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πŸ”’ knacro 8 digital display module: max7219 control, cascading & serial io port support logo

πŸ”’ KNACRO 8 Digital Display Module: MAX7219 Control, Cascading & Serial IO Port Support Review

3

Β·

Very good

Revainrating 4.5 out of 5Β Β 
RatingΒ 
4.5
πŸšͺ Garage & Shop, πŸ”§ Automotive Tools & Equipment

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Description of πŸ”’ KNACRO 8 Digital Display Module: MAX7219 Control, Cascading & Serial IO Port Support

MAX7219 is an integrated serial input / output common-cathode display driver, it connects the microprocessor 7-segment digital LED display with 8 digits, you can also connect a bar graph display or 64 independent LED. Including a B-type BCD encoder chip, multi-channel scanning loop segment word driver, but also a static RAM 8 * 8 for storing each data. Only one external register is used to set the segment current of each LED. Convenient four-wire serial interface can be connected to all general-purpose microprocessor. Each data can be addressed in the update do not need to rewrite all of the display. MAX7219 also allows each user to select a data coding or non-coding.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    1
  • 2
    0
  • 1
    0

Type of review

Revainrating 5 out of 5

Awesome addition to my garage!

This digital display has been a game changer for my automotive work. The easy-to-read numbers and cascading feature make it incredibly convenient to use.

Pros
  • Clear display, cascading feature
Cons
  • None so far.

Revainrating 5 out of 5

Good display, reasonable price

If you can program the 74HC595 and are familiar with the 7 segment display then programming this unit should not be a problem. If not, Google is your friend; There are many code examples.

Pros
  • Performance accessories
Cons
  • Expensive

Revainrating 3 out of 5

May need to be touched up when you get it

The lack of documentation on this made me scratch my head but I was able to find detailed information on it scattered around the web. Since there is no documentation, you are on your own. So if you don't yet know which components are installed or don't use it as a spare part, you can look for something else that is better documented. The key is in the 74HC595D, of which there are two on the board. These are standard 8-bit serial shift registers. So if you can work with it, you can work with it.

Pros
  • Power Converter
Cons
  • Other