I need to design a big 4 channel 7segment for my project, I used to design one by myself in past, but it wasn't very pleasing to work, in fact, it was painful to work with.
In that design, I putted 7 lines of parallel LEDs on a piece of wood which holes for LED pins were cut out with a laser cut machine and then I used thin wires to connect the LEDs in the back of the board. the problem was that the multiplexing those 4 channels needed 12 pins of my Arduino, and I had lots of issues for driving the LED using transistors.
This time I want to make a PCB for that, and I'm my ideal design is to use a TM1637 IC to drive the segments because of the 2 pin connection.
I downloaded the IC datasheet and here's the electric characteristics:
Now I have a problem to find what I want from this datasheet, I need to know the maximum current each segment can draw from the IC, but I don't know which one of the given current limits is that.
Also, I want to know is there another way to do or another IC to use instead of the TM1637?
Datasheet_TM1637.pdf (688 KB)