Goes well with this
| Price | $2 |
|---|---|
| Category | Sensors |
| Availability | Currently unavailable |
| Delivery | Shipped across Lebanon, or collect from the lab |
An NTC thermistor bead on a KY-028 board with an LM393 comparator behind it. A0 gives a raw analog voltage that falls as the bead warms, and D0 flips over when the temperature crosses whatever point you dial in on the blue trim pot - so it can switch a fan or a buzzer with no code at all. Two LEDs show power and trip state. Worth knowing: the bead is uncalibrated, so if you want actual degrees you convert the analog reading in software.
Key features
- NTC thermistor with LM393 comparator
- Analog A0 plus digital D0 threshold output
- Trim pot sets the trip temperature
- Power LED and trip LED onboard
- 3.3 - 5V supply, 4-pin header
- For fans, alarms and simple thermostats
Details
Specifications
| Model | KY-028 |
|---|---|
| Sensor | NTC thermistor, bare bead |
| Operating voltage | 3.3 - 5V DC |
| Outputs | Analog A0 + digital D0 |
| Comparator | LM393, over 15 mA drive |
| Threshold | 3296W trim pot |
| Indicators | Power LED + trigger LED |
| Pins | 4 (A0, GND, +V, D0) |
