For my outdoor pixels, I’m currently using ESPixelStick_v3. The hardware is outstanding, supporting anything from 5V-12V input, including reverse-polarity and ESD protection, and supporting DMX output. Oh, and it has an SD card reader too. Not the least expensive controller, but I love the feature set (Well done, Shelby!).
I’m ready to go a step further. The ESPixelStick comes by default with ESP8266, and I want to use 100MB ethernet to avoid the problems that wireless adds, while retaining the fool-proof nature and other features I’ve come to love.
But, more than just a wishlist, I think I found a pin configuration that would allow use of a d1 Mini32. I’ve even mocked up some portions of the schematic on EasyEDA.
Priorities / Features (click to expand)
- (Pri 0) ESD protection on all connectors (e.g., pixel data lines)
- (Pri 0) VIN → VDD has mini/micro ATC fuse holder (e.g., LittleFuse 01530008Z)
- (Pri 0) VIN / VDD supports 5V-24V input
- (Pri 0) VDD is reverse-polarity-protected (e.g., DMP3056L-7)
- (Pri 0) VDD to +5V is regulated (e.g., TPS54202DDCR)
- (Pri 0) Basic SD card support
- (Pri 0) 1x pixel output
- (Pri 0) Built-in level-shifter for any pixel output
- (Pri 0) board printing indicates max amperage for VIN → VDD
- (Pri 1) Board traces support 7.5A from VIN → VDD
- (Pri 2) JTAG pins (IO12-IO15) exposed and usable for debugging
- (Pri 2) Built-in level-shifter has DMX output option (e.g., TI UA9638CDR)
- (Pri 3) additional pixel outputs supported
- (Pri 3) relay control pin & supporting electronics
- (Pri 3) re-use of debug pins for expansion port (e.g., LCD output)
- (Pri 3) Board traces support 10A from VIN → VDD
Note: JTAG header need not be the nice 10-pin header … it can just be a 1x6 header (4 pins, GND, 3V3).
I think I’ve come close to finding a pin assignment that works, and supports everything above (except for a relay control) with 2x pixel output lines. See linked schematic.
I’ve never designed anything even close to this complex. The Ethernet controller portion of the schematic is based on the WT32-ETH01, and likely should be scrapped for a better existing design … but it is useful to track which pins are needed from the ESP32. I also don’t know how to ensure the board would be able to handle 5A (never mind the 7.5A or 10A I’d prefer) for VIN–>VDD.
Anyone else interested in getting something like this made? I’d definitely need help.