2 layers130 × 24 mm
EspressoSensorBoard
jcohenadad/espresso-pimpup
DIY project to pimp up my espresso machine to display various measures
16 parts1MIT
2 layers59 × 35.5 mm
Hydration Tracker
Dom-Taing/Hydration-TrackerThe goal of this product is to track how much water a user drink in a day. The sensor device would be a sleeve that can be worn onto a water bottle, it'll detect the water level in the bottle and convert that into…
- Size
- 59 × 35.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 20
- Pads
- 45
- Tracks, vias
- 60, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Jan 2026
- Updated
- 9 Feb 2026
Overview
Hydration Tracker is an open-source printed circuit board by Dom-Taing, from the Dom-Taing/Hydration-Tracker repository on GitHub. It is a 2-layer board of 59 × 35.5 mm with 16 parts on 20 nets, routed with 60 tracks and 0 vias.
It is built around the FDC1004DGSR. Its parts include 6 ICs, 2 capacitors, 2 resistors and 1 connector.
Main components
1README
Readme.mdHydration Tracker (Sensor + Display)
The goal of this product is to track how much water a user drink in a day. The sensor device would be a sleeve that can be worn onto a water bottle, it'll detect the water level in the bottle and convert that into volume of water. The display device would be a box where the gauge will measure if the user reach daily hydration goal.
Overall form factor (concept sketch):
- Sensor device: sleeve that can be worn onto a water bottle (water level sensing + BLE)
- Display device: small desktop box with a water-drop window and NeoPixel gradient + top button
The look and form factor of the product
Slide 2 — Sensor device (water level + BLE)
The look and form factor of the Sensor device
It's 4 rod containing the capacitive water level sensor connected with a stretchy fabric to wrap around the bottle.
How it works
- The sensor device measures water level using a No Contact Capacitive water level sensor.
- The ESP32-C3 reads the digitized water level, filters noise, computes volume (consumed water), and save the data.
- It then sends updates to the display using Bluetooth Low Energy (BLE) when it's connected.
Key parts (with part numbers)
- Water sensor: We'll be building our own using a copper strip + high value resistor + laminated sheets.
- MCU: ESP32C3
- Battery: Lipo Battery
Slide 3 — Display device (NeoPixel gauge + Wi-Fi + button)
The look and form factor of the display device
How it works
- The display device runs an ESP32C3 that:
- Connects to the sensor over BLE to receive weight/consumption updates
- Move the motor to reflect current consumption toward daily goal
- Updates the NeoPixel gauge behind a water-drop window (green→yellow→red)
- Syncs daily usage to the cloud over Wi-Fi
- Holding the top button will tare/calibrate the sensor for an empty bottle
Key parts (with part numbers)
- MCU: ESP32C3
- LED gauge: XL-5050RGBC-WS2812B
- Battery: Lipo Battery
- Boost regulator: TPS61023
- Button: PTS636
- Motor: 28BYJ-48 – 5V Stepper Motor
Slide 4 — Communication + system flow (2 figures)
Figure A: Device communication (block diagram)
Diagram displaying how the device communicates
Figure B: Detailed data flow (how the system works)
Diagram displaying how the data flows in the system
Repo structure
README.mdimages/datasheets/- (PDFs for each part)
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | ~ | TestPoint:TestPoint_Pad_D1.0mm | U3, U4, U5, U6 |
| 2 | 4.7K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | Battery | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | BT1 |
| 1 | FDC1004DGSR | footprints_FDC1004:DGS0010A_M | U7 |
| 1 | RFShield_OnePiece | TestPoint:TestPoint_Pad_D1.0mm | J1 |
| 1 | ~ | GIX_ESP32:XIAO_ESP32 | U1 |
The 12 most common of 16 parts.
Questions
How big is the Hydration Tracker PCB?
It measures 59 × 35.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hydration Tracker use?
16 parts, built around the FDC1004DGSR. 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 Hydration Tracker KiCad files?
From the Dom-Taing/Hydration-Tracker repository on GitHub, at the commit this page was made from: the board is Kicad/hydration_tracker/hydration_tracker.kicad_pcb and its schematic Kicad/hydration_tracker/hydration_tracker.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hydration Tracker design in my own project?
Its repository states no licence, so its author keeps all rights: ask Dom-Taing before reusing the design.
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