HardLabs

CN105

Qeteshpony·CN105·pcb/CN105.kicad_pcb

CN105 PCB layout, top view — open source board by Qeteshpony

About the CN105 PCB

CN105 is an open source PCB design by Qeteshpony, published on GitHub under the BSD-2-Clause license. It is a 4-layer board measuring 34 × 49 mm, with 22 components from 9 distinct parts.

By type, the board carries 10 resistors, 4 diodes, 4 capacitors, 2 transistors and 2 switches.

It belongs with the iot & wireless designs in this gallery.

From the project

Mitsubishi CN105 compatible heatpump controller for ESPHome and Home Assistant

I ordered these boards from JLCPCB (Not a sponsor) and had only the smd components on the top side assembled. You then still need an ESP32-C6-WROOM-1 module (gets soldered on the bottom) and a Gaptec LME78_03-1.0 DC/DC Regulator. Also some header pins and a cable with a JST PAP-V-S PA 2.0 5 pin connector which goes into the CN105 port on the heatpumps main board.

CN105, from the project README
From the project README

CN105 bill of materials (BOM)

22 components, 9 distinct parts.

QtyPartRefs
2
2N7002
Q1, Q2
1
RESET
SW1
1
BOOT
SW2
4
KT-0603R
D1, D2, D3, D4
1
10u
C1
1
22u
C2
2
100n
C3, C4
4
680R
R1, R2, R3, R4
6
10k
R5, R6, R7, R8, R9, R10

CN105 design files

The KiCad project lives in the Qeteshpony/CN105 repository on GitHub; these links point at the commit this page was built from.

CN105: common questions

How big is the CN105 PCB?

The CN105 measures 34 × 49 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the CN105?

22 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the CN105 design files?

From the Qeteshpony/CN105 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CN105 design in my own project?

Yes, under the terms of its BSD-2-Clause license, which Qeteshpony chose for the repository.

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