Capcore
About the Capcore PCB
Capcore is an open source PCB design by alph4345, published on GitHub. It is a 4-layer board measuring 21 × 48 mm, with 65 components from 33 distinct parts.
Other key parts include the USBLC6-2SC6, BQ25173DSGR, TPS3808G01DBVR, TPS63031DSKR and PCF8563T/5,518. By type, the board carries 28 resistors, 14 capacitors, 8 transistors, 5 ICs, 4 diodes and 3 connectors.
It belongs with the power & battery designs in this gallery.
From the project
CapCore is a 21 × 48 mm board that does the power side of a small gadget, with a supercapacitor where a LiPo would normally go. Plug in USB-C and it charges the capacitor. Press the button and it turns your circuit on and feeds it a steady 3.3 V. When the capacitor is empty it tu
CapCore is a 21 × 48 mm board that does the power side of a small gadget, with a supercapacitor where a LiPo would normally go. Plug in USB-C and it charges the capacitor. Press the button and it turns your circuit on and feeds it a steady 3.3 V. When the capacitor is empty it turns everything off and stays off until USB comes back.
Renders of the actual Gerber layers. The capacitor is not shown; it solders into the pads at the bottom left.
Main components on the Capcore
Capcore bill of materials (BOM)
65 components, 33 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | USBLC6-2SC6 | SOT-23-6 | U1 |
| 1 | BQ25173DSGR | WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm_Vias0.3 | U2 |
| 1 | TPS3808G01DBVR | SOT-23-6 | U3 |
| 1 | TPS63031DSKR | WSON-10-1EP_2.5x2.5mm_P0.5mm_EP1.2x2mm_Vias0.3 | U4 |
| 1 | PCF8563T/5,518 PCF8563T | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 3 | AO3401A | SOT-23 | Q1, Q5, Q7 |
| 5 | AO3400A | SOT-23 | Q2, Q3, Q4, Q6, Q8 |
| 1 | Q13FC1350000400 32.768kHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | TYPE-C-31-M-12 USB-C | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | LEFT | PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | RIGHT | PinHeader_1x08_P2.54mm_Vertical | J3 |
| 1 | TS-1187A-B-A-B POWER | SW_TS-1187A_5.1x5.1mm | SW1 |
| 1 | KT-0603R RED | LED_0603_1608Metric | D1 |
| 3 | 1N4148WS | D_SOD-323 | D2, D3, D4 |
| 1 | ANR3015T1R5N 1.5uH | L_3015_Universal | L1 |
| 1 | CL21A475KAQNNNE 4.7uF | C_0805_2012Metric | C1 |
| 1 | CL10A106KP8NNNC 10uF | C_0603_1608Metric | C2 |
| 2 | CL05B103KB5NNNC 10nF | C_0402_1005Metric | C3, C7 |
| 5 | CL05B104KO5NNNC 100nF | C_0402_1005Metric | C5, C10, C13, C14, C15 |
| 1 | CL05A105KA5NQNC 1uF | C_0402_1005Metric | C6 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CL10A225KO8NNNC 2.2uF | C_0603_1608Metric | C8 |
| 3 | CL21A106KAYNNNE 10uF | C_0805_2012Metric | C9, C11, C12 |
| 2 | 0402WGF5101TCE 5.1k | R_0402_1005Metric | R1, R2 |
| 3 | 0402WGF1001TCE 1k | R_0402_1005Metric | R3, R6, R25 |
| 1 | 0402WGF1203TCE 120k | R_0402_1005Metric | R4 |
| 1 | 0402WGF3302TCE 33k | R_0402_1005Metric | R5 |
| 1 | 0402WGF1005TCE 10M | R_0402_1005Metric | R7 |
| 3 | 0402WGF1002TCE 10k | R_0402_1005Metric | R8, R21, R22 |
| 4 | 0402WGF1003TCE 100k | R_0402_1005Metric | R9, R17, R20, R23 |
| 8 | 0402WGF1004TCE 1M | R_0402_1005Metric | R10, R14, R15, R16, R18, R24, R26, R27 |
| 1 | 0402WGF4703TCE 470k | R_0402_1005Metric | R11 |
| 2 | 0402WGF3303TCE 330k | R_0402_1005Metric | R12, R13 |
| 2 | 0402WGF4701TCE 4.7k | R_0402_1005Metric | R28, R29 |
Capcore design files
The KiCad project lives in the alph4345/test repository on GitHub; these links point at the commit this page was built from.
Capcore: common questions
How big is the Capcore PCB?
The Capcore measures 21 × 48 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Capcore?
65 components, from 33 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 Capcore design files?
From the alph4345/test 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 Capcore design in my own project?
The repository has no license, so all rights stay with alph4345. Use it as a reference, and ask the author before reusing the design.
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