What is it?

This is a 8 digit, 16 segment LED display with I2C connectivity

Why did you make it?

I wanted the "old" look of 16 segment display, That's when I've found the MAX6955 and decided to see how small I can squeeze this project.

What makes it special?

The PCB is only the size of the LED modules, connectivity is very simple i2c protocol with many capabilities, such as built in Blink and Intensity control and even 5 GPIOs.

Can you solder it for me?

This project is a DIY type of project, unfortunately I don't have the time to solder this kit for you.

While most of the PCB isn't very challenging to solder, the MAX6955 has a very tight pitch, which is challenging to solder.

If you're not comfortable with 0.8mm pitch soldering, DO NOT ORDER THIS KIT, every pin matters and it can get frustrating when 136 LEDs are depending on it.

How can I use it?

The source code for the demo in the video is available on a github repository and should be easily ported to any MCU that supports i2c.

The project was built using PlatformIO, which became my favorite IDE for embedded since I've first tried it.

Specs

• MAX6955 alphanumeric controller with built in ascii 127 encoder.
• 8 x 16 segement 0.8" LED displays included in the color of your choice
• Maximum Current per LED is 40ma
• RSET controls the maximum brightness
• CSET controls the rate of blinking
• Input voltage is 3.3v (can be changed up to 5.5v but CSET and RSET needs to be modified as well, see MAX6955 datasheet for details
• AD0/AD1 exposed as PCB jumpers
• OSC and BLINK pins are exposed

Package Contents

• PCB
• All Passive Components Needed
• MAX6955
• 8 * 16 Segment LED Display
• 10cm 7 Wire Flat Cable