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Fridge Controller

RICCIARDI-Adrien·Fridge_Controller·Hardware/Fridge_Controller.kicad_pcb

Fridge Controller PCB layout, top view — open source PIC board by RICCIARDI-Adrien

About the Fridge Controller PCB

Fridge Controller is an open source PIC PCB design by RICCIARDI-Adrien, published on GitHub under the MIT license. It is a 2-layer board measuring 91 × 67 mm, with 22 components from 14 distinct parts.

Its main chip is the PIC12F683-IP, from the PIC family. Other key parts include the MCP1541T-ITT. By type, the board carries 5 capacitors, 5 resistors, 3 connectors, 3 diodes, 2 ICs and 1 transistor.

It belongs with the sensors designs in this gallery.

From the project

A simple fridge/freezer controller.

A very simple controller with a light electronic BoM. It manages the fridge temperature with hardcoded thresholds and hysteresis.

The board is powered by a PIC12F683 MCU. It samples the fridge or freezer temperature through a NTC sensor. It then controls the fridge cold unit through a 230V/12A relay.

The board schematic and PCB are designed with KiCad 6.

The microcontroller firmware is compiled with the free version of Microchip XC8 compiler.

Fridge Controller, from the project README
From the project README

Main components on the Fridge Controller

PIC12F683-IPMCP1541T-ITT

Fridge Controller bill of materials (BOM)

22 components, 14 distinct parts.

QtyPartRefs
1
PIC12F683-IP
U1
1
MCP1541T-ITT
U2
1
DMG3414U
Q1
3
CTB0508/2
Camdenboss
J1, J2, J3
1
696101000002
Wurth
F1
1
RZ01-1A4-D005
K1
1
IRM-02-5
PS1
1
S1BB-13-F
D1
1
Power
D2
1
Compressor
D3
3
2.2u
C1, C2, C5
2
100n
C3, C4
3
10K
R1, R2, R5
2
270
R3, R4

Fridge Controller design files

The KiCad project lives in the RICCIARDI-Adrien/Fridge_Controller repository on GitHub; these links point at the commit this page was built from.

Fridge Controller: common questions

What microcontroller does the Fridge Controller use?

The Fridge Controller is built around the PIC12F683-IP, from the PIC family.

How big is the Fridge Controller PCB?

The Fridge Controller measures 91 × 67 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fridge Controller?

22 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fridge Controller design files?

From the RICCIARDI-Adrien/Fridge_Controller repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Fridge Controller design in my own project?

Yes, under the terms of its MIT license, which RICCIARDI-Adrien chose for the repository.

Can I test firmware for the Fridge Controller without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

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