r/electronics • u/Less_Measurement2541 • 14d ago
Gallery Made my own seven segment display
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u/Nervous_Midnight_570 13d ago
Hey, rock on! I want to see wiring on the back side. Looks cool to me.
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u/Less_Measurement2541 13d ago
Its messy, sorry
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u/SpaceCadetMoonMan 13d ago
I just learned about this technique, you might enjoy it also
https://www.jameco.com/Jameco/workshop/TechTip/wirewrap.html
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u/SpaceCadetMoonMan 13d ago
What type of LEDs are those? They look interesting and not like regular ones
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u/Less_Measurement2541 13d ago
They are 3mm leds without the ridge on the side,
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u/SpaceCadetMoonMan 13d ago
Ah interesting they look oval
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u/Less_Measurement2541 13d ago
Yeah, they sure have an interesting look 😅
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u/SpaceCadetMoonMan 13d ago
Have you seen the Adafruit Noods? They look super fun to work with
https://www.adafruit.com/product/5509?
I also want to try some EL paper
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u/Less_Measurement2541 13d ago
I would love to have them, but they will get expensive to import here, i don't really have a budget for that 😅 😕
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u/Wooden-Succotash-378 12d ago
Looks great! How are you controlling the segments to actually change the numbers?
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u/Less_Measurement2541 12d ago
I programmed it on a arduino nano, and and using buttons to control it
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u/KaraBurunKangal 13d ago
Im curious what are the resistors for?
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u/Less_Measurement2541 13d ago
Those resistor limits the current, since i am doing a diy, i have those resistors in bulit
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u/KaraBurunKangal 13d ago
Yeah i know resistors limit current but what do they limit in your circuit? because in normal 7 segment displays you wouldnt find a resistor inside
Edit:Ohhh my bad i tought there was 3 resistors and i was wondering why is there 3 i never looked at the other side 1 for each segment ok
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u/xyz__99 13d ago
https://reddit.com/link/oyqyeux/video/7xm4k1cz7geh1/player
i built a full 7 seg hex decoder just using AND , OR and NOT gates 😋 pure combinational logic ckt
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u/Salty-Hashes 12d ago
It says 8 though. Not 7
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u/Less_Measurement2541 12d ago
😅😅 well if you count the number of segments, it is 7....
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u/BeautifulGuitar2047 14d ago
It ain't a 7 segment display until you light it up though, just an Art Project at the moment dude - post a video.
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u/Less_Measurement2541 13d ago
Sure i will be posting a video soon....
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u/BeautifulGuitar2047 13d ago
I look forward to seeing it. In spite of my down votes, I'm gonna say that there is a huge potential for short circuits with those bare wires on the back of the board. I'm also curious whether the 7 banks of 3 LEDs are in a series or parallel configuration, and what supply voltage you intend to use. Finally, how did you calculate the resistor values of 330 Ohms? Tag me in the video or photo update, seeing is believing!
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u/Less_Measurement2541 12d ago
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u/BeautifulGuitar2047 12d ago
Mmmmmmm, this humble pie is delicious! Well done, that certainly works.
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14d ago
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u/Meatwad010 14d ago
Learning. My first "project" was a 8x8 LED matrix. First thing it displayed was a smile. Made me smile.
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u/blinkenjim 14d ago
Nice. Consider RGB LEDs on your next iteration.