开云体育

The only other case I'm aware of where a Raduino died during calibration is that referenced in posts 20959 and 20906. ?John Smith says he may have had one of the spare wires short to the heatsink (which I assume is 12v), and blow something, which is very welcome information as we try to figure this out. ?But I don't think that was it, as it was his A7 Nano pin that blew, and that would have been firmly attached to the tuning pot. ?So we really don't know why that failed yet. ?Most likely that A7 pin would need to short to 12v to get damaged like that, though it's possible that shorting to the neighboring 5v tab of the pot could do it. ?Any further hints from Helmut or John of what might have happened would be most appreciated. ?

Elsewhere in history here these last couple weeks, somebody mentioned that having to reflash an Arduino in other environments is not unusual. ?That should not be the case, and if that's happening with the Raduino we need to track it down. ?For starters, never hot plug those wires, power everything down when moving wires around and double check your work before powering up, put tape over the ends of any flying leads. ?Keep wires reasonably short. ?Somebody with a scope should look hard at the 5v supply rail around that Raduino at power-up and power-down especially, perhaps we need another cap out there to avoid some ringing. ?Perhaps shorting 5v to ground and then letting it go is causing overshoot.

Here's my notes regarding what Ashhar Farhan's sketch is doing with the pins:

#define ANALOG_KEYER (A1)
#define CAL_BUTTON (A2)
#define FBUTTON (A3)
#define PTT   (A6)
#define ANALOG_TUNING (A7)

#define TX_RX (7)
#define CW_TONE (6)
#define CW_KEY (5)
#define TX_LPF_SEL (4)

The current wire-up is only using the CAL_BUTTON and ANALOG_TUNING from that set of 9 pins.
All but TX_LPF_SEL have code that reference them in the sketch, so should be considered used.

Here's the pins for the 16x2 display:
  LiquidCrystal lcd(8,9,10,11,12,13);
I assume the SCL and SDA pins are set up down in Jason's Si5351 library.

I had recommended John Smith use A6 as his replacement ANALOG_TUNING pin based on this comment:
 * A6 is to implement a keyer, it is reserved and not yet implemented
but actual code shows a conflict with PTT.  He might want to move PTT to A0 if there's trouble.

Jerry, KE7ER