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I just want to know the right way to connect the output pins of to the pins of 7-segment display? Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

How to connect decoder to 7-segment display?

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Each segment on a 7-segment display is designated a letter A-G. Would you like to answer one of these unanswered questions instead?

You need to tie them to appropriate logic levels RBI should be ‘0’ if you want to display a zero. Home Questions Tags Users Unanswered.


SN Datasheet(PDF) – TI store

Simply wire the respective letters a. Danny Sebahar 9.

The pinout is here: Thank you for your interest in this question. Then just map the pins correctly again, from datasheet: However, they don’t seem to mention that you need to have the inputs of the connected to something for it to work like you want it to. By datazheet our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display. This is standard and is shown eatasheet the SN datasheet:. Spehro Pefhany k 4 Then just map the pins correctly again, from datasheet:.

When I connect an input, the LEDs doesn’t form numbers but they light up randomly. Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Pin 5 should go to GND.


Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. Armandas 6, 1 23 Note that this datasheet illustration is a bit messed up and the bottom segment is D not Eand next segment clockwise lower left is 7474n.

Multisim and Ultiboard

The pinout is here:. Here is a link to a video I made on instagram of mine working using this schematic: Michael George 1, 8 34 I’ve connected a decoder to 7-segment display as shown in figure.

This is standard and is shown in the SN datasheet: Note that this is an ancient display and an ancient TTL chip both are museum old and because it’s TTL open inputs will read as ‘high’.