AUDIBLE LIGHT SENSOR


Posted on Feb 6, 2014

741 opamp is connected as audio oscillator with Radio Shack 276-677 photocells in feedback circuits. When light strikes PC1, its resistance decreases and frequency of audio tone in headphone decreases correspondingly. When light strikes PC2, which is connected to noninverting input of 741, increase in illumination serves to increase frequency. Cho


AUDIBLE LIGHT SENSOR
Click here to download the full size of the above Circuit.

ose R4 to reduce volume to desired level. R3 is balancing control for photocells. -F. M. Mims, "Integrated Circuit Projects, Vol. 2, " Radio Shack, Fort Worth, TX, 1977, 2nd Ed. , p 81-86.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

TimeGen
Simplest AVR programmer
Efficient Laser Supply Circuit
how to build cell phone controlled door
Differential Light
not so tiny power meter
Cable TV amplifier
nixie tube clock circuit
Small Breakout for SIM900 GSM Module
Cold cathode fluorescent lamp CCFL power supply
Novel circuit diagram of the timer switch



Top