Optical schmitt trigger


Posted on Sep 2, 2012

This circuit shows a 555 with its trigger and threshold inputs connected together used to energize a relay when the light level on a photoconductive cell falls below a preset value


Optical schmitt trigger
Click here to download the full size of the above Circuit.

Circuit can be used in other applications where a high input impedance and low output impedance are required with the minimum component count.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Casio cable for PC
Magnetometer
Ultrasonic Pest Repeller Circuit
Arduino V-USB / HID 14 channel data logger
Hv440: High Voltage Ring Generator
Gyraf Audio EQ
Controller Area Network TDS2020F
Host computer automatic temperature control circuit
OP amplifier using FET input type long analog timing circuit



Top