Micro_Amps I got some prob

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    • #11890
      Admin
      Participant
      • Posts: 5952

      Finnaly I could use my internet again…
      aniwai My problem is that my supra that just mosfet modified by Micro_amps,it ran well and fast, but after few days it coudl only run back not run forward. I dunno is it ur fault or not but I hope u could explain/help me or some one could help me to

    • #47816
      leonli17
      Participant
      • Posts: 602

      I think u might flip the car or drop the car a few times when u play with it. Then the forward connection might broken. Open up the car and see if the wires are all connected.

    • #47825
      micro_Amps
      Participant
      • Posts: 1290

      This is the first one that I have heard of that has had any problems at all.
      Check the gears are free and there isnt anything tangled up in the axel (a hair for example).
      Are you sure your controller is working correctly, can you prove that forward and backward are working by controlling another car with it. Sometimes this looks like a car problem but is actually a controller problem.
      Try all this and let me know.
      :)uA

    • #47887
      HACHI-RYOKU
      Participant
      • Posts: 286

      Actually, I had this problem with a car that I fet modded. Of course check the other stuff first.

      The same symptoms happend to me. I don’t know why, but I have an idea. After a couple smacks into a wall I think a piece of solder from one component started touching another component. I think I know witch one it is.

      I can’t post a pic (I’m not sure why), but take a look at a recent post called “2speed”. It has to do with a question about wire placement. Anyhow, if you look at the picture of the pcb I will point out where the solder may have started touching.

      All right, at the top right of the pcb, there is one of the fets (black rectangle). Across from that is a diode (orange tubular thingy with two white stripes). See the solder? Is it touching? That would be a short. If you can seperate it, then go for it. If not, then don’t touch it.

      After that, the other possibility is that one of the fet’s connections came a little loose. You might be able to fix it by running a soldering iron over the solder spots where the fets have been placed. That will kind of stir the solder and reset it.

      Micro-amps does some outstanding work with this stuff, real sturdy too, so I have a feeling that you may have smacked it just the right way and loosened a fet. I did order a fet modded car from micro amps and that thing is still running strong with no signs of fading out any time soon.

      Good luck, and remember to check everything else first. I had a car that wouldn’t charge once. Ended up tearing apart a dual cell and disconnected all the wires, reconected them and placed two new batteries inside. Then I realized that it was the charger’s batteries. I had left it on for days. They were deader than a door nail.

      Minor correction here, no big deal.

      Edited by – micro_Amps on 13 November 2003 00:21:58

    • #47891
      leonli17
      Participant
      • Posts: 602

      I don’t think it will be the FET connections fault. Because uA put epoxy all over it. As he said, that’s probably the strongest part of the PCB. Check everything first. Then when u run out of ideas, just take a pic of your car PCB and internals. Then people from the forum can help u.

    • #47895
      micro_Amps
      Participant
      • Posts: 1290

      :blush:

    • #47900
      leonli17
      Participant
      • Posts: 602

      I said that because my car got flipped hundreds of times and nothing broke on the PCB. So Good Work uA on the FET mod.

    • #47909
      brendan
      Participant
      • Posts: 377

      i had the same problem with my car. i thought it was the car but no wires were loose and then i figured out it was the controller the wire in the controller come loose i dunno how it done it but it did. So that might be ur problem.

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