2 layers57.4 × 171.2 mm
2 layers127 × 91.5 mm
Accumulator Board
formulaslug/fs-3-schematics5Electrical Design Repository for fs-3 schematics and PCBs
- Size
- 127 × 91.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 110
- Nets
- 112
- Pads
- 439
- Tracks, vias
- 1,181, 188
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Sep 2024
- Updated
- 16 Oct 2025
Overview
Accumulator Board is an open-source printed circuit board by formulaslug, from the formulaslug/fs-3-schematics repository on GitHub. It is a 2-layer board of 127 × 91.5 mm with 110 parts on 112 nets, routed with 1,181 tracks and 188 vias.
It is built around the ISO1050DUB, DS18B20U and LTC6820HMS, with the MCP6004-E/P, HEF4093BT and L7805CV among its other parts. Its parts include 39 resistors, 17 capacitors, 13 ICs, 11 connectors and 6 diodes.
Main components
12
ISO1050DUB
SOP-8-2.54mm-55℃~+105℃ 1 1Mbps 2500 3V~5.5V 4.75V~5.25V 50kV/us Bus fault detection and protection、Fail-safe SOP-8-2.54mm Isolated CAN Transceivers ROHSTexas InstrumentsIsolated CAN Transceivers
DS18B20U
MSOP-8-55℃~+125℃ 12bit 2.5V~5.5V 400ms 750nA Single-bus ±0.4℃ MSOP-8 Temperature Sensors ROHSUMWTemperature Sensors
LTC6820HMS
MSOP16isoSPI Isolated Communications InterfaceAnalog DevicesUncategorised
MCP6004-E/P
PDIP-14-40℃~+125℃ 1.8V~6V 100uA 1MHz 1pA 1pA 23mA 28nV/√Hz@1kHz 2uV/℃ 4 4.5mV 600V/ms 76dB ESD protection Rail-to-Rail Input, Rail-to-Rail Output PDIP-14 Operational Amplifier ROHSMicrochip TechnologyOperational Amplifier
HEF4093BT
SO-14-40℃~+125℃ 1uA 3.4mA 3.4mA 3.5V~11V 3V~15V 4 4000B Series 60ns@15V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
L7805CV
TO-2200℃~+125℃@(Tj) 1 1.5A 2V@(1A) 35V 5V 68dB@(120Hz) 8mA Fixed Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74LS279ADR(LX)
SOP-16-40℃~+125℃ 28ns 2V~6V 4 4uA 5.2mA 5.2mA 74LS SR Latch SOP-16 Latches ROHSlingxingicLatches
SN74LVC1G17DBVR
SOT-23-5-40℃~+125℃ 1 1 1.2V、1.9V、2.3V、2.4V 1.65V~5.5V 100mV、300mV、400mV、550mV 10uA 32mA 32mA 74LVC 8.3ns@5V,50pF SOT-23-5 Logic Gates ROHSTECH PUBLICLogic Gates
STS6NF20V
SO-81 N-channel 11.5nC@16V 2.5W 20V 45mΩ@2.7V 600mV 640pF 68pF 6A SO-8 MOSFETs ROHSSTMicroelectronicsMOSFETs
DK1A1B-12V
插件-40℃~+65℃ 1 Form A + 1 Form B: 1A + 1B (SPST-NO + SPST-NC) 10ms 125V@DC、250V@AC 12V 200mW 30mΩ 720Ω 8A 8A@250VAC、8A@30VDC 8ms AgNi 插件 Power Relays ROHSPanasonicPower Relays
BSS308PE
SOT23-3-30V, -2A, P-Channel OptiMOS P3 Small-Signal-TransistorInfineon TechnologiesUncategorised
G6BK-1114P-US DC5
插件,19.9x9.8mm-25℃~+70℃ 10ms 10ms 125V@DC、380V@AC 30mΩ 5A 5A@250VAC 5V Silver Alloy (Cd-Free) 插件,19.9x9.8mm Power Relays ROHSOmronPower Relays
README
README.mdNotes
Please complete KiCad training before beginning or working on any projects in this repository.
Only edit another person's work if you have spoke about it with them first and they have given you permission. This applies to Leads and Captains as well.
Contact Cole Lewis, Nathaniel Platt, or Wesley Rodriguez Kronmiller for information/help relating to this repository.
Parts
110| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | STS6NF20V | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | CR1, CR2, CR3, CR4, CR5, CR6, Q1, Q2 |
| 7 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C4, C5, C6, C9, C12 |
| 7 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19, R22, R25, R28, R30, R31, R32 |
| 6 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R26, R29, R33, R34, R38 |
| 5 | D | Diode_SMD:D_2010_5025Metric_Pad1.52x2.65mm_HandSolder | D2, D4, D5, D6, D7 |
| 3 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP3, TP4, TP5 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13, C14 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R16 |
| 2 | 400k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6 |
| 2 | 7.15k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R27, R39 |
| 2 | DK1A1B-12V | FS_3_Global_Footprint_Library:DK1A1B | K1, K3 |
| 1 | .33uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 1 | 0.33uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 1.5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 1.6k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R37 |
| 1 | 100nf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 10M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C24 |
| 1 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 120k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 15pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 18k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R36 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23 |
| 1 | 2.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 200 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 1 | 200k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 22k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17 |
| 1 | 3.9k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R35 |
| 1 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24 |
| 1 | 402 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 1 | 560 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21 |
| 1 | 6.8K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | AIRs Power | Connector_Molex:Molex_Nano-Fit_105309-xx04_1x04_P2.50mm_Vertical | J7 |
| 1 | BSS308PE | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q3 |
| 1 | Current Sensor | Connector_Molex:Molex_Nano-Fit_105309-xx04_1x04_P2.50mm_Vertical | J4 |
| 1 | DS18B20U | Package_SO:MSOP-8_3x3mm_P0.65mm | U6 |
| 1 | G5PZ-1A-X DC12 | FS_3_Global_Footprint_Library:G5PZ-1A-X DC12 | K2 |
| 1 | G6BK-1114P-US | FS_3_Global_Footprint_Library:RELAY_G6BK-1114P-US_OMR | K4 |
| 1 | HEF4093B | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U7 |
| 1 | HM2113ZNL | FS_3_Global_Footprint_Library:HM2113ZNLT | L1 |
| 1 | HPZR-C50X | Diode_SMD:Nexperia_CFP3_SOD-123W | D8 |
| 1 | HVIL | Connector_Molex:Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J10 |
| 1 | IMD | Connector_Molex:Molex_Nano-Fit_105309-xx03_1x03_P2.50mm_Vertical | J1 |
| 1 | ISO1050DUB | Package_SO:SOP-8_6.62x9.15mm_P2.54mm | U1 |
| 1 | IsoSPI | Connector_Molex:Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J5 |
| 1 | IsoSPI_N | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP2 |
| 1 | IsoSPI_P | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP1 |
| 1 | L7805CV | Package_TO_SOT_THT:TO-220-3_Vertical | U9 |
| 1 | LOGO | FS_3_Global_Footprint_Library:FORMULA SLUG | G*** |
| 1 | LTC6820 | Package_SO:MSOP-16_3x4.039mm_P0.5mm | U8 |
| 1 | MC14069UBDR2G | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U16 |
| 1 | MC7809CTG | Package_TO_SOT_THT:TO-220-3_Vertical | U10 |
| 1 | MCP6004 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U5 |
| 1 | Molex Nanofit 12pin | Connector_Molex:Molex_Nano-Fit_105310-xx12_2x06_P2.50mm_Vertical | J2 |
| 1 | Molex Nanofit 16pin | Connector_Molex:Molex_Nano-Fit_105310-xx16_2x08_P2.50mm_Vertical | J11 |
| 1 | NUCLEO-L432KC | FS_3_Global_Footprint_Library:NUCLEO-L432KC | U2 |
| 1 | Precharge Resistor | Connector_Molex:Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J8 |
| 1 | SN74HCS08DR | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U11 |
| 1 | SN74LS279ADR | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | SN74LVC1G17DBVR | Package_TO_SOT_SMD:SOT-23-5 | U12 |
| 1 | Shutdown IL | Connector_Molex:Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J6 |
| 1 | TS-/TS+ | Connector_Molex:Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J9 |
| 1 | Temp Sensor | Connector_Molex:Molex_Nano-Fit_105309-xx03_1x03_P2.50mm_Vertical | J3 |
| 1 | ZXTR2005ZQ-13 | FS_3_Global_Footprint_Library:SOT-89_4P5X2P45_DIO | U15 |
The 106 most common of 110 parts.
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Questions
How big is the Accumulator Board PCB?
It measures 127 × 91.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Accumulator Board use?
110 parts, built around the ISO1050DUB, DS18B20U, LTC6820HMS and MCP6004-E/P. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Accumulator Board KiCad files?
From the formulaslug/fs-3-schematics repository on GitHub, at the commit this page was made from: the board is Accumulator_Board/Accumulator_Board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Accumulator Board design in my own project?
Its repository states no licence, so its author keeps all rights: ask formulaslug before reusing the design.