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Recent content by millerdr

  1. M

    How to interface ports in Matlab?

    matlab Yes, First you create a serial port object and pass parameters such as: s = serial('COM1'); or s = serial('COM1','BaudRate',4800,'Parity','even'); then connect to the device with: fopen(s) then use fprintf(s,'*IDN?') and out = fscanf(s) to read/write. Hope this helps...
  2. M

    Looking for a C Compiler for PC

    C Compiler Try downloading cygwin and you can run gcc from that. It is free and a powerful environment.
  3. M

    [REQ] Quaternion Mathematics eBook

    This may not help much but try https://mathworld.wolfram.com and search for quaternion. Hope that you are boned up on linear algebra. This form of vector manipulation is used today in almost any navigation system you put together. This math allows our ICBM missiles to hit their mark.
  4. M

    how mobiles Vibrate ????

    how to mobiles vibrate The motor is usually driven from a simple MOSFET driver circuit, where the motor is put in series with a MOSFET with a protection diode. Look up the H-bridge this circuit is slightly more complicated but should show the general idea of how the motor is driven.
  5. M

    What type of converter is needed for rs232 <=>ttl (3.3

    Re: Help max232 If you only need one channel try the ADM101E from analog. Small foot print and needs one charge pump cap.
  6. M

    which PCB designer program to use?

    I agree with wahabmalik. Orcad Layout Plus is nice especially when used in cooperation with capture. The only thing is that the drawing tool is akward at first. Haven't used much else but thats my two cents.
  7. M

    Using SPI on AVR without losing ISP functionality

    SPI on AVR Yes you can do this but the ISP needs to be sufficiently protected from the application circuitry. You can do this with a D-latch type chip or some other means of isolation.

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