2 layers60 × 30 mm
Controller
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
11 parts3kApache-2.0
2 layers28.1 × 18.5 mm
PH Meter
zemonkey/pH_MeterA pH Meter frontend with fA level input current using LMP7721
- Size
- 28.1 × 18.5 mm
- Copper layers
- 2
- Thickness
- 1.69 mm
- Parts
- 11
- Nets
- 10
- Pads
- 39
- Tracks, vias
- 83, 6
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 19 May 2022
- Updated
- 14 Jun 2022
Overview
PH Meter is an open-source printed circuit board by zemonkey, from the zemonkey/pH_Meter repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 28.1 × 18.5 mm with 11 parts on 10 nets, routed with 83 tracks and 6 vias.
Its parts include 4 resistors, 2 capacitors, 2 ICs and 2 connectors.
README
README.mdpH_Meter
A pH Meter with very low input current using LMP7721
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 12k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3 |
| 2 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 1 | 1.5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | Conn_01x04_Male | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | Conn_Coaxial | Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J1 |
| 1 | Jumper_3_Open | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | JP1 |
| 1 | LMP7721MA/NOPB | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | Opamp_Dual | Package_SO:MSOP-8_3x3mm_P0.65mm | U1 |
Questions
How big is the PH Meter PCB?
It measures 28.1 × 18.5 mm and has 2 copper layers, 1.69 mm thick.
What parts does the PH Meter use?
11 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 PH Meter KiCad files?
From the zemonkey/pH_Meter repository on GitHub, at the commit this page was made from: the board is pH_Meter.kicad_pcb and its schematic pH_Meter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PH Meter design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 2 layers103 × 30.5 mm
- 2 layers26 × 30 mm
Expansion Card
FrameworkComputer/ExpansionCards
Reference designs and documentation to create Expansion Cards for the Framework Laptop
11 parts1.1kCC-BY-4.0 - 2 layers53.9 × 23.2 mm
Buffer
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
11 parts1kGPL-3.0 - 2 layers10 × 20 mm
2 connector Sensor Board
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
11 parts915 - 2 layers
- 2 layers47 × 33 mm
Sevensegment led display module
tardate/LittleArduinoProjects
a collection of "Little Electronic & Arduino Projects", most involving electronics or an Arduino in one way or another!
11 parts803MIT - 2 layers42.5 × 36.8 mm
Devboard
basilfx/TRADFRI-Hacking
Hacking IKEA TRÅDFRI products, such as light bulbs, window blinds and other accessories.
11 parts743CC-BY-4.0