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These are the lab reports for subject EDC for year 2026 onnwards

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ELECTRONIC DEVICES & CIRCUITS LAB
EXPERIMENT NO. 3 — LDR, PHOTODIODE AND LED CHARACTERISTICS



AIM
1. Obtain the characteristics of an LDR. 2. Obtain the characteristics of a photodiode. 3. Obtain the characteristics of an LED.

PART 1 — LDR
Component Spec / Qty
LDR / 10kΩ Resistor 1 No. each
Power Supply (0–30V), Voltmeter, Ammeter 1 No. each
Breadboard, Wires As required
.
Circuit Diagram:




Observations:
Sr. AC Voltage (Intensity) Resistance (Ω)
1 5 3K Ω
2 10 2.1 KΩ
3 15 2.6 KΩ
4 20 3.8 KΩ
5 30 5.3 KΩ
6 40 0.2 KΩ
7 Room light 11.5 KΩ


Graph (Intensity vs Resistance)

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