LM35 Analog Temperature Sensor
by TI / generic
SKU: PSA-CMP-LM35
No reviews yetTypical India street price
₹25–₹60
Linear 10 mV/°C analog temperature IC — no library required.
Interface: Analog
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Concept
Voltage proportional to Celsius.
A little theory
Bandgap + amp. Vout = 10 mV × T(°C). At 25 °C ≈ 250 mV. In the classroom, treat LM35 Analog Temperature Sensor as a beginner part using Analog. Typical India street price is about ₹25–₹60. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Read ADC, convert: T = (mV) / 10. On 5 V 10-bit: T ≈ analogRead * 0.488.
Classroom & project use
- Fever-meter demo (not medical)
- Heat alarm
- Sensors classroom demo
Buying in India
Precautions
- Check 3.3 V MCU compatibility before connecting signal pins
- Share a common GND with the microcontroller
Specifications
| Scale | 10 mV/°C |
| Range | 0–100 °C typical use |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 4–30V (typically 5V) |
| Interface | Analog |
Pinout
VCC | GND | AO (and DO if comparator module)
