24000
Ohms

500
Ohms

Adjusting the LDR Voltage Divider Circuit

 

 

0.2

Variable Resistor
Variable ResistorAdjuster

Move the arrow pointer to change the transistor base voltage and switch it on.

Vertical slider


.

 

 
LDR

VR1
Variable
Resistor
Value

LDR Sensor
Resistance
Value

Variable Resistor
Circuit Diagram
Multimeter
Full Sunshine
Night Time zzzzzz
Cloudy and Overcast

VLDR
Voltage from input subsystem, measured on base input (b)
of transistor Tr1.

 VLDR < 0.7 volts - The transistor
"electronic switch" is now OFF.