EE 312: Electrical Systems Name: Daniel Conley
Spring 2017
Project Report
Objectives:
1. Use mathematical and conceptual reasoning to construct a light detecting circuit using an
LDR and resistors that power an LED when placed in a position where light cannot reach
the LDR.
2. Use mathematical and conceptual reasoning to construct a temperature sensitive circuit
using a thermistor and resistors that power an LED exposed to heat.
Parts Used:
• Breadboard
• 6V battery
• Electrical wires
• Red LED
• 10kΩ resistor
• LDR
• Thermistor
• 2.2kΩ Resistor
Design:
LDR Circuit:
(a) (b) (c)
Figure 1: Experimental Design of LDR Light Sensing Circuit with
(a) circuit diagram
(b and c) breadboard set-up
Thermistor Circuit:
(a)
(b)
(c)
Figure 2: Experimental Design of Thermistor Heat Sensing Circuit with
