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javelin stamp getting too hot — Parallax Forums

javelin stamp getting too hot

josh_ozjosh_oz Posts: 9
edited 2009-09-15 22:11 in General Discussion
Hello everyone, I am currently having one problem with one of my javelin stamps. One of the javelin does not allow programs to be downloaded to it and when attempting it gets very hot. I tried with the other one and it did not get too hot and it did allow programs to be downloaded to it! Anyone knows what may be the problem and how I can fix it?
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Comments

  • Peter VerkaikPeter Verkaik Posts: 3,956
    edited 2009-09-15 22:11
    I would suspect the onboard regulator to deliver too much current
    due to a short. You can measure the voltage between pin 21 (VDD) and pin 23 (VSS)
    which should be 5V. Try to keep Vin (pin 24) as low as possible (6-7.5V).

    If the problem is possibly the regulator itself (when you can't find an obvious short after
    inspecting the module), you can try to power the javelin with 5V via its pin 21
    but in that case make sure pin 24 is not connected to anything.

    regards peter
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