3 replies to this topic

[philvr]

The Netduino Plus is plugged into an expansion pcb. Vin is provided from an 8.6V regulator via PIN 6 of J6 (the power connector pins). The system boots up and runs some test code when I power on - it simply flashes a bi-colour led via two DIO pins. The 3.3V pin provides power to a SP720 chip used to prevent over voltage on several i/ps. Please can anyone advice if the Netduino is designed to have power attached via J6 AND possibly via USB connection? Looking at the schematic for the Plus MK1 it looks like Q5 should switch the power source between either USB or Vin (via Vprotected)/ Ive been hacking about for some time with the board so I'm wondering if I've blown something. I just need someone to talk this over with so any advice welcome, thanks. Philvr

[Chris Walker]

Hi Philvr, Netduino will automatically switch between VIN (the header or the power barrel input) and USB power. When you provide 7.5V-9.0V power to VIN, the board will automatically switch over from USB power. Because of this, plugging in power to both VIN (7.5V-9.0V) and USB (4.5V-5.5V) will not damage your board. We wanted to make sure you were protected, so we included those extra power-source-switching parts. If you plug in the board purely via USB, does the app run? What happens if you start via USB power and then add power via VIN? Chris

[philvr]

Hi Chris. Thanks for your time. If I plug in only via USB the board is fine, if I then add power via Vin the board is still OK. Your answer is excellent news and means my App should be AOK... Regards Philvr

[philvr]

Just a follow up to state that now I have no issues when deploying onto the Netduino Plus MK2 (with the latest production firmware). The software builds and deploys almost immediately every time.