Adafruit 1766 Vibration Switch Notes
Extracted part information
- Manufacturer: Adafruit Industries LLC
- Manufacturer part number: 1766
- Digi-Key part number: 1528-1766-ND
- Product name: Fast Vibration Sensor Switch (Easy to Trigger)
- Function: non-directional spring-vibration trigger switch. When moved, the internal spring touches the center pole and the two leads behave like a closed switch. When still, the switch is open.
- Switch type: SPST, normally open, unpolarized two-terminal switch
- Pin count: 2
- Suggested schematic pin names: 1 and 2, or SW1 and SW2. The datasheet/product page does not provide formal pin names.
Electrical characteristics from the retrieved datasheet/product data
- Maximum voltage: 12 V
- Maximum current: 20 mA
- Contact resistance: 10 MΩ
- Operating temperature: -40 °C to 80 °C
- Operating lifespan: 100,000 cycles
Mechanical / footprint information
- Mounting type: through-hole
- Package/case: radial can
- Body diameter: 5 mm / 0.2 in
- Height with pins: 25 mm / 1 in
- Height without pins: 15 mm / 0.6 in
- Weight: 0.3 g
- Exact PCB lead pitch / recommended land pattern: not specified in the retrieved DigiKey/Adafruit data.
Flux implementation used
I added S3 using a library SW-18010P two-pin through-hole vibration switch as a placeholder/substitute because I did not find an exact Adafruit 1766 Flux library part. S3 has properties set to identify it as Adafruit 1766 / Digi-Key 1528-1766-ND and includes an uncertainty note.
Uncertainties to verify before fabrication
- Exact lead pitch and drill diameter for Adafruit 1766 were not available in the retrieved datasheet text.
- The placed library substitute footprint may not mechanically match Adafruit 1766 exactly.
- The part is unpolarized, so either terminal can be used as the signal or ground side.
- The contact pulse is short, around 2 ms, so the receiving circuit may need debounce or pulse-stretching depending on how it is used.
Recommended schematic usage
Use S3 as a normally-open switch input. A typical connection is one terminal to the sensed node and the other to GND, with a pull-up resistor on the sensed node. Since this project is based on a recreated schematic, I left S3 unwired until you confirm where it should connect, for example to TRIP, BATTERYCUTOFF, OUTPUT, or another input node.