Recent content by kxenos

  1. K

    Motherboard

    Take a look here http://blogs.arm.com/software-enablement/498-from-zero-to-boot-porting-android-to-your-arm-platform/ and here http://www.olimex.com/dev/index.html see "SAM9-L9261" under "ARM" category on the left. For buying stuff, depending on where you live, check Distrelec, Digikey, Mouser...
  2. K

    Motherboard

    ok, ok. We got it. It's not that difficult anyway. ARM processors are your best bet, I believe. Cortex M3, A7 and A9 will all do fine. Buy a development board either from a processor manufacturer (atmel, nxp, ti, nxp etc.) or an other vendor like olimex, keil iar etc. When your software is...
  3. K

    uC controlled 3.3V@2A PS unit w/ 2 cell Li-ion Li-pol charger w/ fuel gauge

    Hello, I wanted to put this project into Projects area but couldn't find the link so here it is. This schematic is part of a bigger project that was never completed. That means it's not complete, meaning that even though I believe that it will work ok, it has not been constructed. The firmware...
  4. K

    Open hardware solar power generator for developing countries

    In 5 days I'm going to Uganda. We 're going to set up a small hospital in rural village on a mountain about 4500km alt. The major problem about infrastructure there is that there is no power supply. Because of this there is no refrigerator to store medicines, the microscope I just bought will...
  5. K

    Schematic advice for a noob

    I would suggest that you start by picking a suitable servo for your application. After this you will probably want to select a driver IC suitable for your motor. In order to select the driver IC you will have to think about the system that will tell the servo to move. Is it digital? Like a uC...
  6. K

    Electronic Circuit Help

    Probably the IC that came with the kit is of wrong type. (probably someone equally unlucky will have a board with 14 holes and an IC with 8 pins, and his kit also won't work). Try to google every code the board has on it in order to find the manufacturer and send them an e-mail. :-) Konstantinos
  7. K

    USB device possible?

    If the PC doesn't already have a dev. driver for the device, your device has to send a mass storage media report so that it will be recognized as a flash drive so that the driver and/or the application can be installed. If you just want to bypass the usb lock that the admin or a script has done...
  8. K

    Voice record/playback design help

    My suggestion is: Use an ARM uC to capture, encode and store the signal into an external eeprom. Use an open source speech codec like SPEEX which is perfect for encoding speech with excellent quality into bitrates of 2kbps, 4kbps etc. With 8kbps you will have perfect results. With 8kbps audio...
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