Hi all,
I'm currently making a line robot that needs to follow a maroon track with white background. The sensors used is OPB704, optimum distance from ground is about 0.5cm.
But the problem is, I can only get about 0.5V of voltage difference from the collector when it is changed from the white background to the maroon track.
Furthermore, the track is expected not to be flat, meaning the distance between the sensor and the ground would be changing.
Any idea of solving this problem?
Thanks in advance