PeterP

Member Since: March 29, 2007

Country: United States

  • So it appears that while the Curie module on the Tinytile has battery charging circuitry, the functionality was not included on the board. According to this thread: “The reason why the battery charging feature was not implemented on the Arduino 101 is because the standard Arduino I/O pin layout does not have the provision for a battery charger. External hardware is needed for multiplexing the charger interface to the standard I/O pin.”

    This module is so, so close to the perfect IoT/wearable sensor with on-board pattern rec, BLE, and motion sensors but ultimately misses the mark. It would have been simple to break out the necessary pins for charging a small lipo battery. The really frustrating thing is that the reason the battery charging circuitry was left off the board shows that the designers have a basic misunderstanding of how the board would likely be used.

    https://communities.intel.com/thread/112898

  • I know I’m a little late to the party, but in the past I’ve fixed this mistake with a tiny piece of polymide tape such as PRT-10687 on the board.

  • It’s not sturdy at all. I have to redo a board because these connectors are popping their landing pads off the board at the slightest amount of stress. Moving to a through hole micro B part.

  • Thanks! Ignore the customer service email I just sent.

  • The link to the STK Experiment Guide and the Getting Started button both return 404 errors.

  • That’s quite a Caucasian sausage club.

  • For folks thinking about attaching a second load cell here’s some datasheet info on channel B. It is not quite as sensitive as channel A.

    Channel A differential input is designed to interface directly with a bridge sensor’s differential output. It can be programmed with a gain of 128 or 64. The large gains are needed to accommodate the small output signal from the sensor. When 5V supply is used at the AVDD pin, these gains correspond to a full-scale differential input voltage of ±20mV or ±40mV respectively.

    Channel B differential input has a fixed gain of 32. The full-scale input voltage range is ±80mV, when 5V supply is used at the AVDD pin.

  • I have to admit that instead of using these FTDI boards, I usually use a a Teensy 2.0 programmed as a USB to serial converter. Its a buck or so difference in price but then I can always build some smarts into the converter to suit my application.

  • Any plans for an HMC5983 breakout? The 250hz update rate would be nice! It is mostly the same pinout but don’t forget to run pin 6 to a solder pad so we can select SPI/I2C.

    Also check out the MLX90333 hall effect sensor. It does all the math internally tio implement a hall effect joystick.

  • I’ve been playing with one of these for a couple days and found some quirks. I’ve been using the Teensy for awhile so most of this is in comparison. This is using Arduino 1.0 with the SparkFun Pro Micro Driver. The board is identified as Leonardo.

    There is no easy way to enter the bootloader. You have to connect the VCC to the adjacent RST pin. This connection needs to be maintained the entire time the bootloader is operational. If you disconnect the pin, the device immediately disconnects from the host. This is very annoying if board is not on a breadboard and doubly so if you already have a wire soldered to the VCC hole. I’m going to have to wire in a switch or something.

    The Teensy has a an on-board momentary switch that you press to enter the bootloader. There is no requirement that the switch remain pressed the entire time.

    I also attempted to convert my board to 3.3V operation by clearing the jumper next to the micro USB port. No luck. The voltage regulator doesn’t turn on and no power can be detected past the regulator.

No public wish lists :(