Uploaded August 2020 | Updated September 2026, 5 hours ago

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A Nextion touchscreen display and Arduino Uno together monitor the temperature of a 750W AC servo motor and control a cooling fan. IR based non-contact and contact temperature sensors are compared. I2C interfacing across voltage regions considered. Introduction to Nextion programming. The AC servo drives the spindle on a DIY CNC mill where the servo may operate for hours.

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github.com/kentavv/fan-controller
https://www.notion.so/Fan-controller-4b97f6f1ad9a44319c0e35e589f2d0a7

Bill of materials (Amazon Affiliate links):
Arduino Uno R3, DIP version: amzn.to/2Ekh8hU
Arduino Uno R3, SMD version: amzn.to/3jF4XfJ
Arduino Uno R3 Bare Shield: amzn.to/3hA0Lfq
Straight Headers: amzn.to/2ZXLKOt
Murata DC-DC Converter OKI-78SR-12/1.0-W36H-C digikey.com/product-detail/en/murata-power-solutions-inc/OKI-78SR-12-1-0-W36H-C/811-3294-ND/6817699
Nextion Enhanced NX4832K035: amzn.to/2BzLn3o
Nextion GPIO Breakout: amzn.to/300HcXz
DS18B20-based Contact Temperature Sensor: amzn.to/32WuU4u
OTI-301-based Non-contact Temperature Sensor: amzn.to/32WzyzE
MLX90614ESF-based Non-contact Temperature Sensor: amzn.to/2CQswS5
Noctua NF-F12 industrialPPC-24V-3000 Q100 IP67 PWM: amzn.to/3g4mzQ6

Table of contents:
0:00 Introduction
0:25 Monitoring and cooling AC servo motor
1:22 Overview
2:18 Teardown
4:14 Sensor defects and Arduino overheating
5:48 IR non-contact vs contact sensor response
7:14 I2C level shifting: 3.3V, 5V
12:50 Nextion programming
20:12 Closing

#KvvCreates, #Nextion, #Arduino