Water sensor cutoff
About the Water sensor cutoff PCB
Water sensor cutoff is an open source PCB design by cyberknet, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 70 × 70 mm, with 34 components from 20 distinct parts.
Other key parts include the XL1509-5.0E1. By type, the board carries 13 resistors, 5 connectors, 4 transistors, 3 diodes, 3 capacitors and 2 LEDs.
It belongs with the iot & wireless, sensors and power & battery designs in this gallery.
From the project
Water sensor and cutoff for HomeAssistant using an ESP32 DevKitC board
A DIY leak-detection and shutoff controller. It watches a leak probe near a water source and automatically closes a motorized ball valve on the supply line if a leak is detected, integrates with Home Assistant via ESPHome, and can also be driven manually with a front-panel illuminated button.
- A leak probe (simple 2-wire contact/conductivity sensor) sits near the base of a potential water source. If it detects water, the board closes the valve automatically. - A motorized ball valve actuator on the supply line does the actual shutoff. The board drives it via a relay and reads its built-in…
Main components on the Water sensor cutoff
Water sensor cutoff bill of materials (BOM)
34 components, 20 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XL1509-5.0E1 XLSEMI(芯龙) | C61063_SOIC-8_L5_0-W4_0-P1_27-LS6_0-BL | U1 |
| 4 | AO3400A AOS | C20917_SOT-23-3_L2_9-W1_3-P1_90-LS2_4-BR | Q1, Q2, Q3, Q4 |
| 2 | DS1023-1X15SF11 CONNFLY | C7509525_HDR-TH_15P-P2_54-V-F | J1, J2 |
| 1 | 2541WV-06P HanElectricity(瀚源) | C5383115_HDR-TH_6P-P2_54-V-M | J3 |
| 1 | DB142R-5.08-7P DORABO(地博电气) | C2898714_CONN-TH_7P-P5_08_DIBO_DB142R-5_08-7P | J4 |
| 1 | DB142R-5.08-2P-GN DORABO(地博电气) | C52942255_CONN-TH_4P-P5_08_DB142R-5_08-2P-GN | J5 |
| 1 | DC-470-2.1GP GANGYUAN(港源) | C194407_DC-IN-TH_DC-470-2_1GP | DC1 |
| 1 | SRD-05VDC-SL-C 松乐 | C35449_RELAY-TH_SRD-XXVDC-XL-C | K1 |
| 1 | NCD0805R1 国星光电 | C84256_LED0805-RD | LED1 |
| 1 | KT-0805G KENTO | C2297_LED0805-R-RD | LED2 |
| 2 | SS34 MDD(辰达半导体) | C8678_SMA_L4_3-W2_6-LS5_2-RD | D1, D2 |
| 1 | 1N4148W ST(先科) | C81598_SOD-123F_L2_7-W1_6-LS3_8-RD | D3 |
| 1 | 68UH 68uH SXN(顺翔诺) | C9393_IND-SMD_L5_0-W5_0_SMNR5040 | L1 |
| 1 | 1UF 1uF SAMSUNG(三星) | C15849_C0603 | C1 |
| 2 | 100UF 100uF HRK(鸿瑞凯电子) | C2983553_CAP-SMD_BD6_3-L6_6-W6_6-FD | C2, C3 |
| 4 | 100Ω UNI-ROYAL(厚声) | C22775_R0603 | R1, R2, R3, R9 |
| 1 | 2.2KΩ UNI-ROYAL(厚声) | C4190_R0603 | R4 |
| 1 | 820Ω UNI-ROYAL(厚声) | C23253_R0603 | R5 |
| 4 | 10KΩ UNI-ROYAL(厚声) | C25804_R0603 | R6, R7, R8, R10 |
| 3 | 220Ω UNI-ROYAL(厚声) | C22962_R0603 | R11, R12, R13 |
Water sensor cutoff design files
The KiCad project lives in the cyberknet/water-sensor-cutoff repository on GitHub; these links point at the commit this page was built from.
- LayoutWater Cutoff.kicad_pcb
- SchematicWater Cutoff.kicad_sch
- BOMproduction/bom.csv
Water sensor cutoff: common questions
How big is the Water sensor cutoff PCB?
The Water sensor cutoff measures 70 × 70 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Water sensor cutoff?
34 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Water sensor cutoff design files?
From the cyberknet/water-sensor-cutoff repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Water sensor cutoff design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
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