MBus USB 12
About the MBus USB 12 PCB
MBus USB 12 is an open source PCB design by greenMikeEU, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 74 × 41 mm, with 23 components from 18 distinct parts.
Other key parts include the LTV-817, MAX232, NMA0515DC and NMA0512SC. By type, the board carries 7 resistors, 5 ICs, 4 connectors, 4 capacitors, 2 transistors and 1 diode.
It belongs with the sensors designs in this gallery.
From the project
SHRDZM (just a name, not an acronym) is an ESP8285/ESP8266 based sensor and actor integration platform.
To build cheap integrations of many kind of sensors and/or actors into your own automation solution with the focus on energy efficiancy (battery operated devices) and simpleness.
Main components on the MBus USB 12
MBus USB 12 bill of materials (BOM)
23 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | LTV-817 | DIP-4_W7.62mm_LongPads | U1, U2 |
| 1 | MAX232 | DIP-16_W7.62mm_LongPads | U3 |
| 1 | NMA0515DC | DCDC-Conv_muRata_NMAxxxxDC | U4 |
| 1 | NMA0512SC | DCDC-Conv_muRata_NMAxxxxSC | U5 |
| 1 | BC337 | TO-92_Molded_Wide_Oval | Q1 |
| 1 | BD136 | TO-126_Vertical | Q2 |
| 2 | — | TerminalBlock_bornier-2_P5.08mm | J1, J2 |
| 1 | Conn_01x04_Female | TerminalBlock_bornier-4_P5.08mm | J3 |
| 1 | Conn_01x03_Female | TerminalBlock_bornier-3_P5.08mm | J4 |
| 1 | LED | LED_D3.0mm | D1 |
| 4 | CP | CP_Radial_D5.0mm_P2.50mm | C1, C2, C3, C4 |
| 1 | 270 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 33k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 18k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 2k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 220k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 39 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
MBus USB 12 design files
The KiCad project lives in the greenMikeEU/shrdzm repository on GitHub; these links point at the commit this page was built from.
MBus USB 12: common questions
How big is the MBus USB 12 PCB?
The MBus USB 12 measures 74 × 41 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MBus USB 12?
23 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the MBus USB 12 design files?
From the greenMikeEU/shrdzm repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MBus USB 12 design in my own project?
Yes, under the terms of its GPL-3.0 license, which greenMikeEU chose for the repository.
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