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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’.

Simply wire the respective letters a. How to connect decoder to 7-segment display?

Note that this datasheet illustration is a bit messed up and the bottom segment is D not Eand next segment clockwise lower left is E. 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.


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Each segment on a 7-segment display is designated a letter A-G. The pinout is here: This is standard and is shown in the SN datasheet:.

Here is a link to a video I made on instagram of mine working using this schematic: Would you like to answer one dataaheet these unanswered questions instead? When I connect an input, the LEDs doesn’t form numbers but they light up randomly.

Home Questions Tags Users Unanswered. You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display.

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Thank you for your interest in this question. Spehro Pefhany k 4 Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

This is standard and is shown in the SN datasheet: Armandas 6, 1 23 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.


I’ve connected a decoder to 7-segment display as shown in figure. Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Michael George 1, 8 34 You need to tie them to appropriate logic levels RBI should be ‘0’ if you want to display a zero.

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The pinout is here:. I just want to know the right way to connect the output pins of to the pins of 7-segment display? Danny Sebahar 9. Then just map the pins correctly again, from datasheet:.

Then just map the pins correctly again, from datasheet: Pin 5 should go to GND.