4 layers187 × 352.1 mm
2 layers100 × 79 mm
Board Capstone
COEN490-2025-CyclOps/PCB- Size
- 100 × 79 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 78
- Pads
- 269
- Tracks, vias
- 406, 63
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Nov 2025
- Updated
- 22 Feb 2026
Overview
Board Capstone is an open-source printed circuit board by COEN490-2025-CyclOps, from the COEN490-2025-CyclOps/PCB repository on GitHub. It is a 2-layer board of 100 × 79 mm with 77 parts on 78 nets, routed with 406 tracks and 63 vias.
It is built around the SN74LV1T125DBV, LM2675MX-12 and LM2678SX-5.0, with the MCP3021A5-E, TPS22917DBV and BQ77307RGRR among its other parts. Its parts include 29 capacitors, 17 resistors, 9 connectors, 8 ICs and 5 diodes.
Main components
10
SN74LV1T125DBV
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V 10uA 5.5ns@5V,15pF 74LV 8mA 8mA Tri-State Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
LM2675MX-12
SOIC-8-40℃~+125℃@(TJ) 1 12V 1A 260kHz 3.6mA 6.5V~40V Buck Buck Built-in Fixed No SOIC-8 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
LM2678SX-5.0
TO-263-7-40℃~+125℃@(TJ) 1 260kHz 4.2mA 5A 5V 8V~40V Buck Buck Built-in Fixed No TO-263-7 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersMCP3021A5-E
SOT23-5Low-Power 10-Bit A/D Converter with I2C InterfaceMicrochip TechnologyUncategorised
TPS22917DBV
SOT-23-6-40℃~+125℃ 0V~5.5V 1 2A 80mΩ Active High Load Switch Output discharge function、Soft-start、Reverse current blocking SOT-23-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
BQ77307RGRR
VQFN-20-EP(3.5x3.5)VQFN-20-EP(3.5x3.5) Battery Management ROHSTexas InstrumentsBattery Management
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
DMN6075S
SOT-23-55℃~+150℃ 1 N-channel 125mΩ@4.5V 19.5pF 247pF 350mW 3A 500mV 60V SOT-23 MOSFETs ROHSTECH PUBLICMOSFETsRA11131100
-Rocker SwitchesE-Switch
SK15
SMAUncategorisedDIOTEC
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C5, C9, C10, C18, C21, C24, C26, C29 |
| 8 | 10 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8, R9, R10, R11, R12, R13, R14 |
| 7 | 220nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C13, C14, C15, C16, C17, C19 |
| 4 | ~ | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3, TP4 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C7, C8 |
| 3 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R17, R18 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11, C25, C28 |
| 2 | 0.01uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C20, C27 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C6 |
| 2 | 1N4148W | Diode_SMD:D_SOD-123 | D3, D5 |
| 2 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | JST-ZH 2P | Connector_JST:JST_ZH_S2B-ZR-SM4A-TF_1x02-1MP_P1.50mm_Horizontal | J2, J3 |
| 2 | JST-ZH 3P | Connector_JST:JST_ZH_S3B-ZR-SM4A-TF_1x03-1MP_P1.50mm_Horizontal | J5, J6 |
| 2 | SN74LV1T125DBV | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U4, U5 |
| 2 | TPS22917DBV | Package_TO_SOT_SMD:SOT-23-6 | U2, U3 |
| 1 | 0.001 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R16 |
| 1 | 01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J9 |
| 1 | 100pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C22 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C23 |
| 1 | 10M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 22uH | Inductor_SMD:L_APV_APH2213 | L1 |
| 1 | 22uH | Inductor_SMD:L_6.3x6.3_H3 | L2 |
| 1 | BQ77307RGRR | Package_DFN_QFN:Texas_RGP0020D_VQFN-20-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U7 |
| 1 | DMN6075S | Package_TO_SOT_SMD:SOT-23-3 | Q2 |
| 1 | D_Zener | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 1 | HDR 02x20 2.54 | Connector_IDC:IDC-Header_2x20_P2.54mm_Horizontal | J4 |
| 1 | JST-XH 7P | Connector_JST:JST_XH_S7B-XH-A_1x07_P2.50mm_Horizontal | J7 |
| 1 | JST-ZH 4P | Connector_JST:JST_ZH_S4B-ZR-SM4A-TF_1x04-1MP_P1.50mm_Horizontal | J1 |
| 1 | LM2675MX-12 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | LM2678SX-5.0 | Package_TO_SOT_SMD:TO-263-7_TabPin4 | U6 |
| 1 | MCP3021 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U1 |
| 1 | NTC 10k | Connector_JST:JST_ZH_S2B-ZR-SM4A-TF_1x02-1MP_P1.50mm_Horizontal | TH1 |
| 1 | RA11131100 | TestPoint:TestPoint_2Pads_Pitch5.08mm_Drill1.3mm | SW1 |
| 1 | SK15 | Diode_SMD:D_SMA-SMB_Universal_Handsoldering | D7 |
| 1 | SK35 | Diode_SMD:D_SMB-SMC_Universal_Handsoldering | D4 |
| 1 | XT60 | Connector_AMASS:AMASS_XT60PW-F_1x02_P7.20mm_Horizontal | J8 |
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Questions
How big is the Board Capstone PCB?
It measures 100 × 79 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Board Capstone use?
77 parts, built around the SN74LV1T125DBV, LM2675MX-12, LM2678SX-5.0 and MCP3021A5-E. 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 Board Capstone KiCad files?
From the COEN490-2025-CyclOps/PCB repository on GitHub, at the commit this page was made from: the board is Board Capstone.kicad_pcb and its schematic Board Capstone.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Board Capstone design in my own project?
Its repository states no licence, so its author keeps all rights: ask COEN490-2025-CyclOps before reusing the design.