[clubjoker]

- When the big clock screen kicks in, the 3.3V reg cools down so it's just a bit warm to the touch even though the TFT is on (this was a surprise to me!)
- Press the push button PB1, back to the summary screen, and the 3.3V regs gets HOT

If you did that experience after 8PM, the explanation is simple: Between 8PM and 8AM (or based on the Solar Radiation value, if available), the backlight level is automatically reduced when the Big Clock is shown, so less current is draw from the 3.3V regulator.

That makes sense. Yes, it was after 8pm in the evening, and I can see that the backlight is dimmer with the big clock display than when the weather screens are displayed. Strange how it seems to make such a big difference to the regulator temp when the TFT backlight is dimmed slightly - the temp of the regulator seems to be sensitive to the extra power draw.

What about the voltage regulator on the Meduino board. Is it hot too? It shouldn't.

I've just checked and the regulator on the Meduino board is hot too. That one is hot when the TFT backlight is on and also when the TFT light is off.


I've also today received the step-down buck converter, set it to 9.0V and tested with that supplying the Pro2+ RX. Same issues with the regulators running hot:

Conditions:
buck converter to 9V

Observed:
TFT light on: RX+ 3.3V reg hot, Meduino reg hot
TFT light off: RX+ 3.3V reg a bit warm, Meduino reg hot

Now this is strange because otherwise everything seems to be functioning fine, except for the display corruption, which I haven't seen yet today.

Any ideas on what to check next?