| ??? 05/09/11 17:50 Modified: 05/09/11 17:56 Read: times |
#182208 - Thank You Very Much Responding to: ???'s previous message |
I selected 100nf for C,and 100K for R1,Because a 10k pot decreases signal level before opamp stage,then i put a 100k pot instead of r2,
the best value for r2 with good gain and without undershoot obtained approximately 45k, here is a print screen of final test, hot side is soldering iron in 1 meter distance, actual distance is 27 meter,and the output is not calibrated yet, thanks Again For your valuable help in this thread,Kai  |
| Topic | Author | Date |
| Datasheet question???? | 01/01/70 00:00 | |
| where | 01/01/70 00:00 | |
| High pass filter... | 01/01/70 00:00 | |
| pulsed light | 01/01/70 00:00 | |
| "typo" | 01/01/70 00:00 | |
| Thanks Andy | 01/01/70 00:00 | |
| chopping... | 01/01/70 00:00 | |
| DC Offset | 01/01/70 00:00 | |
| But gain is different for AC and DC! | 01/01/70 00:00 | |
| But gain is different for AC and DC? | 01/01/70 00:00 | |
| C reduces the gain for DC | 01/01/70 00:00 | |
I understood much more about this sensor | 01/01/70 00:00 | |
| Thank You Very Much | 01/01/70 00:00 |