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Armandas 6, 1 23 Michael George 1, 8 34 By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. This is standard and is shown in the SN 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. 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.

74LS47 IC | 74LS47 Datasheet | Pin Diagram & Description

Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: I’ve connected a decoder to 7-segment display as shown in figure. Further, this really old datashwet saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

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How to connect decoder to 7-segment display? 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 747n will read as ‘high’.

Danny Sebahar 9. Thank you for your interest in this question.

Multisim and Ultiboard

When I connect an input, the LEDs doesn’t form numbers but they light up randomly. Spehro Pefhany k 4 Home Questions Tags Users Unanswered.

Then just map the pins correctly again, from datasheet:. 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. I just want to know the right way to connect the output pins of to the pins of 7-segment display?

Then just map the pins correctly again, from datasheet: Pin 5 should go to GND. Here is a link to a video I made on instagram of mine working using this schematic: Each segment on a 7-segment display is designated a letter A-G. The pinout is here: You need to tie dataseet to appropriate logic levels RBI should be ‘0’ if you want to display a zero.


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

Octal to 7-segment LED decoder – Discussion Forums – National Instruments

The pinout is here:. Simply wire the respective letters a. Would you like to answer one of these unanswered questions instead?