2 layers44 × 44 mm
2 layers75.7 × 80.9 mm
Nocodephprobe
cristoper/nocodephmeter3A pH meter for use with inexpensive pH probes (for gardening, home experiments) with temperature compensation and digital readout but no microcontroller
- Size
- 75.7 × 80.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 71
- Pads
- 215
- Tracks, vias
- 586, 43
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 26 May 2023
- Updated
- 21 Jun 2023
Overview
Nocodephprobe is an open-source printed circuit board by cristoper, from the cristoper/nocodephmeter repository on GitHub, published under the MIT licence. It is a 2-layer board of 75.7 × 80.9 mm with 52 parts on 71 nets, routed with 586 tracks and 43 vias.
It is built around the TLV272D, 74HC2G86DP and ICL7106CPL, with the LM393, VI-302-DP-RC-S and BAV199 among its other parts. Its parts include 20 resistors, 15 capacitors, 6 ICs, 5 diodes and 2 connectors.
Main components
7
TLV272D
SOIC-8-40℃~+125℃ 145dB 2 2.7V~16V 2.8V/us 200pA 2pA 2uV/℃ 30nV/√Hz@1kHz 3MHz 3mV 410uA 60mA Rail-to-rail output SOIC-8 Operational Amplifier ROHSonsemiOperational Amplifier
74HC2G86DP
TSSOP-8-40℃~+125℃ 1.5V、3.15V、4.2V 100mV、260mV、400mV 11ns@4.5V,50pF 2 2 20uA 2V~6V 4.18V、4.4V、5.9V 4mA 4mA 500mV、1.35V、1.8V 74HC XOR Gate TSSOP-8 Logic Gates ROHSNexperiaLogic Gates
ICL7106CPL
DIP-400℃~+70℃ 3.5 5V Built-in reference source、Low noise front-end DIP-40 ADCs/DACs - Special PurposeTexas InstrumentsADCs/DACs - Special Purpose
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparatorsVI-302-DP-RC-S
THroughholeTHroughhole LCD Screen ROHSVaritronix International Ltd.LCD Screen
BAV199
SOT-231 Pair Series Connection 1.25V@150mA 160mA 4A 5nA@75V 85V SOT-23 Diodes - General Purpose ROHSNexperiaDiodes - General PurposeBAT54-QR
SOT-23UncategorisedNexperia
README
readme.mdThis is a pH meter with temperature compensation and digital readout (but no microcontroller) created as part of Hackaday's 2023 Op-Amp Challenge. It is still under active development. For more information see it's project page:
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R4, R5, R7, R10, R11, R12, R16, R18, R19, R20 |
| 11 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 |
| 3 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9, R17 |
| 3 | BAV199 | Package_TO_SOT_SMD:SOT-23 | D2, D3, D4 |
| 2 | 10k | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | RV1, RV2 |
| 2 | BAT54-Q | Package_TO_SOT_SMD:TSOT-23_HandSoldering | D1, D5 |
| 1 | .047uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | .22uF | Capacitor_THT:C_Rect_L18.0mm_W6.0mm_P15.00mm_FKS3_FKP3 | C5 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 1 | 100pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 10K | STX-3120-3B:KYCON_STX-3120-3B | J2 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15 |
| 1 | 1n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 4.64k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 470k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 1 | 6.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 74HC2G86 | Package_SO:TSSOP-8_3x3mm_P0.65mm | U6 |
| 1 | 9V | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | BAT1 |
| 1 | BNC (pH Probe) | Connector_Coaxial:BNC_Amphenol_031-6575_Horizontal | J1 |
| 1 | ICL7106CPL | Package_DIP:DIP-40_W15.24mm | U2 |
| 1 | LM393 | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U5 |
| 1 | MCP1501T-10E/CHY | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | SW_SPST | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | SW1 |
| 1 | TLV272 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | VI-302-DP-RC-S | Display_7Segment:DE113-XX-XX | U4 |
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Questions
How big is the Nocodephprobe PCB?
It measures 75.7 × 80.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Nocodephprobe use?
52 parts, built around the TLV272D, 74HC2G86DP, ICL7106CPL and LM393. 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 Nocodephprobe KiCad files?
From the cristoper/nocodephmeter repository on GitHub, at the commit this page was made from: the board is nocodephprobe.kicad_pcb and its schematic nocodephprobe.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nocodephprobe design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).