# BMS cGnM ## 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.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/products_inactive_data/AZ432.pdf - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: AZ432ANTR-E1 **Pins:** - P1 - P2 - P3 ### D2 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj50a.md) - Manufacturer Name: Littelfuse Inc. - Datasheet URL: https://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf - Part Type: Diode - Manufacturer Part Number: SMBJ5.0A **Pins:** - A - K ### EXTTEMP1 — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### F1 — [Fuse_1812_4532Metric](https://www.flux.ai/adrian95/fuse18124532metric.md) - Voltage: 8V - Current: 1.5A - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Shenzhen-Jinkaisheng-Elec-JK-nSMD150SF_C369553.pdf - Manufacturer Part Number: JK-nSMD150SF - Manufacturer Name: Shenzhen Jinkaisheng Elec **Pins:** - P1 - P2 ### H1 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill.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.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.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.md) - Part Type: Connector - Manufacturer Part Number: Nextron(Nextronics Engineering) - Manufacturer Name: Z-100063200100100 - 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] ### POWER — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn.md) - Manufacturer Name: JST Sales America Inc. - 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) **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Part Type: Transistor - 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.md) - Manufacturer Part Number: RE-H022TD-1190(LF)(SN) - Part Type: Connector - 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 - Manufacturer Name: JST Sales America **Pins:** - P1 [pin 1] - P2 [pin 2] ### RX — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn.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.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ATTINY841-SSU](https://www.flux.ai/adrian95/attiny841-ssu.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ATTINY841-SSU - Manufacturer Name: Microchip - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8495-8-bit-AVR-Microcontrollers-ATtiny441-ATtiny841_Datasheet-Summary.pdf - Part Type: Microcontroller **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.md) - Manufacturer Part Number: EL3H7(B)(TA)-G - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Name: Everlight Electronics Co Ltd - 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.md) - Frequency: 8MHz - Manufacturer Part Number: CSTNE8M00G55A000R0 - Manufacturer Name: Murata Electronics - Part Type: Oscillator - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008251032_Murata-Electronics-CSTNE8M00G55A000R0_C341523.pdf **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-cgnm](https://www.flux.ai/dark6614/bms-cgnm).* --- *Generated from [https://www.flux.ai/dark6614/bms-cgnm](https://www.flux.ai/dark6614/bms-cgnm)*