Arduino OpenTherm shield
About the Arduino OpenTherm shield
Arduino OpenTherm shield is an open source PCB design by michpro, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 68.6 × 53.3 mm, with 46 components from 35 distinct parts.
Other key parts include the MT3540-F23 and LTV-817S. By type, the board carries 18 resistors, 12 diodes, 6 transistors, 4 capacitors, 3 ICs and 2 connectors.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Arduino hardware shield to send and receive data from OpenTherm devices
- Arduino UNO OpenTherm Shield - Overview - Features - Schematic diagram - Module visualisation - Assembly - Production files - Testing out the hardware - Prerequisites - Instructions - Notes - Software - Reporting bugs - License - Hardware - Software - Support
This work is based on otgw.tclcode.com project.
For Arduino UNO: * JP1 jumper – leave in the Auto position (Vcc from IOREF).
Main components on the Arduino OpenTherm shield
Arduino OpenTherm shield bill of materials (BOM)
46 components, 35 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MT3540-F23 | SOT-23-5 | U1 |
| 2 | LTV-817S | SMDIP-4_W9.53mm | U2, U3 |
| 4 | MMBT2907A | SOT-23 | Q1, Q2, Q3, Q4 |
| 2 | MMBT2222A | SOT-23 | Q5, Q6 |
| 1 | BOILER | Altech_AK100_1x02_P5.00mm | J1 |
| 1 | THERM | Altech_AK100_1x02_P5.00mm | J2 |
| 1 | 1N5819W | D_SOD-123 | D1 |
| 4 | 1N4148W | D_SOD-123 | D2, D3, D4, D5 |
| 1 | 4V7 | D_SOD-123 | D6 |
| 1 | 13V | D_SOD-123 | D7 |
| 1 | 4V3 | D_SOD-123 | D8 |
| 1 | 8V2 | D_SOD-123 | D9 |
| 1 | C84256 PWR | LED_0805_2012Metric | D10 |
| 1 | C2297 RxB | LED_0805_2012Metric | D11 |
| 1 | C2296 RxT | LED_0805_2012Metric | D12 |
| 1 | 10UH 10uH | Inductor_4.2x4.4mm | L1 |
| 1 | 10U 10u | C_0603_1608Metric | C1 |
| 1 | 22P 22p | C_0603_1608Metric | C2 |
| 1 | 100N 100n | C_0603_1608Metric | C3 |
| 1 | 10U 10u | C_0805_2012Metric | C4 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 240K 240k | R_0603_1608Metric | R1 |
| 1 | 13K 13k | R_0603_1608Metric | R2 |
| 1 | 330 | R_0603_1608Metric | R3 |
| 1 | 220 | R_0603_1608Metric | R4 |
| 2 | 100 | R_0603_1608Metric | R5, R8 |
| 1 | 560 | R_0603_1608Metric | R6 |
| 2 | 10K 10k | R_0603_1608Metric | R7, R12 |
| 1 | 33K 33k | R_0603_1608Metric | R9 |
| 2 | 20 | R_0603_1608Metric | R10, R11 |
| 1 | 150K 150k | R_0603_1608Metric | R13 |
| 1 | 1k | R_0603_1608Metric | R14 |
| 1 | 4K7 4k7 | R_0603_1608Metric | R15 |
| 1 | 1K8 1k8 | R_0603_1608Metric | R16 |
| 1 | 5K1 5k1 | R_0603_1608Metric | R17 |
| 1 | 1K5 1k5 | R_0603_1608Metric | R18 |
Arduino OpenTherm shield design files
The KiCad project lives in the michpro/Arduino_OpenTherm_shield repository on GitHub; these links point at the commit this page was built from.
Arduino OpenTherm shield: common questions
How big is the Arduino OpenTherm shield?
The Arduino OpenTherm shield measures 68.6 × 53.3 mm, has 2 copper layers and is 1 mm thick.
How many components are on the Arduino OpenTherm shield?
46 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Arduino OpenTherm shield design files?
From the michpro/Arduino_OpenTherm_shield repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Arduino OpenTherm shield design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which michpro chose for the repository.
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