HomeBus Breakout Board
About the HomeBus Breakout Board
HomeBus Breakout Board is an open source PCB design by gregdavill, published on GitHub. It is a 2-layer board measuring 30 × 30 mm, with 45 components from 26 distinct parts.
Other key parts include the CA-IS3720, 74LVC2G14DW-7 and MAX22088. By type, the board carries 18 resistors, 11 capacitors, 9 diodes, 4 ICs and 3 connectors.
It belongs with the iot & wireless and dev boards & breakouts designs in this gallery.
From the project
ESP32-C3 hardware to connect to a Daikin ducted A/C system. enabling WiFi control in Home Assistant.
Wireless A/C Controller, an ESP32-C3 based hardware module to connect to a Daikin ducted A/C system and enable WiFi control in Home Assistant.
The PCB repo contains a few different designs: - saphire-captain : Initial ESP32 + XL1192 board. Power extraction from the bus and transmission didn't work well. - hb-bob-r0.1 : Breakout board designed for the MAX22088 homebus transceiver. This board enabled rx/tx and power from the P1P2 bus. - esp-daikin-r1.0 : Basic ESP32-C3 board with DCDC, dosigned to attach directly to the hb-bob board.
Main components on the HomeBus Breakout Board
HomeBus Breakout Board bill of materials (BOM)
45 components, 26 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | CA-IS3720 | SOIC-8_3.9x4.9mm_P1.27mm | U1, U2 |
| 1 | 74LVC2G14DW-7 | SOT-363_SC-70-6 | U3 |
| 1 | MAX22088 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U4 |
| 1 | PH_01X05 PH_01x05 | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | PinHeader 1x02 | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | C8387 Terminal Block 2P | PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_Horizontal | J3 |
| 2 | C165980 GREEN | LED_0402_1005Metric | D1, D5 |
| 1 | C165980 ORANGE | LED_0402_1005Metric | D2 |
| 1 | C165980 RED | LED_0402_1005Metric | D3 |
| 2 | BAT54S | SOT-23 | D4, D9 |
| 1 | 24V | D_SOD-123F | D6 |
| 2 | 5.6V | D_SOD-923 | D7, D8 |
| 5 | 0.1UF 0.1uF | C_0402_1005Metric | C1, C2, C3, C5, C8 |
| 1 | 220UF 220uF | CP_Elec_6.3x7.7 | C4 |
| 3 | 10UF 10uF | C_0402_1005Metric | C6, C10, C11 |
| 2 | 1UF 1uF | C_0402_1005Metric | C7, C9 |
| 8 | 20K | R_0402_1005Metric | R1, R2, R5, R6, R10, R12, R17, R18 |
| 1 | 62K 62k | R_0402_1005Metric | R3 |
| 1 | C60485 0R | R_0402_1005Metric | R4 |
| 1 | 180K 180k | R_0402_1005Metric | R7 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 27K | R_0402_1005Metric | R8 |
| 1 | 4.3K | R_0402_1005Metric | R9 |
| 1 | 82R | R_0402_1005Metric | R11 |
| 1 | 1K | R_0402_1005Metric | R13 |
| 1 | C131397 1R | R_0805_2012Metric | R14 |
| 2 | 4.7R | R_0603_1608Metric | R15, R16 |
HomeBus Breakout Board design files
The KiCad project lives in the gregdavill/daikin-esp repository on GitHub; these links point at the commit this page was built from.
HomeBus Breakout Board: common questions
How big is the HomeBus Breakout Board?
The HomeBus Breakout Board measures 30 × 30 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the HomeBus Breakout Board?
45 components, from 26 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 HomeBus Breakout Board design files?
From the gregdavill/daikin-esp 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 HomeBus Breakout Board design in my own project?
The repository has no license, so all rights stay with gregdavill. Use it as a reference, and ask the author before reusing the design.
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