| ??? 04/28/08 06:45 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#154073 - Things to consider... Responding to: ???'s previous message |
Amit Mittal said:
even if the output of photo-detector is not changed How do you know that its output has not changed - how have you measured it? If you're using a meter (analogue or digital) it will probably be averaging its reading... You need to ensure that your measurement has at least the same resolution as your software... Look carefully for noise... data displayed on lcd changes every time conversion process is started. This could be due to: or a combination of the above Are the changes related to anything else in your system; eg, if you remove the stepper motor and/or keypad, does it settle down? If that does fix it, you need to determine whether it's software corrupting the data internally, and/or electrical interference occurring externally... |
| Topic | Author | Date |
| fluctuations in adc0804 output | 01/01/70 00:00 | |
| Things to consider... | 01/01/70 00:00 | |
| circuit diagram and program uploaded | 01/01/70 00:00 | |
| where are the decoupling caps | 01/01/70 00:00 | |
| You have to protect the reference input! | 01/01/70 00:00 | |
| Regarding 0.1 uf capacitor and reference voltage | 01/01/70 00:00 | |
| Considor Following | 01/01/70 00:00 | |
| Zener? | 01/01/70 00:00 | |
| reasons for suggesting zener. | 01/01/70 00:00 | |
and so what? | 01/01/70 00:00 |