Sensors and Transistors

273

05:24:33

Objective:
A fundamental understanding of the use of transistors as a switch. Using a stable DC
power supply, interface an LDR, transistor and LED.

Outcomes:
Using a DC supply interfaced with transistor switched by a LDR, light an LED on or off
based on the amount of light present.

Pre-lab questions:
Based on the 2N3904 datasheet, what is the max Beta (hfe) of the transistor?

Light Dependent Resistor-electronic component whose resistance changes with the intensity of light that falls on it. 

***Note: Put LDR where variable resistor is the led should fade up when full dark and fade off when light you will get a indication of how dark the environment is the brighter the led more darker the environment this circuit is a rough guide

published 6 months ago

Muzaffer

5 months ago

I cant active ldr, how can i active it.

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