EM06 · Sem 5 · Sensors & interfacing
LM35 temperature sensor and UART
Aim: Measure temperature with an LM35 and print it on the serial port and LCD.
🧪 Live simulation🧊 Real-time 3D bench⚠ Simulated values, not physical measurements
🔬 Virtual lab
Starting the lab…
📘 Theory
The LM35 outputs 10 mV per °C. The ADC reading × (5000/1023) gives millivolts; divide by 10 for °C. The value is printed on UART and on the LCD.
T(°C) = reading × 500 / 1023
🧰 Apparatus (virtual)
- Dev board
- LM35 on A1
- 16×2 LCD
📝 Procedure
🎤 Viva questions
What is the LM35’s output at 25 °C
250 mV.
Why average several readings
To reduce noise.
🛡️ Safety
Virtual board. On real hardware, check supply voltages and pin current limits, and power motors and servos from a separate supply.