4 layers24.4 × 24.4 mm
OSO SWAT C1
joeycastillo/Sensor-Watch
A board replacement for the classic Casio F-91W wristwatch
40 parts2.1k
4 layers100 × 100 mm
Standalone pi loop
matterwaves/standalone_pi_loop2- Size
- 100 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 26
- Pads
- 126
- Tracks, vias
- 94, 7
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 16 Oct 2024
- Updated
- 4 Jul 2025
Overview
Standalone pi loop is an open-source printed circuit board by matterwaves, from the matterwaves/standalone_pi_loop repository on GitHub. It is a 4-layer board of 100 × 100 mm with 40 parts on 26 nets, routed with 94 tracks and 7 vias.
Its parts include 12 capacitors, 11 connectors, 8 resistors and 2 ICs.
Parts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C4, C5 |
| 4 | 10u | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C8, C9, C10, C11 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H3, H4, H5, H6 |
| 3 | 10n | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C3, C6, C7 |
| 2 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 2 | 47R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R7 |
| 2 | 500k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV2, RV3 |
| 2 | Conn_01x10_Pin | Connector_JST:JST_ZH_B10B-ZR_1x10_P1.50mm_Vertical | J1, J2 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | 1n | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C12 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 3k3 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | AD620 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U2 |
| 1 | AD823 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U1 |
| 1 | Alt input | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J9 |
| 1 | Alt out | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J8 |
| 1 | Conn_01x05 | Connector_Wire:SolderWire-0.75sqmm_1x05_P4.8mm_D1.25mm_OD2.3mm | J4 |
| 1 | PI input select | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J11 |
| 1 | R_{gain} | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | Setpoint | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J7 |
| 1 | V-sense | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J3 |
| 1 | Vout | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J10 |
| 1 | pot+ | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | pot- | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
Questions
How big is the Standalone pi loop PCB?
It measures 100 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Standalone pi loop use?
40 parts. 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 Standalone pi loop KiCad files?
From the matterwaves/standalone_pi_loop repository on GitHub, at the commit this page was made from: the board is standalone_pi_loop.kicad_pcb and its schematic standalone_pi_loop.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Standalone pi loop design in my own project?
Its repository states no licence, so its author keeps all rights: ask matterwaves before reusing the design.
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