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LED_matrix_mosfet_driver_10x10

user_476

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idea for a mosfet driver to control a powerful 10 x 10 LED matrix or led strips, implemented with IRLML6344 and IRLML6402 transistors
LED_matrix_mosfet_driver_10x10

The project is basic, for development who wants to develop it.The idea was dictated by the fact that there is a missing of such drivers on the market
Here is a version with added resistors

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LED_matrix_mosfet_driver_10x10._with_resistors

  • The reason you probably can't find many 10x10 off the shelf drivers like this, is because at this LED count, you usually want a bunch more convenience features, like a framebuffer, and handling multiplexing for you internally, so your MCU just has to update the FB.

    As an example, look at TI's LP5890 for what I mean.

  • Nice. I love transistor-based project, so I like your approach.

    Having said that, and echoing what @vmate already said; for this amount of LEDs it's normally desirable to have a higher level control interface with more features.
    There's one controller I like a lot; the MAX7219  8x8 driver. It has a serial interface, so you don't need to worry about multiplexing or toggling LEDs individually, just feed the pixel data to the IC and will do the multiplexing for you. It also handles the LED current, which you can set externally, and it can also do BCD decoding if you use it to drive 7-segment displays instead of LEDs... And all of that with just 3 wires.  Now, it's only 8x8, but it can be daisy chained to extend the display resolution without increasing the pin count.


    There are advantages to directly addressable LED matrices like yours though, like the immediate response time of each LED, the fact that you can refresh the LEDs non-sequentially, and the ability to control them with analog or mixed logic, but I think those are slightly more niche applications so I expect that most people would probably be looking for something that frees the microcontroller from toggling the LEDs one by one.