Update README.md

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@ -113,7 +113,7 @@ HUB75_I2S_CFG mxconfig(
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
```
Various people have created PCBs for which one can simply connect an ESP32 to the PCB, and then the PCB to the HUB75 connector, such as:
Various people have created PCBs for which one can simply connect an ESP32 to a PCB, and then the PCB to the HUB75 connector, such as:
* Brian Lough's [ESP32 I2S Matrix Shield](http://blough.ie/i2smat/); or
* Charles Hallard's [WeMos Matrix Shield](https://github.com/hallard/WeMos-Matrix-Shield-DMA}