Simple incubator

The goal is to create a simple controller of temperature for an incubator.

Pinout

Pin Port	Function	Incubator Functions	Description
PC6	/RESET	/RESET	- Low level Reset pin. - DTS pin for Serial communication. - SS pin for SPI communication.
PD0	0	RX	RX pin for Serial communication.
PD1	1	TX	TX pin for Serial communication.
PD5	5	OUT_FAN	Pin for fan control.
PD6	6	PID_CONTROL	Pin for PID control (need to have PWM).
PB2	10	OUT_ERROR	Pin for Error notification.
PB3	MOSI	MOSI	MOSI pin for SPI communication.
PB4	MISO	MISO	MISO pin for SPI communication.
PB5	13	SCK MONITORING_LED	- SCK pin for SPI communication. - Pin for Monitoring LED.
PC0	A0	TEMP_EXT3	Pin for One-wire external temperature sensor 3.
PC1	A1	TEMP_EXT2	Pin for One-wire external temperature sensor 2.
PC2	A2	TEMP_EXT1	Pin for One-wire external temperature sensor 1.
PC3	A3	TEMP_PCB	Pin for One-wire temperature sensor in the PCB.
PC4	SDA	SDA	SDA pin for I2C communication (Slave I2C).
PC5	SCL	SCL	SCL pin for I2C communication (Slave I2C).

Power supply

• Plug for 12/18/24 V.
• LM7805 (DDPAK/TO-263 for 5 V @ 1.5 A) µC power supply.

Schematic

• Minimal connections for ATMEGA328:

• Serial communication and programming with FTDI board:

• ISP communication for burn boatloader (and programming if you want it):

• Step-down converter to 5 V:

Inspiration for PCB

• Resistor + Capacitor: 0805

• https://github.com/Hackuarium/esp-12e/tree/master/kica

  • ICSP - TAG connect - take care of pin mapping !
  • FTDI232.

Get inspired from scale board

https://github.com/Hackuarium/beemos/tree/master/scale-i2c/eagle https://github.com/Hackuarium/esp-12e/tree/master/kicad/libs