ESP8266 3D Printer Hotend Controller

MOSFETs

NDT3055L N-Channel Logic Level Enhancement Mode Field Effect Transistor	PMV16XN 20 V, N-channel Trench MOSFET

Schematic

Hotend Schematic based on circuits from RepRap

Connections

	ESP8266	D1 mini		D1 mini	ESP8266
	RST	RST		TX	TXD
Thermistor	A0	A0 (Max 3v3)		RX	RXD
	GPIO16	D0		D1 (SCL)	GPIO5	Fan PWM
	GPIO14	D5 (SCK)		D2 (SDA)	GPIO4	Heater PWM
OLED SCL	GPIO12	D6 (MISO)		D3 (10K PU)	GPIO0
OLED SDA	GPIO13	D7 (MOSI)		D4 (10K PU LED)	GPIO2
	GPIO15	D8 (10K PD SS)		GND	GND	Pin 4
	3v3	3v3		5v	5v	Power IR Led

Links

These links are because I intend to use fuzzy logic, as opposed to PID, to control the hot-end temperature.

• Fuzzy Control Systems: The Tipping Problem
• Temperature Control using Fuzzy Logic
• Fuzzy Logic in C
• Artificial Intelligence - Fuzzy Logic Systems
• Temperature Control System Using Fuzzy Logic Technique
• Fundamentals of Fuzzy Logic Control – Fuzzy Sets, Fuzzy Rules and Defuzzifications
• Intro to Fuzzy Logic with C++ Fuzzy Set Calculator Example Program
• Fuzzy Logic - Python Example
• Fuzzy Logic in C
• Low-Cost Fuzzy Logic Control for Greenhouse Environments with Web Monitoring
• Fuzzy Urn
• Calculating Centroids of Non-Intersecting Polygons - including Python example
• Find the centroid of a polygon in C#

These links are to help me measure the hot-end temperature

• Selecting the Thermistor Voltage Divider
• Temperature Sensor V2.0
• Measuring temperature the easy way
• Automatic Control of Fan Speed using Fuzzy Logic
• NDT3055L N-Channel Logic Level Enhancement Mode Field Effect Transistor
• PMV16XN 20 V, N-channel Trench MOSFET
• ESP8266 with Multiple Analog Sensors
• NTC Thermistor Beta Calculator
• NTC Thermistors Steinhart and Hart Equation