Brightness display circuit 555


Posted on Nov 10, 2015

As shown for the brightness display circuit. The circuit consists of light-sensitive sensor, an oscillation circuit, LED display circuit. Wherein the light-sensitive


Brightness display circuit 555
Click here to download the full size of the above Circuit.

sensor that is photosensitive resistance Rd. Of the multivibrator Rd, R1, W1, R2, C1,555 composed. The oscillation period of kitchen charge + 7 = f women. Where T charge = 0.693R2C1, t put = 0.693 (Rw1 + R1) Rd / (Rw1 + R1 + Rd) C1. Due to changes in light intensity Rd with two Ju different resistance, so that the oscillation frequency f = 1 / T is changed, the oscillation waveform duty ratio D = t charge / T also changed. When the light intensity and oscillation frequency increases, the duty ratio becomes smaller, the oscillation signal and the corresponding end (A, B, C, D) through IC2 (CD4011) after driving the corresponding light emitting diode operating, the LED brightness increases.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

100W Class-A//AB Amplifier
Data acquisition system
Positive-triggered-monostable
Voltage-to-frequency-converter
Compound Op Amp Vco Driver
ultrasonic motion detector
Battery Level Monitor Circuit
Home-Built Dye Laser
ic lm338 application circuits explained
RFID Readers for the HDX Protocol
Two-channel Analog-to-Digital converter board with USB interface
Feld-Hell electronic circuitry and schematics
A typical laptop power adapter circuit



Top