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The pinout is here:. Thank you for your interest in this question.
Simply wire the respective letters a. 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. 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’.
7447j Here is a link to a video I made on instagram of mine working using this schematic: Armandas 6, 1 23 You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display. When I connect an input, the LEDs doesn’t form numbers but they light up randomly.
This is standard and is shown in the SN datasheet:. Each segment on a 7-segment display is designated a letter A-G. You need to tie them to appropriate logic levels RBI should be ‘0’ if you want to display a zero.
Further, this really old chip saved a few transistors by not fully decoding inputs above 0x09, so 0x0A. The pinout is here: Then just map the pins correctly again, from datasheet:.
Octal to 7-segment LED decoder – Discussion Forums – National Instruments
7474n This is standard and is shown in the SN datasheet: Home Questions Tags Users Unanswered. Would you like to answer one of these unanswered questions instead? 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. Pin 5 should go to GND.
Michael George 1, 8 34 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.
Danny Sebahar 9. How to connect decoder to 7-segment display?
SN Datasheet(PDF) – TI store