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How to connect a 50-51 segment led bar graph to a 10 segment thermometer circuit?

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novaris04

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let me introduce myself a little before I start explaining the problem I have. I dont really have any experience on electronics or programming but I am able to read some electrical diagrams, pinouts and some idea on ICs, so please bear with me on this.

I need bar graph that lights up according to the temperature inside a computer so I found this website that details how to create one (https://www.circuitstoday.com/led-bargraph-thermometer). At the same time, I need a bargraph of a certain size, 75mm "tall", number of segments is not important.

The design specifies 10 led segments but all of the 10 led bargraphs I found are much smaller in size. The only 75mm bargraph I found are 101 segments. (https://www.aliexpress.com/item/101segment-75mm-led-Bargraph-display-orange/375676989.html)

The design also specifies a temp range of 60-80 deg F, which is 15-26Deg C. What I need is 26 degC to 36 or more.


Question 1. How do I connect an IC meant for 10 leds to a 101 led bargraph? As a last resort, I dont mind assigning 3 leds to the same temp setting, (where groups of 5 leds move together instead of moving one at a time)

Question 2. I don't understand the led wiring of the 101 led bargraph at all. Can someone help me on this?
 
Last edited:
Q1: use 10 individual LEDs as shown. They are available in larg sizes (round and square)
Q2: R7 and R5 adjust the temp reading range, experiment with that
Other: The last sentence in the instruction should read R1+R2=3xR3 (I think). Leave pin 9 open for dot mode and for higher brightness short R8
Good luck! E
 
Last edited:
Q1: use 10 individual LEDs as shown. They are available in larg sizes (round and square)
Q2: R7 and R5 adjust the temp reading range, experiment with that
Other: The last sentence in the instruction should read R1+R2=3xR3 (I think). Leave pin 9 open for dot mode and for higher brightness short R8
Good luck! E
sorry i dont get you for Q1
for question 2, i meant the 17 pins on the led bargraph.
 
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