RE: Shifting voltage levels of the GPIO

2009-10-18T09:24:51+01:00

You may want to try using an 7805 or LM317t. Or use the 5V from the USB ports of the RoBoard as power supply for your sensor.

Statistics: Posted by Marsman — Sun Oct 18, 2009 9:24 am

Shifting voltage levels of the GPIO

2009-10-16T00:14:58+01:00

I have managed to get the parallax Ping sonar working with the roboard (I can provide code if anyone is interested) and am using a simple voltage divider to take the GPIO line from the roboard from 6V to 5V.

I was wondering if there was any clamp circuit that would translate the GPIO values to 5V independently on the voltage powering the roboard. In my case if I change the power to say 9V, I need to change the resistors in the voltage dividers to get 9V down to 5V.

I did find some circuits with diodes, but they would take a fair amount of current once over the 5V level.

Thanks,
-Don

Statistics: Posted by dsaner — Fri Oct 16, 2009 12:14 am

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RE: Shifting voltage levels of the GPIO

Shifting voltage levels of the GPIO