This device is an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked. Parallel-in access is made available by eight. Texas Instruments 74LS Counter Shift Registers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments . Product data sheet. 1 General description. The 74HC; 74HCT are 8-bit serial or parallel-in/serial-out shift registers. The device features.

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To control the shift register, you would need three pins which are parallel load input PLdatasehet input CP and clock enable input CE. However, you would need to set the clock enable before clocking out the data.

Create a free website or blog at WordPress. July 31, at 5: Notice that I am using a pull up resistor of 10k ohm on all the inputs.

The input pins of the shift registers are pin 11 to 14 D0 to D3 and pin 3 to pin 6 D4 to D7. Notify me of new comments via email.

74LS164PC, 74LS164RPEL, 74LS165

Moreover, it can be cascaded, thus you can have any amount of input pins with only four pins with the help of this shift register. Last but not least, a video demo showing the operation of 74HC Shift Register.


Fill in your details below or click an icon to log in: You need a 0. From my understanding, you have the buttons well connected to the shift register and the output of shift register is also connected to the Arduino. Now, let us look into detail how to use the shift register.

June 11, at After discussing about the input and output pins, let us move on with the control pins. Besides, you want to stop reading the inputs while serially sending the output. January 11, at 9: Blog Statshits. If you are using other display, you may need to change to code for the display. 74,s165 are commenting using your WordPress. Change the code to display it using your serial monitor.

Thanks for your kind reply… See I have followed you and understood your line 39 to 51 is printable characters. ShiftIn data,clock,order — The data is the input pin on Arduino to read the output from shift register whereas the clock is the pin connected to shift register clock. January 8, at 7: Follow this blog Enter your email address to follow this blog and receive notifications of new posts by email. Join 1, other followers.

December 30, at 4: This gives you a flexibility when to read the input to the shift registers. November 27, at 9: December 1, at 8: Now I know that it is better if we can include a 0. James July 31, at 5: Build your own Arduino Uno. Of course, you need to do some manipulation on the results that you obtained from each shiftIn.


To cascade between two 74HC shift register, all you need to do is to connect the Serial Output Pin 9 of first stage into Serial Input Pin 10 of the second stage. You are commenting using your Twitter account.

If you need to read the inputs to shift register and display it on your HD using Arduino, the code provided above would work for you.

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Notify me of new posts via email. Next, you need to send the clock pulse to the shift register in order to obtain the serial output. To find out more, including how to control cookies, see here: This site uses cookies. A summary of the shift register operation is shown is the timing diagram below. Recently I just updated the Arduino Piano project, https: Hey zxlee, great article, It helped me a lot.

Why have you left out the decoupling capacitors? Thanks for the kind words.

In this tutorial, I am going to show another shift register which is capable of expanding input pins.