So I’ve got the Panda II and the connect shield (running latest firmwear), really an amazing combo for the amount of things you can do with them!
Unfortunately, there are several traps I’ve run into along the way of getting my project working. Posting to maybe help someone else in the same situation and humbly suggest some possible improvement.
First, I have a sensor attached that needs exactly 5v, which I think would be a common problem. Any less than 5v and it starts acting funny. I’ve found that the 5v rail is typically 4.5-4.7 which is not enough for this sensor. The voltage never gets to 5v even if I’m powering from 9v. I even connected a 5.3v charger I had through usb (queue yelling at me for doing this) just to see if I could fudge it and man did the board not like that, the connect shield lit up like a chirstmas tree (ALL the lights turned on), fun easter egg or melting something?
Ok throw out powering through USB, will use the Vin to power the sensor as it can tolerate up to 12v. Found a spare 9v switching power supply 9v. Hey everything is working… for a little bit, then system unresponsive… Oh I’ve created a microcontroller bbq, both the connect shield and the parent board get extremely hot! OK my fault, searched the forums and it turns out in the connect shield only likes 6-7.5v.
So I’ve got a bench supply running 7.5 and the wiznet chip still gets a bit hot nearing 50 C but hasn’t locked up so far (and I see 50c is well within specs). Time to find one online.
TL;DR: 5vUSB = my porridge is too cold. 9v power plug = my porridge is too hot (literally). 7.5v is just… bearable
So for noobs like me it would be really nice if this was possibly stated as a requirement on the purchase page (I know it’s on the bottom of page 2 in the docs but this is supposed to be Freakin EZ :)) or if it could be fixed possibly in the panda III’s regulator so I could just use an easy to find 9v (or even better 12v) source? And why is my 5v rail never 5v? (at least according to my RSR multimeter)
Feel free to correct where I’m wrong and thanks for reading!