| ??? 07/27/07 15:00 Read: times |
#142432 - Isn't the wheel already marked? Responding to: ???'s previous message |
Jan Waclawek said:
The only thing I would try to do is to paint half of the wheel mat black, and build some sort of optical reflection sensor. We haven't had a mechanical meter for ages, so I can't go and check, but I'm sure they always used to have a little black mark on the edge of the wheel to that you could see it turning & count the revs yourself. Shouldn't be hard to detect this optically? "retro-reflective" is your search term... |
| Topic | Author | Date |
| prepaid energy meter help | 01/01/70 00:00 | |
| read out the revs | 01/01/70 00:00 | |
| everybody and his brother | 01/01/70 00:00 | |
| Isn't the wheel already marked? | 01/01/70 00:00 | |
| like this | 01/01/70 00:00 | |
| usually it is... | 01/01/70 00:00 | |
| Use a laser pointer to read wheel | 01/01/70 00:00 | |
| I would not do this... | 01/01/70 00:00 | |
I got the impression... | 01/01/70 00:00 |