Build an Op Amp Bargraph Light Meter

Oh, this one is about LED bargraphs, and you know I love LEDs. In this experiment we are going to build an LED bargraph and then use that bargraph to measure how much light is hitting the photoresistor. In essence, we are going to build an LED bargraph light meter!

Please login or register to read the rest of this content.

Have a question ?
Tell us what you're thinking...

You must be logged in to post a comment.

Comments

2 Responses to “Build an Op Amp Bargraph Light Meter”

Aurora says:

at

Hmmm… it plays through to 7:32 here. Try again?
Shiralee Seerden says:

at

why dose the video stop at 5:55

	Push Button Switch
	Use The DPDT Switch
	Control 4 LEDs
	Connect Two Switches in Series
	Connect Two Switch in Parallel
	Use The Relay to Control The Buzzer Experiment 1
	Use The Relay to Control The Buzzer Experiment 2
	Use a Relay as an Electromagnetic Buzzer
	Build a Fixed Voltage Divider
	Build an Adjustable Voltage Divider
	Build an LED Brightness Control
	Build a Light-Activated Light
	Build a Simple LED Flasher
	Build a 555 “Black Box”
	Use a Potentiometer to Change
	Use a Photoresistor to Change
	Use an Adjustable Voltage Diver to Change The Tone Frequency
	Use a Light-Sensitive Voltage Divider
	Use Resistors And a “Keyboard” to Control The Tone Frequency
	Make the Buzzer a Chirper and Warbler
	Use Capacitors to Generate
	Use Capacitors and a “Keyboard
	Use an Adjustable RC Circuit to Create
	Use a Switched RC Circuit
	The Console LED Digital Display
	Use the 7-Segment LED
	Transistors and How to Use Them
	Build an NPN Transistor Circuit
	Drive a Relay With a Transistor
	Build a Simple Two-Transistor Oscillator
	Resistors and How to Use Them
	Troubleshooting Problem Circuits
	Build a Two-Transistor Dual-LED Flasher
	Build a Power FET to Control the Brightness
	Build a Power FET Timer
	Build a Power FET
	Analog ICs Provided
	Build a Super-Sensitive Op Amp
	Add a Signal Strength Indicator
	Add a Sound Level Meter
	Build a Percussion Instrument Synthesizer
	Comparators and How to Use Them
	Build an Experimental Op Amp Audio Oscillator
	Build an Op Amp Tone Mixer
	Build an Op Amp Bargraph Light Meter
	Build a Buzzer Triggered by Light or Darkness
	Build an 8-Level LED Bargraph Readout
	555 Timer Circuits
	Build a Voltage Controlled Oscillator
	Build a Programmable Timer
	Build a Fully Adjustable Siren
	Digital Logic Experiments

Have a question ?Tell us what you're thinking...

Comments

2 Responses to “Build an Op Amp Bargraph Light Meter”

Have a question ?
Tell us what you're thinking...