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  • Users: JohnDW
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  1. JohnDW

    Automotive Electronics Protection Circuit - best Practice?

    Hi Guys, I would appreciate your thoughts on the following. Looking for a gerneral purpose design that will provide protection and 5 volt regulator for use in Automotive microcontroller applications. The holy grail would have a small foot print on the PCB, pretty bulluit proof and a sensbile...
  2. JohnDW

    PCB Layout for multiple SPI devices.

    Hi, Working on my first project that has multiple slave SPI devices served by a single microcontroller. When laying out the PCB tracks for the SPI control lines between the devices what are best design practices? Do I simply; Daisy-chain the control lines between the devices. Leave absolute...
  3. JohnDW

    How to reverse Permanent magnet Syncronous Motor

    Hi, I need to reverse the rotation of a synchronous permanent magnet motor. We do not have control of the DC to AC (PWM) inverter so cannot simply select reverse in software. As such we would like to attempt to wire the motor and sensors 'backwards' to achieve reverse. The motor is designed to...
  4. JohnDW

    Reversing a 3 phase Synchronous Interior Permanent Magnet Motor

    Hi, I need to reverse the rotation of a synchronous permanent magnet motor. We do not have control of the DC to AC (PWM) inverter so cannot simply select reverse in software. As such we would like to attempt to wire the motor and sensors 'backwards' to achieve reverse. The motor is designed to...

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