| Gallery, Projects and General > Neat Stuff |
| Micro DRO made from tyre tread depth gauge |
| << < (18/27) > >> |
| Pete.:
Yes you can. You can use any length scale you can find. Longest I heard of was 1.5m. |
| ksor:
--- Quote from: Pete. on August 25, 2011, 10:47:54 AM ---... any length scale ... --- End quote --- Yeah, but just a peace of aluminum ? How does this work - it must have something to do with the pattern on the PCB and maybe small current circles induces in the aluminum or ... ? |
| John-Som:
Forget about springs - the adaptation is easier than we all thought. As Aussie Jim pointed out why not simply put a magnet on the end of the probe. I am showing Mk l and Mk ll versions on my website and soon we will have Aussie Jim's Mk lll version on show. John-Som |
| BillTodd:
--- Quote from: ksor on August 25, 2011, 10:52:30 AM --- --- Quote from: Pete. on August 25, 2011, 10:47:54 AM ---... any length scale ... --- End quote --- Yeah, but just a peace of aluminum ? How does this work - it must have something to do with the pattern on the PCB and maybe small current circles induces in the aluminum or ... ? --- End quote --- No, the slide has to have a pattern of conductive pads (it cannot be just plain) the sensor is capacitive see: http://madmodder.net/index.php?topic=4444.msg48960#msg48960 |
| ksor:
I've tried with a peace of ordinary aluminum and it worked - the digits changed as I moved the aluminum and was fixed when I hold it still. |
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