ModuleV450
stuartpittaway·diyBMSv4·ModuleV450/ModuleV450.kicad_pcb
About the ModuleV450 PCB
ModuleV450 is an open source AVR/Arduino PCB design by stuartpittaway, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 30 × 61.4 mm, with 39 components from 26 distinct parts.
Its main chip is the ATTINY1624-SSU, from the AVR/Arduino family. Other key parts include the EL3H7(B)(TA)-G. By type, the board carries 21 resistors, 4 diodes, 2 ICs, 2 connectors, 2 capacitors and 1 transistor.
It belongs with the power & battery designs in this gallery, and the repository also holds 2 earlier revisions of it.
From the project
Version 4 of the diyBMS
Do it yourself battery management system for Lithium ion battery packs/cells
More discussion Open Energy Monitor Forum
If you are looking for version 3 (obsolete) of this project take a look here
THIS REPOSITORY CONTAINS THE HARDWARE FOR THE SYSTEM
If you order a PCB, please use my affiliate link to help support this project JLCPCB
If you find the BMS useful, please consider buying me a beer, check out Patron for more information

Main components on the ModuleV450
ModuleV450 bill of materials (BOM)
39 components, 26 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EL3H7(B)(TA)-G | SOP-4_4.4x2.6mm_P1.27mm | U1 |
| 1 | ATTINY1624-SSU ATTINY1624-SSU-ND | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | AO3400A | SOT-23 | Q1 |
| 1 | J | PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | Comms | PhoenixContact_MC_1,5_4-G-3.81_1x04_P3.81mm_Horizontal | J2 |
| 1 | Ext Temp Sensor | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | EXTTEMP1 |
| 1 | MSMD150 mSMD150 | Fuse_1812_4532Metric | F1 |
| 1 | Battery | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | POWER1 |
| 1 | Battery | PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_Horizontal | POWER2 |
| 1 | RX Connector | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | RX1 |
| 1 | TX Connector | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | TX1 |
| 1 | UPDI | PinSocket_1x03_P2.54mm_Vertical | UPDI1 |
| 1 | AZ432ANTR-E1 | SOT-23 | D1 |
| 1 | SMBJ5.0A | D_SMB | D2 |
| 1 | Red | LED_0805_2012Metric | D3 |
| 1 | Blue | LED_0603_1608Metric | D4 |
| 1 | 100NF 100nF | C_0805_2012Metric | C1 |
| 1 | 10UF 10uF | C_0805_2012Metric | C2 |
| 1 | 100K | R_0805_2012Metric | R1 |
| 1 | 1KOHMS | R_0805_2012Metric | R2 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 180R | R_0805_2012Metric | R5 |
| 9 | 3R | R_2010_5025Metric | R6, R8, R10, R22, R24, R25, R26, R27 +1 |
| 1 | 510OHMS | R_0805_2012Metric | R14 |
| 3 | 10KOHMS | R_0805_2012Metric | R15, R20, R21 |
| 3 | 2K2 | R_0805_2012Metric | R16, R17, R18 |
| 2 | CMFB103F3950FANT | R_0805_2012Metric | R19, R23 |
ModuleV450 design files
The KiCad project lives in the stuartpittaway/diyBMSv4 repository on GitHub; these links point at the commit this page was built from.
ModuleV450: common questions
What microcontroller does the ModuleV450 use?
The ModuleV450 is built around the ATTINY1624-SSU, from the AVR/Arduino family.
How big is the ModuleV450 PCB?
The ModuleV450 measures 30 × 61.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the ModuleV450?
39 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 ModuleV450 design files?
From the stuartpittaway/diyBMSv4 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the ModuleV450 design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
Can I test firmware for the ModuleV450 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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Earlier revisions in the repo: ModuleV440, ModuleV421
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