Actions
Forum Thread Details
  • Replies 3 replies
  • Subscribers 43 subscribers
  • Views 360 views
  • Users 0 members are here
Related

Floating globe

e14 Contributor

I was thinking that a Raspberry PI with a sensor could be used to control an electro magnet to make a globe or some object float. 

Parents

  • Hi all, you could take MK's idea a step further:  You could use a STM32 disco, because it has two D/A convertors. http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF259090  Runs bare metal, freeRTOS or uclinux.

     

    If you could get a sensor that produced a voltage analog of position, you could send it to the inputs of two comparators.  The other (reference) inputs are driven by the D/As.  The outputs of the comparators feed a flip flop that drive a power switch that energizes the magnet.  The flip/flop output, or a submultiple, can interrupt the uP, if desired.

     

    This does decentralize the processor, somewhat.

     

    Comparators and F/Fs can be much faster than uP.

Reply

  • Hi all, you could take MK's idea a step further:  You could use a STM32 disco, because it has two D/A convertors. http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF259090  Runs bare metal, freeRTOS or uclinux.

     

    If you could get a sensor that produced a voltage analog of position, you could send it to the inputs of two comparators.  The other (reference) inputs are driven by the D/As.  The outputs of the comparators feed a flip flop that drive a power switch that energizes the magnet.  The flip/flop output, or a submultiple, can interrupt the uP, if desired.

     

    This does decentralize the processor, somewhat.

     

    Comparators and F/Fs can be much faster than uP.

Children
No Data