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Recent content by MrUmunhum

  1. M

    I need to control signal generator through PC by sending it instructions via RS232

    what do you mean "control"? are you talking about GPIO?
  2. M

    Raspberry Pi, reboot fails with extern power to USB drive

    OK. Find the problem. It was the KingWin USB enclosure. Change to Sabremt enclosure and everything works now.
  3. M

    solar powered 10 to 20 vdc to reg 12vdc converter

    I found the right power supply on Ebay, they are called Boost and/or Buck converters.
  4. M

    [MOVED] how to choose Raspberry for an emdedded Linux operation

    The Pi has an HDMI interface that should work for you?
  5. M

    Raspberry Pi, reboot fails with extern power to USB drive

    Hi group, Hope this is the right group? I have a Raspberry Pi running Wheezy with an external hard drive that is powered by an external power supply. It fails to reboot because the Pi turns off the hard drive while coming down and fails to turn it back on. I have researched this problem to...
  6. M

    Need IC to store old state

    I don't want to use a uC.
  7. M

    Need IC to store old state

    Hi group, I need to create an interrupt on a state change of a GPIO pin. I'm thinking something like the attached circuit but I don't know which IC to use. I don't want to use a Micro CPU. The circuit will use an XOR IC to detect a change of state, then trigger the Sync pulse and store the new...
  8. M

    solar powered 10 to 20 vdc to reg 12vdc converter

    Hi group, I need to run an IOmega IConnect in my solar powered NOC. It requires 12 vdc. My batteries have a range of 10.5 (dead) to 14vdc. Any ideas?? Thanks for your time.

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