Updated : Feb 16, 2020 in Music


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Michael George 1, 8 34 Armandas 6, 1 23 Home Questions Tags Users Unanswered. 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.

Like the other two most popular answers, your 7 segment display needs to be connected to the properly Outputs to Seven-segment display inputs: 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.


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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Then fatasheet map the pins correctly again, from datasheet: You need to tie them to appropriate 7447n levels RBI should be ‘0’ if you want to display a zero. Danny Sebahar 9. Here is a link to a video I made on instagram of mine working using this schematic: The pinout is here: I’ve connected a decoder to 7-segment display as shown in figure.

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

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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? When I connect an input, the LEDs doesn’t form numbers but they light up randomly.

Spehro Pefhany k 4 This is standard and is shown in the SN datasheet: 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.


Each segment on a 7-segment display is designated a letter A-G. This is standard and is shown in the SN datasheet:. Then just map the pins correctly again, from datasheet:.

74447n You can use a diode tester or a simple voltage source and a resistor to determine the pinout of your particular display. The pinout is here:. Further, this really old chip saved a few transistors vatasheet not fully decoding inputs above 0x09, so 0x0A. Thank you for your interest in this question. Would you like to answer one of these unanswered questions instead?

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’.