TM1637 and Jumbo Display

Other Hardware Displays
1

Aaaah finally I could find a way to start a new topic.

I need to make a jumbo display of 6" size with TM1637.

Primary reason to use TM1637 is my software and hardware (used CATALEX 7 segment display module of 4 digits) has been tested with it. I am happy with the result.

To scale is up to a jumbo module, I have done the circuit as per the schematic attached.

Just to remind, Each segment has 2 rows of 10 LED's with a current limiting resistor for each row.

Although the circuit shows only one segment (A1), I have 3 segments (A2 and A3) as well.

Before I power it up, I want your opinion on the correctness.

Please suggest.

thanks,

Madhav

Display driver board for forum.pdf (50.1 KB)

2

Use a TPIC6B595 instead of that part and all the discrete parts.
Same as writing to 74HC595 shift register, only it has 150mA outputs rated to 50V.

digitalWrite (latchPin, LOW);
SPI.transfer (fontArray[yourNumber]);
digitalWrite (latchPin, HIGH);

or this if time is not a concern

digitalWrite (latchPin, LOW);
shiftOut (dataPin, clockPin, MSBFIRST, fontArray[yourNumber]);
digitalWrite (latchPin, HIGH);
3

I'm facing exactly the same problem.
Just wanted to ask if your schematic based on TM1637 works ?