Hi,
I need a circuit that will pro grammatically provide between 4V and 8V of output. I have a 10.5V power supply already. What I was thinking of doing was to float the ground of an arduino to 3.3V using a regulator, then build a simple PWM circuit to generate between 0-5V, which should be between 3.3V and 8.3V when compared to the original 10.5V ground.
Questions: Will this work? Can I use a simple voltage regulator and connect the arduino's ground to the positive side of the regulator? How much current should I expect to flow through the regulator (so I can select the right 3.3V regulator)? The arduino is sure to draw far less than 500ma, but can I get by with a 250ma regulator for this?
I need a circuit that will pro grammatically provide between 4V and 8V of output. I have a 10.5V power supply already. What I was thinking of doing was to float the ground of an arduino to 3.3V using a regulator, then build a simple PWM circuit to generate between 0-5V, which should be between 3.3V and 8.3V when compared to the original 10.5V ground.
Questions: Will this work? Can I use a simple voltage regulator and connect the arduino's ground to the positive side of the regulator? How much current should I expect to flow through the regulator (so I can select the right 3.3V regulator)? The arduino is sure to draw far less than 500ma, but can I get by with a 250ma regulator for this?