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I needed something that would act as a detector on a double slip, which is a comparatively short length of track and ended up looking at light dependent resistors (LDRs), also known as photoresistors, or photocell resistors.
The ESP32 LDR tutorial referenced in the video esp32io.com/tu...
The LDR class and sample sketch used in the video github.com/Vin...
I've created a repo for all of my current live node sketches across the Arduinos, ESP32s and Galileos. All of them are written in the Arduino IDE.
github.com/Vin...
The LDRs I bought (no affiliate links) www.ebay.co.uk...
#modelrailways #modeltrains