Hi,
I'm trying to charlieplex my 7 segment display using Ardunio Nano. It has got 18 pins. How should i do connections?
In a charlieplex-manner... Really, without a pinout/datasheet, how are we suppose to know?
But 18 is to little for each segment to have it's anode and cathode exposed. Because that would result in (even ignoring the possible dot) 2 (digits) x 7 (segments) x 2 (pins) = 28 pins. 18 pins sounds like 2 (common anode/cathode per digit) + 2 (digits) x 8 (segments) = 18. Which you can multiplex but can not charlieplex.
I found a datasheet and that is the circuit I'm trying to make.
Can someone help?
peymil:
Can someone help?
Didn't I already do that?
peymil:
I found a datasheet
You could at least link to it instead of stupid photos of it...
peymil:
that is the circuit I'm trying to make.
I don't see any circuit... Just photo's of the display connected.
And in the last photo (of the datasheet) I can already see the display is common anode and already multiplexed. No way you can drive it anyway else including charlieplexing.
peymil:
I'm trying to charlieplex my 7 segment display
You cannot charlieplex one of those displays.
If you had between 2 and 8 x 1-digit displays, you could charlieplex them using 9 Arduino pins.
If you had between 2 and 5 x 2-digit displays, you could charlieplex them using 10 Arduino pins.
With 1 x 2-digit display, you can multiplex using 10 Arduino pins.