# BMS ## 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:** ihscielle - **Created:** 7/18/2024 - **Last Updated:** 7/18/2024 - **Visibility:** Public ## Key Components ### D1 — [AZ432ANTR-E1](https://www.flux.ai/adrian95/az432antr-e1~0ck.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/products_inactive_data/AZ432.pdf - Manufacturer Part Number: AZ432ANTR-E1 - Manufacturer Name: Diodes Incorporated **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] ### D2 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj50a~a9w.md) - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/SMBJ.pdf - Manufacturer Name: Bourns Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - 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) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Part Type: Connector - 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 - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Shenzhen-Jinkaisheng-Elec-JK-nSMD150SF_C369553.pdf - Current: 1.5A - Manufacturer Name: Shenzhen Jinkaisheng Elec - Voltage: 8V **Pins:** - P1 [pin 1] - P2 [pin 2] ### 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 [pin 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 [pin 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) - Manufacturer Part Number: Nextron(Nextronics Engineering) - Manufacturer Name: Z-100063200100100 - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/2202082130_Nextron-Nextronics-Engineering-Z-100063200100100_C190817.pdf - License: https://creativecommons.org/licenses/by/4.0/ **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) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Yongyu-Photoelectric-SZYY0805R_C434431.pdf - Part Type: LED - Manufacturer Part Number: SZYY0805R - 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 - Part Type: LED - Manufacturer Part Number: SZYY0805B - Manufacturer Name: Yongyu Photoelectric **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 - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Part Type: Transistor - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Name: Alpha & Omega Semiconductor Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AO3400A **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 Part Number: RE-H022TD-1190(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151527_JST-Sales-America-RE-H022TD-1190-LF-SN_C160332.pdf **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) - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America Inc. **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 Name: JST Sales America Inc. - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ATTINY841-SSU](https://www.flux.ai/adrian95/attiny841-ssu~xgr.md) - Part Type: Microcontroller - Manufacturer Name: Microchip - Manufacturer Part Number: ATTINY841-SSU - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8495-8-bit-AVR-Microcontrollers-ATtiny441-ATtiny841_Datasheet-Summary.pdf - License: https://creativecommons.org/licenses/by/4.0/ **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) - Manufacturer Name: Everlight Electronics Co Ltd - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: EL3H7(B)(TA)-G - Part Type: Transistor - Datasheet URL: https://everlightamericas.com/index.php?controller=attachment&id_attachment=2584 **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) - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008251032_Murata-Electronics-CSTNE8M00G55A000R0_C341523.pdf - Manufacturer Name: Murata Electronics - Manufacturer Part Number: CSTNE8M00G55A000R0 - Frequency: 8MHz - Part Type: Oscillator **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ihscielle/bms~dx](https://www.flux.ai/ihscielle/bms~dx).* --- *Generated from [https://www.flux.ai/ihscielle/bms~dx](https://www.flux.ai/ihscielle/bms~dx)*