25-04-2017, 23:08
Hi,
This is a bad sign. You should try to fix it as soon as possible, don't keep the unit running until this issue is fixed. Under normal conditions the 3.3V regulator runs barely warm.
The first thing to check it power supply voltage, make sure it is no more than 9V.
Also, make sure that you always have connected the 9V external power supply before connecting the USB cable to the Meduino board. Failing to it that, will destroy your board. Please carefully read this info:
1 - http://www.meteocercal.info/forum/Thread...een-warned
2 - WeatherDuino Pro2 PLUS Receiver - Notes about Assembling and Power On
No, it's not normal. It should run silently.
The wiring to the display is good otherwise it doesn't work, however perhaps the cable is too long. Usually SPI signals doesn't like long cables, especially parallel cables. Try to reduce the length of the cable to no more than 15cm. Hope this works, but the fact that the 3.3V regulator is running hot, makes me think on a worse case. Hope I'm wrong.
Quote:- The RX+'s 3.3V linear regulator (IC3) and its metal pad (heatsink I assume?) on the PCB get very hot to the touch, too hot for me to touch for long - is that normal?
This is a bad sign. You should try to fix it as soon as possible, don't keep the unit running until this issue is fixed. Under normal conditions the 3.3V regulator runs barely warm.
The first thing to check it power supply voltage, make sure it is no more than 9V.
Also, make sure that you always have connected the 9V external power supply before connecting the USB cable to the Meduino board. Failing to it that, will destroy your board. Please carefully read this info:
1 - http://www.meteocercal.info/forum/Thread...een-warned
2 - WeatherDuino Pro2 PLUS Receiver - Notes about Assembling and Power On
Quote:- The RX+ makes a bit of ticker-ticketty noise (a bit like a spinning hard drive seek noise) when it responds to an http request over the wifi network to serve up its weather page. It will probably be muffled a bit when the RX+ is in a box, hopefully not enough to be annoying in a quiet room, but again, is this normal?
No, it's not normal. It should run silently.
Quote:- Finally, and perhaps most importantly, if I don't touch the system for a while, the "big digit" clock mode kicks in. If I then leave it for longer, a couple of hours, say, or overnight, when I come back, the display is corrupted. The text and drawn boxes etc are reversed and rotated 90 degrees from what they should be. Then, if I touch the screen:
- sometimes it redraws the summary screen and goes back to working fine again
- other times, it draws the new screens also rotated 90 degrees and reversed text. It does still seem to be working ok otherwise, though - I can cycle through the screens and see them being updated to the TFT - it's just all scrambled on the screen.
Had anyone else seen this and can anyone suggest a cause? I'd be grateful if anyone could help.
I'm going to try placing the TX further away, and see if the screen glitch still happens.
As you'll see in the photos, the ribbon cable is about 25cm long, and runs 10cm from the TX unit (could be interfering with the serial connection to the screen?). I've wired the screen up following instructions in Wizza's build thread (thanks!). I didn't make a connection to the SDO (MISO) pin on the LCD, as per Wizza.
The wiring to the display is good otherwise it doesn't work, however perhaps the cable is too long. Usually SPI signals doesn't like long cables, especially parallel cables. Try to reduce the length of the cable to no more than 15cm. Hope this works, but the fact that the 3.3V regulator is running hot, makes me think on a worse case. Hope I'm wrong.