Hi,
This is my first post in this great forum and i need your assistance. Before pointing out my problem, i will just say that i am very newbie to electronics. Kindly don't offend on my silly questions:
Attached picture is a part of the Sun Tracker sensor based on Red 5mm crystal clear LED. Each LED generate 1.48 VDC when exposed to bright sunlight. The circuit designer has told me to calibrate the sensor with following procedure:
Make both LEDs under bright light and then use the trimpot to get the output voltage zero. I have tried the method, but their is no change on the output voltage with full rotation of 5K pot. I have further explain the circuit in the attached file.
Please help me. Whats i am doing wrong?
This is my first post in this great forum and i need your assistance. Before pointing out my problem, i will just say that i am very newbie to electronics. Kindly don't offend on my silly questions:
Attached picture is a part of the Sun Tracker sensor based on Red 5mm crystal clear LED. Each LED generate 1.48 VDC when exposed to bright sunlight. The circuit designer has told me to calibrate the sensor with following procedure:
Make both LEDs under bright light and then use the trimpot to get the output voltage zero. I have tried the method, but their is no change on the output voltage with full rotation of 5K pot. I have further explain the circuit in the attached file.
Please help me. Whats i am doing wrong?
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