Member #1190468

Member Since: October 26, 2017

Country: United States

  • Im testing the board with analogWrite and there appears to be a serious problem. First, running the Fade example on pin 4, 5, 9 or 10. The PWM duty cycle stops after the first ramp up.

    Changing to pin 0, 1, 2, 3, 6, 7, 8 stops the lock-up however, there seems to be some issue with the timings. Toggling a pin every loop round shows that the loop time jumps between 30ms and 33ms.

    Additionally, the PWM frequency is only 185Hz. I don't know if this is intended or not but I was expecting at least the same 500Hz as an Uno.

    This is all pretty poor behaviour for a new board and not encouraging for anything more complicated than analogWrite.

  • I'm using the board to prototype for a product. I'm a little confused by the schematic, the inductor L1 is in series with the antenna and a capacitor, C5, to ground. Looking at spec sheets AN231 and AN383 this appears to be incorrect. The inductor should be connected from the antenna to ground, therefore forming a resonant LC circuit with the antenna capacitance. On the eval board, with amp and headphone socket the inductor is placed correctly. I just wanted to check that I am not missing something and that this is an error?

No public wish lists :(