EPS
About the EPS PCB
EPS is an open source STM32 PCB design by MatthiasGeorgImhof, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 80 × 80 mm, with 238 components from 74 distinct parts.
Its main chip is the STM32L496VGT6, from the STM32 family. Other key parts include the TPS22968QDMGRQ1, TPL5010DDCR, MR25H10CDFR, TPS631000DRLR and TCAN3414DRBR. By type, the board carries 111 capacitors, 56 resistors, 33 ICs, 12 connectors, 9 diodes and 5 inductors.
It belongs with the power & battery and science & space designs in this gallery.
From the project
Hardware design files for Cubesat PCBs
- STM32L496VGTx controller - 2x CAN buses - 2x 18650 LiPo batteries for operation and 1x CR2450 cell for RTC
Main components on the EPS
EPS bill of materials (BOM)
238 components, 74 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | TPS22968QDMGRQ1 TI | WSON-10-1EP_2x3mm_P0.5mm_EP0.84x2.4mm | U1, U2, U18, U19, U20, U21, U23, U24 |
| 1 | TPL5010DDCR TPL5010 TI | SOT-23-6 | U3 |
| 1 | STM32L496VGT6 STM32L496VGTx STM | LQFP-100_14x14mm_P0.5mm | U4 |
| 1 | MR25H10CDFR MR25H10 Everspin | DFN-8-1EP_6x5mm_P1.27mm_EP2x2mm | U5 |
| 4 | TPS631000DRLR TI | TPS631000DRLR_TEX | U6, U9, U10, U33 |
| 2 | TCAN3414DRBR TCAN3414 TI | VSON-8-1EP_3x3mm_P0.65mm_EP1.65x2.4mm | U7, U8 |
| 2 | LTC4066EUF-1#PBF LTC4066 Analogue Devices | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U11, U12 |
| 2 | TPS22995RZGR TPS22995 TI | WQFN-HR6_RZG_TEX | U13, U15 |
| 2 | MCP65R46T-1202E/CHY MCP65R46 Mictochip | SOT-23-6_Handsoldering | U14, U16 |
| 1 | TPS2115ADRBR TI | SON65P300X300X100-9N | U17 |
| 1 | MT29F4G01ABAFDWB-IT:F TR Micron | SON127P800X600X65-8N | U22 |
| 2 | MCP23008T-E/SS Microchip | SSOP-20_5.3x7.2mm_P0.65mm | U25, U28 |
| 2 | INA226AIDGSR TI | VSSOP-10_3x3mm_P0.5mm | U26, U27 |
| 1 | INA226AIDGSR INA226 TI | VSSOP-10_3x3mm_P0.5mm | U29 |
| 2 | LM66200DRLR TI | SOT-5X3_DRL_TEX | U30, U31 |
| 1 | SN74LVC2G07DCKR 74LVC2G07 TI | SOT-363_SC-70-6 | U32 |
| 1 | ECS-327MVATX-2-CN-TR3 32.768KHZ ECS | Oscillator_SMD_ECS_2520MV-xxx-xx-4Pin_2.5x2.0mm | X1 |
| 1 | ECS-2520MVLC-100-CN-TR 10MHz ECS | Oscillator_SMD_ECS_2520MV-xxx-xx-4Pin_2.5x2.0mm | X2 |
| 2 | W2A25C104K4T2A 100nF Kypdera | W2A2-X | CN1, CN2 |
| 4 | M50-3200345 Conn_02x03_Odd_Even Harwin | HARWIN_M50-3200345 | J1, J2, J3, J4 |
Show 54 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | vertical Conn_01x05_Pin Vertical generic | PinHeader_1x05_P2.54mm_Vertical | J5 |
| 1 | vertical Conn_01x04_Pin Vertical generic | PinHeader_1x04_P2.54mm_Vertical | J6 |
| 2 | vertical Conn_01x02 generic | PinHeader_1x02_P1.27mm_Vertical | J7, J8 |
| 1 | 10153301-20111LF PC104 Conn_02x20_Odd_Even Amphenol | PinSocket_2x20_P2.54mm_Vertical | J9 |
| 1 | 10155435-00011LF Amphenol | AMPHENOL_10155435-00011LF | J10 |
| 1 | CR2450 | Battery_Panasonic_CR2450-VAN_Vertical_CircularHoles | BT1 |
| 2 | 54 Battery_Cell Keystone | BatteryHolder_Keystone_54_v2_1x18650 | BT2, BT3 |
| 2 | 1206L380SLTHYR Polyfuse Littlefuse | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1, F2 |
| 2 | EVP-AA602W Panasonic | EVP602AA | SW1, SW2 |
| 1 | vertical Conn_01x02_Pin Vertical generic | PinHeader_1x02_P2.54mm_Vertical | SW3 |
| 2 | vertical Thermistor_NTC generic | PinHeader_1x02_P1.27mm_Vertical | TH1, TH2 |
| 1 | LTST-C191KRKT RED Lite-On | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | LTST-C191KGKT GREEN Lite-On | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 3 | LTST-C191KSKT YELLOW Lite-On | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3, D4, D5 |
| 2 | NUP2105LT1G onsemi | SOT-23 | D6, D7 |
| 2 | NRVBA210LNT3G onsemi | D_SMA | D8, D9 |
| 1 | BLM18PG121SN1D 120R Murata | L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | FB1 |
| 4 | DFE252012P-1R0M=P2 1uH Murata | L_1008_2520Metric_Pad1.43x2.20mm_HandSolder | L1, L2, L3, L4 |
| 16 | GRM1555C1H221JA01J 220pF Murata | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C5, C7, C11, C60, C64, C66, C70 +8 |
| 16 | GRM188R61E106KA73D 10u Murata | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C6, C8, C12, C61, C65, C67, C71 +8 |
| 8 | GRM188R61A226ME15D 22u Murata | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C9, C62, C68, C74, C80, C87, C93 |
| 15 | GRM155R61E104KA87D 100n Murata | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4, C10, C27, C28, C35, C39, C63, C69 +7 |
| 13 | GRM188R61E106KA73D 10uF Murata | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C13, C14, C15, C16, C20, C22, C23, C26 +5 |
| 17 | GRM155R61E104KA87D 100nF Murata | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C17, C18, C19, C21, C24, C25, C54, C55 +9 |
| 8 | GRM21BR61A476ME15K 47uF Murata | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C29, C30, C40, C41, C43, C44, C109, C110 |
| 4 | GRM188R61A226ME15D 22uF Murata | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C31, C42, C45, C111 |
| 4 | GRM1555C1H101JA01D 100p Murata | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C32, C34, C36, C38 |
| 2 | GRM155R61H472KA01D 4n7 Murata | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C33, C37 |
| 8 | GRT188R61E475KE13D 4.7uF Murata | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C46, C47, C48, C49, C50, C51, C52, C53 |
| 1 | RT0402BRD07806KL 806K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1 |
| 1 | RC0402FR-07330KL 330K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 1 | RC0402FR-0722KL 22K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3 |
| 1 | RC0402FR-0722RL 22R YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 4 | RC0402FR-0791KL 91K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5, R10, R11, R39 |
| 4 | RC0805FR-0760R4L 60R4 YAGEO | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R7, R8, R9 |
| 2 | RC0402FR-0726K7L 26.7K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R12, R15 |
| 4 | RC0402FR-0710KL 10K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R13, R16, R21, R25 |
| 2 | RC0402FR-071ML 1M YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14, R17 |
| 1 | RC0805FR-0760R4L DNP YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R18 |
| 4 | RC0402FR-07100KL 100K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R19, R23, R31, R34 |
| 2 | RC0402FR-07280KL 280K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R20, R24 |
| 1 | 49.9 DNP YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R22 |
| 1 | RC0402FR-07330RL 330R YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R26 |
| 2 | RC0402FR-0791KL 100K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R27, R28 |
| 2 | RC0402FR-075K1L 5K1 YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R29, R30 |
| 3 | PE0805FRE470R01Z 10m YAGEO | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R32, R33, R35 |
| 2 | RC0402FR-07511KL 511K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R36, R38 |
| 1 | RC0402FR-07490KL 490K YAGEO | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R37 |
| 7 | EXB-24V104JX 100K Panasonic | R_Array_Convex_2x0402_widepads | RN1, RN2, RN3, RN4, RN6, RN7, RN13 |
| 3 | EXB-28V104JX 100K Panasonic | R_Array_Convex_4x0402_widepads | RN5, RN8, RN16 |
| 2 | EXB-24V562JX 5K6 Panasonic | R_Array_Convex_2x0402_widepads | RN9, RN10 |
| 1 | EXB-2HV102JV 1K Panasonic | R_Array_Convex_8x0602_widepads | RN11 |
| 1 | EXB-24V562JX 22R Panasonic | R_Array_Convex_2x0402_widepads | RN12 |
| 3 | EXB-24V103JX 10K Panasonic | R_Array_Convex_2x0402_widepads | RN14, RN15, RN17 |
EPS design files
The KiCad project lives in the MatthiasGeorgImhof/Hardware_CSAT repository on GitHub; these links point at the commit this page was built from.
- Layouteps_board/EPS.kicad_pcb
- Schematiceps_board/EPS.kicad_sch
- BOMeps_board/EPS_v1_0_BOM.csv
EPS: common questions
What microcontroller does the EPS use?
The EPS is built around the STM32L496VGT6, from the STM32 family.
How big is the EPS PCB?
The EPS measures 80 × 80 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the EPS?
238 components, from 74 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 EPS design files?
From the MatthiasGeorgImhof/Hardware_CSAT repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the EPS 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 EPS without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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