I have just completed building a project using an Arduino Nano 33 IOT but "fried" it when I started it up
I had connected the power supply to the peripheral devices to the 5V terminal and I now realise that I should have used the 3.3V terminal
I have obtained a replacement Nano 33 IOT and have rewired the power supplies but I am curious as to whether there is any established test procedure that I can conduct before startup to protect against this kind of error - it can get a bit expensive !
Hi, welcome to the forum.
Try posting your connection diagram and/or a picture of the setup (wiring).
A thousand eyes will then check if you have done it right.
Image of wiring attached.
VIN = +12V DC power (red) from power supply
GND = 0V DC (black) from power supply, linked to "-" bus on breadboard
+5V = output to "+" terminal of 10 relays (red); "-" terminals of relays to "-" bus on breadboard (not shown)
A2 to A5 = signal wiring from 4 off DS18B20 temperature sensors (yellow) with 4.7Kohm resistors to "+" bus on breadboard
A0, A1 = signal wiring from 2 off YF-DN40 flow sensors (yellow)
3V3 = link to "+ve" bus on breadboard
D2 to D11 = to "S" terminals on 10 relays(white)
Welcome
Your topic has been moved to the correct category.
Are you saying you are powering 10 5volt relays from the V-USB pin
The Nano33IOT doesn't have a 5volt output AFAIK, it's just USB power pass-through,
and not capable of powering 10 sugar-cube relays.
Post a link to the relay module.
Why didn't you use 12volt relays, powered directly from the 12volt supply.
The DS18B20 is a "one-wire bus" sensor. They could have all connected to the same i/O pin.
Image resolution is too low to see details, but I think I see several dry-joints of the pin headers.
Thanks Wawa
I had not realised that the +5V terminal was not an output
However I have a dual 12V/5V DC power supply so I have now connected the relays to the 5V supply
The image I sent was with the "fried" Nano but when I receive the replacement I will take great care over the header connections