I have built a teensy/hope device and at 2nd attempt I got it working - thanks to the guidance on the wiki.
Now I am keen to add a GPS module...
In order to manage the power demands I want to be able to switch the GPS and the Hope radio on and off as required. I've got a vague idea that I can probably do this with some kind of transistor between the GPS and 3v3, linked to a spare IO pin I can control from the teensy. Same for the radio module.
Am I right? Is there a better way? Has anyone done this already (and can I copy you?!!)
Thanks, Mark