Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.

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 :(