I am on a project. It was stated that i use MC78L08CP voltage regulator. Can I use my l7808cv (output rating of 8v 1.5A )as a replacement?
You can use the 7808 regulator, but the output of the regulator would have to go to the VIN terminal on the Arduino. Alternatively, you could connect it to the middle pin of the barrel jack, which is also the VIN terminal.
The Arduino will take whatever voltage comes in on the VIN terminal and regulate it down to the 5V needed by the rest of the circuitry.
The current the regulator can provide will depend on a number of factors. You rarely get the full rated current. As long as the current the regulator can provide is at least as high as the amount of current drawn by your circuit, then things will work just fine.
If you have the parts available, a better approach would be to use a 7805 (5V@1A) regulator. The 5V output of the 7805 can be connected to the 5V terminal of the Arduino and any extra current the regulator can provide will be available to other circuits connected to the Arduino.
There is a diode in the center jack circuit.
If this is an Arduino UNO, unplug the USB cable when doing this.
Thank you for your quick response. I am really greateful.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.