4 digit 7 segment LED display differences

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4 digit 7 segment LED display differences

This topic has 4 replies, 3 voices, and was last updated 20 May 2023 at 20:05 by duncan webster 1.

Viewing 5 posts - 1 through 5 (of 5 total)

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20 May 2023 at 11:19 #645962
mgnbuk
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@mgnbuk
Shortly after starting to use a Jingce brand DRO on my mill, one of the X axis display segments failed. The DRO is still usable, but on the "10s" digit the top horizontal segment does not light, so 7 cant be differentiated from 1 without nudging the axis to see how the digit changes.

I dismantled the DRO to get the LED module part number (5461AG ) and ordered some from Ebay but, on arrival, find that the supplier has sent 5641AG modules, not the 5461AG ordered. I have queried this with the supplier and, while awaiting a reply, have downloaded the datasheets for both part number displays. I can't determine the difference between the two items from the data I have been able to find.

I don't want to fit the "wrong" module and risk causing damage, but would rather like to know the difference between the two modules that, as far as I can see, share similar characteristics. Could anyone explain, please ?

Nigel B
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20 May 2023 at 11:19 #32342
mgnbuk
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@mgnbuk
20 May 2023 at 11:42 #645966
Gary Wooding
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@garywooding25363
I tried the AI search engine of Bing, and asked what'#s the difference between modules 5461AG and 5641AG, and got the following response…

According to the web search results, both 5461AG and 5641AG are part numbers for 4-digit 7-segment LED display modules. However, they seem to have different pinouts and wiring schemes. For example, according to the DFRobot1, the 5461AG module is used for evaluation of the KYX-5461AG display, which has the following pinout:

Pin Function
1 Segment E
2 Segment D
3 Decimal point
4 Segment C
5 Segment G
6 Digit 4
7 Segment B
8 Digit 3
9 Digit 2
10 Segment F
11 Segment A
12 Digit 1

According to a forum post on Model Engineer2, the 5641AG module has a different pinout, which is:

Pin Function
1 Segment E
2 Segment D
3 Decimal point
4 Segment C
5 Segment G
6 Digit 4
7 Segment B
8 Digit 3
9 Digit 2
10 Digit 1
11 Segment A
12 Segment F
As you can see, the pins for segment F and digit 1 are swapped between the two modules.
This means that you cannot use them interchangeably without modifying the wiring or the code.
You should use the module that matches your device and application.
20 May 2023 at 12:18 #645970
mgnbuk
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@mgnbuk
Thanks for looking that up Gary,

But your noted pin difference for the 5641 doesn't agree with the device datasheet (manufacturer LightKey) I downloaded from Alldatasheets, which shows pin 10 as Segment F and pin 12 as common cathode for digit 1 – same as the 5461 datasheet (manufacturer Taiwan Oasis Enterprise Co. ).

The 5461 datasheet just has pin-outs & dimensions – no electrical or other performance data like the the 5641 sheet to be able to compare such data.

I had thought initially I had ordered the wrong parts, but the supplier has not sent what was shown on the listing so the onus is on him to sort things out. I won't be fitting the others unless I can be comprehensively convinced that they are directly interchangeable.

Thanks for your assistance,

Nigel B
20 May 2023 at 20:05 #646010
duncan webster 1
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@duncanwebster1
It wouldn't take long probing with a battery and resistor to work out which datasheet is correct.
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