2 layers60 × 111.3 mm
Silkscreen pcb
iandchasse/silkscreen-pcb
Silkscreen: open-hardware ESP32-S3 e-paper reader mainboard (KiCad 9). Formerly the de-link hub.
189 parts589CERN-OHL-S-2.0
2 layers60 × 35 mm
Coffee scale hw
lucasnoce/coffee-scaleWeight measuring device, targeted for coffee making
- Size
- 60 × 35 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 72
- Nets
- 93
- Pads
- 255
- Tracks, vias
- 40, 0
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Jun 2026
- Updated
- 19 Jun 2026
Overview
Coffee scale hw is an open-source printed circuit board by lucasnoce, from the lucasnoce/coffee-scale repository on GitHub, published under the MIT licence. It is a 2-layer board of 60 × 35 mm with 72 parts on 93 nets, routed with 40 tracks and 0 vias.
It is built around the HX711, TLV61046ADBV and DW01A, with the TP4056-42-ESOP8 and AO3401A among its other parts. Its parts include 23 capacitors, 22 resistors, 5 ICs, 5 switches and 4 connectors. It belongs with the STM32 boards of this library.
Main components
5
HX711
SOP-16-40℃~+85℃ 1.4mA 10Hz、80Hz 1MHz~20MHz、11.0592MHz 2 2.6V~5.5V 20mV、40mV、80mV 24 Built-in External、Built-in SPI Support Yes SOP-16 Analog to Digital Converters (ADC) ROHSAvia SemiconAnalog To Digital Converters (ADC)
TLV61046ADBV
SOT-23-6-40℃~+125℃@(TJ) 1 1.05MHz 1.8V~5.5V 110uA 3.3V~28V Adjustable Boost Boost Built-in No Overcurrent Protection、Light load efficient mode、Load disconnect SOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersDW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery Management
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdcoffee-scale
Weight measuring device, targeted for coffee making
Parts
72| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 100n | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C11, C12, C14, C15, C16, C17, C19, C21, C22, C23 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R3, R7, R9, R11, R12, R13 |
| 6 | 1k | Resistor_SMD:R_0805_2012Metric | R2, R4, R8, R10, R22, R23 |
| 4 | 10n | Capacitor_SMD:C_0805_2012Metric | C5, C7, C9, C10 |
| 3 | 100R | Resistor_SMD:R_0805_2012Metric | R18, R19, R21 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C13, C18, C20 |
| 2 | R_Small | Resistor_SMD:R_0805_2012Metric | R5, R6 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R20 |
| 1 | 10SPS | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1 |
| 1 | 1k2 | Resistor_SMD:R_0805_2012Metric | R24 |
| 1 | 20k | Resistor_SMD:R_0805_2012Metric | R17 |
| 1 | 3.3uH | Inductor_SMD:L_0805_2012Metric | L2 |
| 1 | 8k2 | Resistor_SMD:R_0805_2012Metric | R16 |
| 1 | ? | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BAT_IN | MyFootprints:Terminal_Pad_01x02-3x5mm | J1 |
| 1 | C_Small | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | HX711 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | LED_CHRG | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | LOAD_CELL | MyFootprints:Terminal_Pad_01x04-2x3mm | J3 |
| 1 | L_Small | Inductor_SMD:L_6.3x6.3_H3 | L1 |
| 1 | OLED | MyFootprints:Terminal_Pad_01x04-2x3mm | J2 |
| 1 | PNP | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | Q_Dual_NMOS_S1G1D2S2G2D1 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q4 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U2 |
| 1 | SW_BACK | TFG_Footprints:SW_TS-1187A-B-A-B | SW2 |
| 1 | SW_L | TFG_Footprints:SW_TS-1187A-B-A-B | SW3 |
| 1 | SW_OK | TFG_Footprints:SW_TS-1187A-B-A-B | SW5 |
| 1 | SW_PWR | TFG_Footprints:Sliding_Switch_MK-12C02-G020 | SW1 |
| 1 | SW_R | TFG_Footprints:SW_TS-1187A-B-A-B | SW4 |
| 1 | TLV61046ADB | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U5 |
| 1 | USB_C_Receptacle_PowerOnly_24P | Connector_USB:USB_C_Receptacle_GCT_USB4125-xx-x_6P_TopMnt_Horizontal | J5 |
The 66 most common of 72 parts.
Questions
How big is the Coffee scale hw PCB?
It measures 60 × 35 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Coffee scale hw use?
72 parts, built around the HX711, TLV61046ADBV, DW01A and TP4056-42-ESOP8. 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 Coffee scale hw KiCad files?
From the lucasnoce/coffee-scale repository on GitHub, at the commit this page was made from: the board is hardware/coffee-scale-hw/coffee-scale-hw.kicad_pcb and its schematic hardware/coffee-scale-hw/coffee-scale-hw.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Coffee scale hw 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).
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