Thanks DTrain, that's basically been my thinking re a short-circuit on the shield - that info about the fuse pretty much confirms it. I had a quick look at the shield yesterday and nothing jumped out but I'll take the display panel off this afternoon and go over it properly.That black chip that you've circled is a voltage regulator. I'm guessing that's getting hot because there is too much current being drawn through it.
If it only happens when the shield is attached, then it's probably because something on the shield is drawing too much current. Maybe something has short circuited somewhere.
Edit: That green chip that is marked 5 X 5 where the X is a weird squiggle thing, is actually a resettable fuse. That's supposed to break the circuit when you draw more than 500mA through it. Once it cools down then it reconnects the circuit again. That fuse is probably saving you from having magic smoke come out of the board somewhere else.
Is your hand or any other object resting against the LCD pin solder points whilst it is running?Hey guys,
Just finished my Ardbir box. Thanks to everyone for all the great info. I ordered the PCBs from pcbway, by terragedy ones, cheers for making them available.
When I put power on it works fine, then after around 10 seconds the screen fills with white squares.
If I’m i get to manual mode quick enough, and use the pump and Heat buttons the corresponding ssr works as it should, even though the screen is all whacked. I played around with the contrast pot and if I tone it down it works for longer but will eventually loose parts of characters and become unreadable. Also when I dial the contrast down the top left 3rd of the screen is a lot dimmer than the rest.
I’ve played around with the power supply voltage and it doesn’t seem to change anything...
any ideas? I’m thinking possibly/hopefully just a defective screen. All components bought off Ali express.
When your trying toWell it was working. But now when i turn on the temp says 0.0c. When I plug the thermometer in it goes straight to 84.3c and doesn't respond at all to temp changes. When I unplug the thermometer it remains at 84.3c.
I've reloaded software, and checked soldering on plug. Any ideas??
I went from super stoked with this thing to starting to feel frustrated, would be awsome to get it going properly.
When you've been doing these tests with the serial monitor that show the probe works okay on your computer, is it with the probe plugged into its socket, or directly connected to the board?Just an update, I followed these instructions https://randomnerdtutorials.com/guide-for-ds18b20-temperature-sensor-with-arduino/ but changed to read from pin D7 on the arduino to test the DS18B20.
Serial monitor works fine and displays the current temperature on my computer monitor.
Anyone think it could be another dodgy display? It works normal apart from the unresponsive and high temp.
nzbrad, I think by what you just said you've probably got the probe wired up properly already. I see the BrewManiacEx can cater for monitoring multiple temperature probes so maybe there's a software setting that needs setting differently, but I'm just guessing. The problem with 99% of these problems is they're usually really quick fixes but can take weeks to track down even when the answers out on the internet.Real_Beer, thanks for that really helpful post. When I ran the test with the serial monitor it was with the probe plugged into its socket. Tomorrow I will try switching the two wires around for the temp probe. Fingers crossed!
I have a suspicion that maybe something is going on with my circuit causing the LCD to go crazy, considering the 20x4 display shat itself, and the current 16x2 one seemed to be working normally for the first half our or so.
And failing that I will have a real good look through all the boards and see if i can find someone with the same problem.
I'm thinking I might just hook up a STC until I can get this sorted.. Or I could just keep using my inlaws grainfather... But it's way more fun making beer on a home made setup .