Questions tagged [7segmentdisplay]
A numeric display consisting of seven segments per digit, allowing characters 0 to 9 to be displayed by selecting which segment is on or off. Can have each digit independently controlled, or can be multiplexed to reduce pin count. An 8th segment can be included for a decimal point.
403 questions
9 votes
4 answers
2k views
In a seven segment display, why does my "6" looks like a small letter "b"
I have made this circuit on Proteus, a simple BCD to 7-segment display: But the segments for 6 and 9 are not completely lit. What could be the potential reasons? The decoder IC is CD4511 and a common ...
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1 vote
1 answer
292 views
Controlling 7-Segment Display
I am redesigning the control panel for a project I have been working on. I am using a rotary encoder to replace a set of 3 rotary dials, but I cannot use any microcontrollers or programming. I plan on ...
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4 votes
4 answers
502 views
Current driving a 7-segment quad digit display
This is a followup to my question https://arduino.stackexchange.com/questions/98809/difference-between-using-gnd-and-digital-low-for-7-segment-display-pin which should've been asked here as it turns ...
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0 votes
0 answers
90 views
Converting 1-of-10 Counter Output to Single Pulses
I have a digital clock connected to an MM74C915 7 segment to BCD encoder, which goes into a 74LS42 BCD to 1 of 10 decoder. (Think like a CD4017 but BCD) Need to somehow convert the 1 of 10 output into ...
2 votes
3 answers
494 views
7 Segment LCD Display Common Pins
I have these LCDs “VI-201-DP-RC-S” & “LCD-S401C52TR” This is the first time that I am using LCD displays. When I placed the leads of my multimeter between the common pins, I didn’t measure 0ohm ...
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2 votes
3 answers
151 views
Random increment on button press for a counter using CD4029 and 555 timer
It works well in Proteus (Simulation), but when I implement it, it doesn't work. I'm sure that the hardware connections are correct. Also, the 7-segment doesn't display, for example, the number 2 ...
0 votes
0 answers
81 views
I'm trying to build a counter system (easy one), but the circuit doesn't work
I'm using Proteus to test a circuit before implementing it practically, but it doesn't work. I'm supposed to build a counter that is displayed in a 7 segment display, using a 555 timer. The counter is ...
2 votes
2 answers
118 views
Up counter with 7447
I want to make a counter up to 500 using the 7447, but I have a problem with the displays. When I'm at number 10 (ten), I want "10" to appear and not "010". How can I connect ...
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0 votes
1 answer
90 views
Seven Segment LCD Reflector Type Works
I am a little confused about how the dark segmenets are created in a seven segment LCD. The light is absorbed by the liquid crystals when a voltage applied between the positive electrode/segments and ...
- 853
0 votes
2 answers
138 views
Is it possible to display values from a PRBS7 shift register to three, 7-segment displays (no Arduino or microcontrollers)?
I have a CD4015 lsfr connected to a CD4030 XOR gate, which implements a PRBS7 sequence. My goal is to display the current value of the 7-bit output using the output pins of A and B of the CD4015. I ...
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-1 votes
1 answer
107 views
Adding capacitance to 7 segment display to maintain number output with decoder
I have a 7-segment decoder (SN74LS47N) wired to a 7 segment display. I'm looking for a way for the display to gradually fade out whilst still maintaining its reading for a little while (I don't want ...
- 3
4 votes
3 answers
1k views
How to connect three 7-segment displays to a 4x4 binary multiplier
I am trying to connect three 7-segment displays to show the result. I thought about using the IC 7448 (I could also use the 7447), but I assigned 4 outputs to each encoder (first issue, as I need 3 ...
3 votes
1 answer
317 views
How to drive a 7-segment LCD that has no common anode / cathode using a Raspberry Pico?
I recently acquired a 7-segment LCD, and I am having trouble to understand how to use it. Is it possible to use it with a Pico without any additional hardware? From what I know from my research, LCDs ...
- 31
0 votes
1 answer
131 views
Circuitry for change LCD to 7-segment
My boss bought a TEMP/HUM sensor with LCD display ( just display the digits ). And he asks me to modify product from LCD to 7-segment or LED. Preliminary checking, the original LCD has 4 com and 12 ...
3 votes
3 answers
1k views
How can I use a transistor to control the segments on this 7-segment display?
Pictured here is a 4-digit 7-segment display: Datasheet I'm designing this to have a microcontroller controlling it through a shift register (2, actually). The shift register doesn't have much power ...
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