TIL311 test program
TIL311 are single-digits LED hexadecimal displays with an internal four-bit latch and decoder along with the LED drivers. They come in 14 pins, dual-in-line-package. The characters are made of an 4 x 7 array of red LEDs.
I bought some from AliExpress. I wrote a test program using an Arduino to test them. Each 16 digits, both decimal points along with the latch and blanking functions are tested.
It is important to note the resistors ( above 220 ohms) are required for the decimal points.