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 . 74LS 8-bit Parallel In/serial Output Shift Registers. This device an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked.

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In this tutorial, I am going to show another shift register which is capable of expanding input pins. Besides, you want to stop reading the inputs while serially sending the output.

This gives you a flexibility when to read the input to the shift registers. January 11, at Last but not least, a video demo showing datasheeet operation of 74HC Shift Register. Very nice But, with two 74hc cascade case, how would be the code for dahasheet case??

Another thing that you can try is, first make sure you read what is exactly send from the shift register. Hey zxlee, great article, It helped me a lot.

June 11, at Notify me of new posts via email.

8-Bit Parallel In/Serial Output Shift Registers

Dear Object means the instrument which is a digital keyboard for music playing and its display lcd is not available and its very much important to me, its my first keyboard therefore I want to get the display data or display screen of the instrument on arduino lcd. 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. November 27, at 9: This will stop the circuit being unreliable especially as you chain more chips.


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74HC 8 bit Parallel in/Serial out Shift Register – Zx Lee

You are commenting using your Facebook account. Next, you need to send the clock pulse to the shift register in order to obtain the serial output.

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June 27, at 9: The input pins of the shift registers are pin 11 to 14 D0 to D3 and pin 3 to pin 6 D4 to D7. Email required Address never made public. One of the advantages that need to be stressed on is that by using only four pins, I can get eight input pins.

Now I know that it is better if we can include a 0. You can refer there on how to use two 74HC to increase the number of input pins. December 19, at J Dacampo November 27, at 9: December 1, at 8: Hi Maria, sorry for the late reply.

74LS165 Datasheet PDF

You can can also change it into pull down resistor network connection. Create a free website or blog at WordPress. Notice that I am using a pull up resistor of 10k ohm on all the inputs. Why have you left out the decoupling capacitors? To find out more, including how to control cookies, see here: Blog Statshits. James July 31, at 5: December 30, at 4: After discussing about the input and output pins, let us move on with the control pins.


Thanks for the kind words. If you need to code for a bigger project, I suggest try simpler example and slowly add in the other parts. Join 1, other followers. Recently I just updated the Arduino Piano project, https: If you would like to cascade 74HC, the only modification you need to make is add the number of shiftIn depending on how many you are using.

The input voltage acceptable range is between GND to Vcc, where maximum allowable voltage for Vcc is 7V according to the datasheet. Fill in your details below or click an icon to log in: Thanks for your kind reply… See I have followed you and understood your line 39 to 51 is printable characters.

As I have given lcd. November 19, at 2: 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. Change the code to display it using your serial monitor. To control the shift register, you would need three pins which are parallel load input PLclock input CP and clock enable input CE.

January 11, at 9: Another pin that is useful especially when you want to cascade a few shift registers together, which is Serial Data Input DS.