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GreekPIC

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Posts posted by GreekPIC

  5. Convert your projects in 3D mode

    in Spice Simulation - PCB design

    Posted

    Is there something similar that outputs 3D solids? I'm using Autodesk Inventor and I-DEAS which can import IDF files. Those are 3D representations of the boards (not photorealistic as this, just the basic shapes). You can then use them to model the housing, heatsinks, wire harnesses etc without guestimating.

    However Eagle doesn't output IDF. Target does but I'm not so eager to learn a second PCB layout program (I haven't really learned the first yet). So, if there's a way to output *.iges, *.sat, *.step or something like this from Eagle, it would be great.

    Nikolas

  7. Camcorder viewfinder

    in Electronic Projects Design/Ideas

    Posted


    Well, Sony has made a “few” models so you have to be more specific then someone might be able to help out here. I have manuals for Sonys CCD TRV11 (19Mb) and for the DCR-TRV30/TRV30E (15Mb) if it’s any of these. 8)


    Well, I was thinking that Sony would use a similar system for all it's camcorders. I don't have a busted camcorder to test so my question is rather general. I have an DCR-HC42 with a colour v/f but no interest in taking it apart  ;D

    SM2GXN thanks for the info

  10. schematics for a 2-axis controller

    in Electronic Projects Design/Ideas

    Posted


    Thanks.  For the Z-axis, how could I make a momentary SPDT switch turn the motor so many steps on the motor without the motor going more than that many steps if the switch is held closed?  Also, how many stemp does a normal stepping motor have in one revolution?  What could I add to the circuit to automatically turn the z-axis motor so many steps when the computer tells the cnc machine to start?


    Why don't you just make a 3-axis machine?

    I would understand it you wanted to cut down on the costs. In this case you could use a DC motor controled by a relay and limit switches.

    However if you are using 3 steppers anyhow, why don't just add the 3rd axis and be able to do 3d stuff? A circuit to send the stepper a specified amount of steps to one or the other direction at the flip of a switch would be more complicated than making the 3rd axis on the controller.

    As for the steps/revolution it depends on the motor but 200 is a fairly common number.

    Nikolas

  12. Hard dsk motor

    in Electronics chit chat

    Posted


    check this http://home.cc.umanitoba.ca/~umparekh/hard_drive_clock.html




    Well thanks but this doesn't really answer my question. This guy powers the HD and it spins up with it's own controller. But how can I use the motor alone with other electronics?

    Nikolas

  14. Hard dsk motor

    in Electronics chit chat

    Posted

    I dismantled a dead hard disk and I can't figure out the main motor. Is it a stepper? It has 4 contacts so I thought bipolar stepper. However if it was so, the two pairs should be isolated to eachother which is not the case. I tried to apply voltage in a sequence, it acts kind of like a low resolution stepper (~90

  22. relays - SPST, SPDT, DPST, DPDT?

    in Theory articles

    Posted

    Well the power circuit is just a switch, the control circuit is just what moves the lever.

    Now think of a simple On-Off switch with two connectors. It's a simple throw (one On position) simple pole switch (SPST). Two such switches operated by the same lever would be DPST.

    If it was On-Off-On it would be SPDT and DPDT respectively.

    HTH, Nikolas

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