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Update README.md

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Ricardo Band 2023-03-23 00:08:41 +01:00 committed by GitHub
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@ -10,7 +10,7 @@ This is the documentation for the CCCB street sign internals. Here you can figur
[![connection diagram for the electronics](https://github.com/cccb/cccb-schild/raw/main/electronics.drawio.svg)](https://app.diagrams.net/?mode=github#Hcccb%2Fcccb-schild%2Fmain%2Felectronics.drawio.svg)
The Microcontroller used is a [Olimex ESP32-POE-EA-IND](https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware) which supports Ethernet connectivity and POE. This simplified the power management and connectivity.
The Microcontroller used is a [Olimex ESP32-POE-ISO-EA-IND](https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/open-source-hardware) which supports Ethernet connectivity and POE. This simplified the power management and connectivity.
Instead of a normal level shifter, a [Diodes 74AHCT1G126](https://www.diodes.com/assets/Datasheets/74AHCT1G126.pdf) is used.