| Price | $2 |
|---|---|
| Category | Sensors |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A glass reed switch on a KY-025 board, with an LM393 comparator and a ten-turn trim pot behind it. Bring a magnet within about 10-30 mm and the reed snaps closed; take it away and it opens. Worth knowing before you buy: because the reed is a mechanical switch, the A0 pin only ever sits at one of two levels - it will not tell you how strong the field is, so if you need a proportional reading you want a Hall sensor instead. Runs on 3.3-5V with power and trigger LEDs.
Key features
- Glass reed switch, normally open
- Digital D0 and analog A0 outputs
- Magnet detected at about 10 - 30 mm
- A0 swings between two levels, not proportional
- LM393 comparator with a 10-turn trim pot
- 3.3 - 5V supply, 36 x 15 x 14 mm board
Details
Specifications
| Model | KY-025 |
|---|---|
| Sensor | Glass reed switch, normally open |
| Operating voltage | 3.3 - 5V DC |
| Outputs | Digital D0 + analog A0 |
| Detection range | about 10 - 30 mm, magnet dependent |
| Comparator | LM393 with 3296W 10k trim pot |
| Indicators | Power LED + trigger LED |
| Pins | 4 (A0, GND, +, D0) |
| Dimensions | 36 x 15 x 14 mm |
