Timeline for answer to Level of a water tank with a microcontroller by ttt
Current License: CC BY-SA 2.5
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6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 1, 2016 at 13:15 | comment | added | ttt | In testing I just used a piece of bent wire to latch on to the float arm. In the toilet cistern the arm is square-section plastic so it would be really easy to drill a small hole to make the attachment. | |
| Sep 1, 2016 at 13:06 | comment | added | ttt | A lot of the longer slider pots have very low friction (used in finger-tip controlled mixers and DJ decks). I used a 4" slider from my bits box and tested it with a normal water tank float. It even worked on a smaller toilet cistern float! By the way, I would use a fixed resister in series with the pot so that even if it shorts in a wet environment it wont exceed the output of a controller port (or draw too much current from a fixed Vref). I used a 10k resister with a 10k pot in my test setup. | |
| Aug 30, 2016 at 21:32 | comment | added | user41391 | Not so sure about that. Finding the correct weight of the float such that it floats in the presence of water and drops the pot in the absence of water is not so easy. Most pots have a fairly high static friction. I guess it is possible, however, given the right mechanical setup. | |
| Aug 29, 2016 at 12:49 | comment | added | ttt | The weight of the float will pull it down when water level drops... | |
| Aug 17, 2016 at 19:21 | comment | added | user41391 | How do you make sure the pot goes back to its original position? | |
| Apr 29, 2010 at 9:13 | history | answered | ttt | CC BY-SA 2.5 |