Water-Alarm-PCB-
About the Water-Alarm-PCB-
Water-Alarm-PCB- is an open source PCB design by avnishkandula, published on GitHub. It is a 2-layer board measuring 30.1 × 36 mm, with 8 components from 8 distinct parts.
By type, the board carries 2 connectors, 2 resistors, 1 transistor, 1 buzzer, 1 diode and 1 capacitor.
From the project
Water Alarm PCB designed in KiCad and built/tested.
The circuit works as an automatic switch that activates upon contact. After a 9V battery is plugged in, current moves through the VCC highway to three places.
1. The first path leads to the LED D1 and a resistor R2. The current fights through the resistor, powers the LED and flows into ground. This stays on constantly regardless of the actual water alarm. 2. The 9V of pressure also travels through to the positive pin of the buzzer BZ1. However, to reach ground and actually complete the circuit, it must pass through the MOSFET transistor Q1. This leaves the current trapped at the buzzer. 3.…
Water-Alarm-PCB- bill of materials (BOM)
8 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 4878-2N7000 2N7000 | TO-92L_HandSolder | Q1 |
| 1 | CP-037A Jack-DC | BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | 2057-EBAA-02-C Screw_Terminal_01x02 | TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_Horizontal | J2 |
| 1 | 668-1652 Buzzer | Buzzer_D30mm_H20mm_P15mm_668-1652-ND_Al-3035-TT-12V-R | BZ1 |
| 1 | 1830-1017 LED_Small_Filled | LED_D5.0mm | D1 |
| 1 | 56-K102K10X7RH5UL2 1nF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1 |
| 1 | CF18JT10M0 10M | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1 |
| 1 | CF18JT10M0 6.8K | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2 |
Water-Alarm-PCB- design files
The KiCad project lives in the avnishkandula/Water-Alarm-PCB- repository on GitHub; these links point at the commit this page was built from.
Water-Alarm-PCB-: common questions
How big is the Water-Alarm-PCB-?
The Water-Alarm-PCB- measures 30.1 × 36 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Water-Alarm-PCB-?
8 components, from 8 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-Alarm-PCB- design files?
From the avnishkandula/Water-Alarm-PCB- 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-Alarm-PCB- design in my own project?
The repository has no license, so all rights stay with avnishkandula. Use it as a reference, and ask the author before reusing the design.