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Home Questions Tags Users Unanswered. When I connect an input, the LEDs doesn’t form numbers but they light up randomly. Then just map the pins correctly again, from datasheet:.

This is standard and is shown in the SN datasheet:. Then just map the pins correctly again, from datasheet: The pinout is here: I’ve connected a decoder to 7-segment display as shown in figure. Spehro Pefhany k 4 Thank you for your interest in this question.

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’. I just want to know the right way to connect the output pins of to the pins of 7-segment display?


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

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. Would you like to answer one of these unanswered questions instead? You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display.

How to connect decoder to 7-segment display? You need to tie them to appropriate logic dataeheet RBI should be ‘0’ if you want to display a zero. Each segment on a 7-segment display is designated a letter A-G. Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A.

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. Michael George 1, 8 34 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

Pin 5 should go to GND. Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: Danny Sebahar 9. The pinout is here:. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Here is a link to a video I made on instagram of mine working using this schematic: Simply wire the respective letters a.

Armandas 6, 1 23