# BMS 7GaB ## Description DIY BMS using ATTINY841-SSU this hardware has a higher balance current, fuse and TVS diode to help with voltage spikes. Most importantly, an external crystal to the micro controller (attiny841) which means the device is more reliable in low voltage situations ## Project Details - **Owner:** dark6614 - **Created:** 3/31/2024 - **Last Updated:** 3/31/2024 - **Visibility:** Public ## Key Components ### D1 — [AZ432ANTR-E1](https://www.flux.ai/adrian95/az432antr-e1~0ck.md) - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: AZ432ANTR-E1 - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/products_inactive_data/AZ432.pdf **Pins:** - P1 - P2 - P3 ### D2 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj50a~a9w.md) - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/SMBJ.pdf - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Bourns Inc. - Manufacturer Part Number: SMBJ5.0A **Pins:** - A [pin 2] - K [pin 1] ### EXTTEMP1 — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### F1 — [Fuse_1812_4532Metric](https://www.flux.ai/adrian95/fuse18124532metric~yh8.md) - Manufacturer Part Number: JK-nSMD150SF - Current: 1.5A - Manufacturer Name: Shenzhen Jinkaisheng Elec - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Shenzhen-Jinkaisheng-Elec-JK-nSMD150SF_C369553.pdf - Voltage: 8V **Pins:** - P1 - P2 ### H1 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H2 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H3 — [Mounting Hole 3.2mm DIN965 Pad](https://www.flux.ai/adrian95/mounting-hole-32mm-din965-pad~aio.md) - Part Type: Connector **Pins:** - Pin_1 [pin 1] ### J2 — [Pin Socket 02x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-02x03-254mm-vertical~gq.md) - Part Type: Connector - Manufacturer Part Number: Nextron(Nextronics Engineering) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Z-100063200100100 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2202082130_Nextron-Nextronics-Engineering-Z-100063200100100_C190817.pdf **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### LED3 — [LED 0805 (2012 Metric)](https://www.flux.ai/jharwinbarrozo/led-0805-2012-metric~ph.md) - Manufacturer Part Number: SZYY0805R - Part Type: LED - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Yongyu-Photoelectric-SZYY0805R_C434431.pdf - Manufacturer Name: Yongyu Photoelectric **Pins:** - A [pin 2] - K [pin 1] ### LED4 — [LED 0805 (2012 Metric)](https://www.flux.ai/jharwinbarrozo/led-0805-2012-metric~ph.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Yongyu-Photoelectric-SZYY0805B_C434433.pdf - Manufacturer Name: Yongyu Photoelectric - Part Type: LED - Manufacturer Part Number: SZYY0805B **Pins:** - A [pin 2] - K [pin 1] ### POWER — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Manufacturer Part Number: AO3400A - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### REMOTE — [Pin Header 01x02 2.54mm Vertical](https://www.flux.ai/jharwinbarrozo/pin-header-01x02-254mm-vertical~4uy.md) - Manufacturer Name: JST Sales America - Manufacturer Part Number: RE-H022TD-1190(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151527_JST-Sales-America-RE-H022TD-1190-LF-SN_C160332.pdf - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### RX — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### TX — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ATTINY841-SSU](https://www.flux.ai/adrian95/attiny841-ssu~xgr.md) - Manufacturer Part Number: ATTINY841-SSU - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Microchip - Part Type: Microcontroller - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8495-8-bit-AVR-Microcontrollers-ATtiny441-ATtiny841_Datasheet-Summary.pdf **Pins:** - ~RESET~/PB3 [pin 4] - AREF/PA0 [pin 13] - GND [pin 14] - PA1 [pin 12] - PA2 [pin 11] - PA3 [pin 10] - PA4 [pin 9] - PA5 [pin 8] - PA6 [pin 7] - PA7 [pin 6] - PB2 [pin 5] - VCC [pin 1] - XTAL1/PB0 [pin 2] - XTAL2/PB1 [pin 3] ### U2 — [EL3H7(B)(TA)-G](https://www.flux.ai/adrian95/el3h7bta-g~gxd.md) - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: EL3H7(B)(TA)-G - Datasheet URL: https://everlightamericas.com/index.php?controller=attachment&id_attachment=2584 - Manufacturer Name: Everlight Electronics Co Ltd **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] ### Y1 — [Crystal SMD 5032 2PIN](https://www.flux.ai/adrian95/crystal-smd-5032-2pin~v9u.md) - Manufacturer Name: Murata Electronics - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008251032_Murata-Electronics-CSTNE8M00G55A000R0_C341523.pdf - Manufacturer Part Number: CSTNE8M00G55A000R0 - Part Type: Oscillator - Frequency: 8MHz **Pins:** - P1 - P2 - P3 - P4 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dark6614/bms-7gab~ua](https://www.flux.ai/dark6614/bms-7gab~ua).* --- *Generated from [https://www.flux.ai/dark6614/bms-7gab~ua](https://www.flux.ai/dark6614/bms-7gab~ua)*