And, changes to this low state on the falling edge of the waveform.
Control Pins Look at Figure And learn with me. So, we must connect them to either high or low. We cannot leave floating them. Reset Pin First, when the reset pin connects to a low voltage Vss.
This IC will count the full 10 outputs. It will reset the IC to the first status. It is the output pin number 3. And if we keep the reset pin is high, the counter will still at pin 3. The IC will count the full 10 outputs.
As shown above. In contrast, we connect it to a high status. The counter will freeze on or restrain the output in operation. In short, we often connect pin 13 to ground. Make stability control pins We should add R1 and R2 the K to 1M resistors to keep spikes from entering the control pins. While at the same time gives the pin a high impedance path to any control voltages. Because no current is flowing.
And, so no voltage is across the resistors. Do N frequency divider What is more? We back to learn how the CD will divide by 9 or 8 or 6 or 5 or 4 or 3 or 2. See below Divide-by-9 Circuit Are you get ideas? See next… We connect the output number 10 to the reset pin. This will make the counter count to 9 then reset.
Divide-by-six Circuit Then, we connect 7th output to the pin 15 reset. Also, it will the counter count to 6 then reset. Divide-by-N A divide-by-N. This circuit is helpful for add divisions or for a circuit requiring easy alteration.
Read also, you will get more ideas Do you love it? Read next… How to Cascade the counter We can cascade two or more counters to produce a counter. See the circuit diagram, we use two Ideally, it can be a pre-set counter in which the outputs are diode gated to a signaling device such as a lamp or bell.
We arranged the circuit to create a forward reading display and any number of chips. And we can add to increase the range.
Then, the carry-out pin 12 connects to the clock in the next counter. And, the reset and clock inhibit pins must connect to ground Vss. The advantage of including the K resistors allows a simple push-to-make switch. Which, it is an integrated digital circuit CMOS. Then, use the 9V power supply. For a signal input continue the circuit can produce general frequency may use IC NE all right.
LED Chaser circuit using and If you would like to learn basic digital. But it is difficult and boring.
It used in computer games and in many scientific and mathematics applications. So it is best for a beginner or for kids to learn digital. Also, my son loves them. The project may be good choice of yours. This is a two ways of LED running lighting. A green one and a red one, alternatively.
You can use a different color for this. Continue Reading To Look at more detail. I think this circuit may on the same wavelength you certainly. When we feed a signal clock at 14 pins.
It causes the position logic at a pin output. From 0 to Please see the circuit picture will understand increasingly.
Almost forget integrated number this circuit, requires low voltage 3V to 15V power supply. No microcontroller is so easier and cheaper! It includes a few parts, normal electronic circuits. And, has the important parts are reed switch detect a magnetic force to CD It is a Decade counter with 10 decoded outputs IC.
Then connected to Optocoupler 4N26, and display to a frequency counter. Which uses the principal of light-activated in a day with sun. Electronic dice circuit using CD Which looks like real dice. We use only the press switch being thrown. With 6 LED Display. Create an integrated LED flashing to the rhythm.
And then stopped at one of the LEDs. Enjoy creating a game. And knowledge From digital ICs. And has the sound effect generator with adjusting tone music with a tempo slow-fast as you want it to VR And VR1-VR10 to adjust the tone according to need more than tone. LED Dancing light circuit with Music The main features are running light by changing the voice of the tiny microphone. In the circuit, we use to drive 10 LED display.
And, LM is a preamplifier and signal converter. With a few general devices.