I completed a project with the Arduino Uno and every things seems to be correct. Now, I want to buy a shield and mount is on top of the Uno. Then I want to put the devices on the shield and soldering the the devices.
Now, here is the problem. I want to put the board inside the server case where the power connectors are Molex. See this page for its shape. However the board external power is a mounted 2.1mm center-positive plugable power jack
.
In other words, I want to put a molex header on the shield board (to be able to plug the server's power supply cable) and bypass the USB or the external built-in power jacks of the Uno.
How can I do that?
I want to put a molex header on the shield board (to be able to plug the server's power supply cable) and bypass the USB or the external built-in power jacks of the Uno.
How can I do that?
Feed the power from the Molex connector to the Uno pin marked Vin assuming that you are providing 6V to 12V
WOW.. is that so simple?
So, I can connect the 5 (or 6) Volt pin to Vin and connect two GNDs to the GND pin on the Uno. Thanks.
mahmoodn:
WOW.. is that so simple?
So, I can connect the 5 (or 6) Volt pin to Vin and connect two GNDs to the GND pin on the Uno. Thanks.
The voltage input needs to be above 6.2V (since the dropout voltage is 1.2V) and preferably between 9V and 12V. There is a built-in regulator that will supply the Arduino with exactly 5V.
Or just make a cable to go from the 12V of the molex to the DC jack...
Be aware if you use the onboard regulator (so in a server with 12V) you can't draw to much current. A few LED's is the max.
But you can also power the Arduino from 5V.
Option 1 (fool proof), make a molex to USB cable with the 5V connected
Option 2, power the Arduino via the 5V pin. DON'T connect it to USB when you do. If you want to use USB at the same time take a USB cable and cut the red 5V wire in it.