Op amp F003 composition of automatic exposure timer circuit


Posted on Mar 28, 2007

As shown in Figure II F003 is versatile photographic constituent operational amplifier amplifying automatic timer circuit. Operational amplifier A1 composition integrator


Op amp F003 composition of automatic exposure timer circuit
Click here to download the full size of the above Circuit.

operational amplifier A2 composed of comparators. 2CR silicon photocell voltage is generated by the integrator input signal V1, the signal input from the pin , Al output voltage with the reference voltage to the comparator comparison. When the output voltage is equal to the upper limit threshold voltage comparator Ems, A2 comparator output is high, the transistor VT conduction, relay, lamp, and the end of exposure, exposure time so as to achieve automatic control purposes. Ems by a 10k potentiometer setting, the exposure time T = R1C1Ems / V1. S switch to automatic, manual switch. AN integrator reset button for the switch.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

400-Volt 60-watt push-pull power supply
Pulse-Frequency Modulated Receiver
ac-motor-control-circuits
Circuit schematicof 1.25G optical transceivers SSFF315l
Simplest Piezo Driver Circuit Explained
Checking out the Pierce oscillator
Geiger Counter
Fridge Door Alarm Schematic 2nd Version
AD1865 based audio DAC with I2S input and voltage output
4-Bit Computer



Top