M-NET-Thermostat
About the M-NET-Thermostat PCB
M-NET-Thermostat is an open source PCB design by gajdi88, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 55.9 × 64.8 mm, with 33 components from 18 distinct parts.
Other key parts include the LM741, 74LS04, NA555P, LM2672N-5.0 and LM2672N-3.3. By type, the board carries 10 capacitors, 10 resistors, 6 ICs, 2 connectors, 2 diodes and 2 inductors.
From the project
Smart thermostat for Mitsubishi's M-NET communication protocol
Since M-NET relies on a proprietary protocol, some custom electronics are required to be able to read and write to the bus. This is to simulate the behaviour of the comms protocol in designing the electronics.
The falstad schematic can be loaded into a free circuit simluator at https://www.falstad.com/circuit/circuitjs.html
Main components on the M-NET-Thermostat
M-NET-Thermostat bill of materials (BOM)
33 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | LM741 | DIP-8_W7.62mm | U1, U2 |
| 1 | 74LS04 | DIP-14_W7.62mm | U3 |
| 1 | NA555P | DIP-8_W7.62mm | U4 |
| 1 | LM2672N-5.0 | DIP-8_W7.62mm | U5 |
| 1 | LM2672N-3.3 | DIP-8_W7.62mm | U6 |
| 1 | 2N7002K | SOT-23 | Q1 |
| 2 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1, J2 |
| 2 | B350 | D_SMC | D1, D2 |
| 2 | INDUCTOR | L_Axial_L6.6mm_D2.7mm_P10.16mm_Horizontal_Vishay_IM-2 | L1, L2 |
| 2 | 200nF | C_0805_2012Metric | C1, C2 |
| 1 | 1uF | C_0805_2012Metric | C3 |
| 1 | 100nF | C_0805_2012Metric | C4 |
| 2 | 100uF | C_0805_2012Metric | C5, C6 |
| 2 | 10nF | C_0805_2012Metric | C7, C8 |
| 2 | 68uF | C_0805_2012Metric | C9, C10 |
| 8 | 10k | R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R9, R10 |
| 1 | 1k | R_0805_2012Metric | R7 |
| 1 | 1.8k | R_0805_2012Metric | R8 |
M-NET-Thermostat design files
The KiCad project lives in the gajdi88/M-NET-Thermostat repository on GitHub; these links point at the commit this page was built from.
M-NET-Thermostat: common questions
How big is the M-NET-Thermostat PCB?
The M-NET-Thermostat measures 55.9 × 64.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the M-NET-Thermostat?
33 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the M-NET-Thermostat design files?
From the gajdi88/M-NET-Thermostat repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the M-NET-Thermostat design in my own project?
Yes, under the terms of its GPL-3.0 license, which gajdi88 chose for the repository.