Hi, I am noticing large temperature drift when the circuit is heated, the temperature of the sensed object doesn't noticeably affect the raw count. For example;
Count dry | output | Count wet | output | y=mx+b | ||
Temp | x1 | y1 | x2 | y2 | m | b |
20 | 965 | 500 | 822 | 1000 | -3.496503497 | 3874.125874 |
35 | 858 | 500 | 742 | 1000 | -4.310344828 | 4198.275862 |
Is there anyway to reduce this drift with changes in circuit design? What would be the biggest causes of temperature drift? Clock frequency? Bulk Capacitor?
Cheers
Rick