Group 02 · ECE, MIT-ADT University · AIoT Challenge 2026

Underground Cable Fault Detector

A live digital twin of the Arduino Uno system. Close a fault switch on any phase line and watch the relays scan, the Uno measure A0, the IoT dashboard update and the AI layer react.

Scanning R line
Try a scenario

Cable bay

3 phase lines · 4 × 100 Ω sections · 2 km each
Fault switch closed (short to ground) Insulation leak (ageing) Fault current while the relay is on
2 km4 km6 km8 km

Arduino Uno controller

Pins 8 · 9 · 10 → ULN2003 → relays
R:NF Y:4KM B:NF IoT:ON
R · D8
Y · D9
B · D10
BZD13
Line on test
R
A0 (0–1023)
1023
A0 voltage
5.00 V

Voltage divider: V(A0) = 5 V × Rcable / (1 kΩ + Rcable). No fault reads 5 V; a nearer fault reads lower.

IoT dashboard

0 V5 V 5.00 V
Last reading
Red line · healthy
Data arrives through the Uno's USB cable and the laptop bridge.

AI layer

Fault classifier + early warning

Ageing is sped up: 1 second here stands for about 1 day of insulation wear. The fixed thresholds only react once the cable is fully shorted; the AI watches the slow voltage drift before that.

Alerts

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