Member #196941

Member Since: January 20, 2011

Country: United States

  • Product TOL-09235 | about a year ago

    Can this guy be reprogrammed as an ISP for AVR micros?

  • Product DEV-11017 | about 2 years ago

    I’m betting that wireless programming is going to require a special bootloader on the FIO v3 since the Leonardo bootloader is reset by changing the baud rate on the USB port. If we can force a hardware reset with a cap on DTR like the old FIO then we can probably load code over Serial1 (RXI, TX0). Too bad that cap didn’t make it into v3.

    The ATmega32U4 actually has 12 analog inputs, though only 10 are broken out on the FIO v3. A10 and A11 are used for battery level and charge status. The others are shared on digital pins: A6 = D4, A7 = D6, A8 = D9, and A9 = D10.

    Also, it will do differential input with a programmable amplifier up to 200x gain. Maybe we can measure thermocouples directly.

  • Product DEV-11017 | about 2 years ago

    Not only is it on all the time, but at 3.6V it’s drawing 1.8 mA. With the old FIO + xbee I can get the sleep current down to 0.045 mA. 1.8 mA from this voltage divider would blow that out of the water. They should have used 1M resistors instead of 1K.
    Also, on the 328p, once the battery voltage gets close to 3.3V the analog pins aren’t accurate anymore, but the chip will still run. The readings start to increase as the voltage falls. However, if you use the internal 1.1V analog reference, then it’s still reasonably accurate. But then you’d need probably a 1/5 divider instead of ½.

  • Product SWG-11046 | about 2 years ago

    The pictures show 2 different models of glasses. Which one is it?

  • Product DEV-10711 | about 2 years ago

    The Arduino FIO has a built in LiPo charging circuit. If only someone would make some shields for the FIO.

  • Product DEV-10116 | about 3 years ago

    U2 is the 3.3V voltage regulator. Try applying your 8V at the “BAT” terminals. If it works then it’s U1 that you blew. I had the same thing happen to me when trying to use 9V batteries.

  • Product DEV-10116 | about 3 years ago

    I’m having some problems with power consumption during sleep modes.
    current consumption while in sleep mode:
    FIO w/o XBee = 0.045 mA
    XBee w/o FIO = 0.25 mA
    FIO + XBee = 0.75 mA!
    The only changes I’ve made to the schematic is the addition of jumpers from FIO D2 and D3 to XBee DTR and CTS for sleep and ready status. Does anyone know how I can get the current down to the ~0.300mA I think I should be getting?
    Thanks

  • Product WRL-09087 | about 3 years ago

    I have an Xbee shield, XSC Xbee, and a 5V Arduino. I could receive cleanly, but anything sent was received as a zero (0x00).
    The diode on the DIN pin was the problem for me and many others.
    See these other forum posts:
    http://forum.sparkfun.com/viewtopic.php?f=13&t=21832
    http://www.societyofrobots.com/robotforum/index.php?topic=9790.0
    My solution was to replace the diode with a 100 ohm resistor. 500 ohm also worked.
    I prototyped a voltage divider to get 3.3V instead of 5V, but the XSC data sheet says it can handle up to 5.5V on DIN. So, I just used the resistor to limit the current.

  • Product WRL-09086 | about 3 years ago

    I have an Xbee shield, XSC Xbee, and a 5V Arduino. I could receive cleanly, but anything sent was received as a zero (0x00).
    The diode on the DIN pin was the problem for me and many others.
    See these other forum posts:
    http://forum.sparkfun.com/viewtopic.php?f=13&t=21832
    http://www.societyofrobots.com/robotforum/index.php?topic=9790.0
    My solution was to replace the diode with a 100 ohm resistor. 500 ohm also worked.
    I prototyped a voltage divider to get 3.3V instead of 5V, but the XSC data sheet says it can handle up to 5.5V on DIN. So, I just used the resistor to limit the current.

  • Product WRL-09085 | about 3 years ago

    I have an Xbee shield, XSC Xbee, and a 5V Arduino. I could receive cleanly, but anything sent was received as a zero (0x00).
    The diode on the DIN pin was the problem for me and many others.
    See these other forum posts:
    http://forum.sparkfun.com/viewtopic.php?f=13&t=21832
    http://www.societyofrobots.com/robotforum/index.php?topic=9790.0
    My solution was to replace the diode with a 100 ohm resistor. 500 ohm also worked.
    I prototyped a voltage divider to get 3.3V instead of 5V, but the XSC data sheet says it can handle up to 5.5V on DIN. So, I just used the resistor to limit the current.

No public wish lists :(