The Linux Robot - Progress, Software & a Video
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| The camera draws over 350mA@12V and there’s no reason why I
| need it permenantly on. I’ve connected one of the Phidget
| Kit’s outputs to a simple transistor/resistor/LED circuit,
| with a 12V supply passing into the transistor’s collector
| pin, through the transistor, relay input and resistor. Then
| I’ve connected the camera’s power over the relay’s output.
| The power on and off for the camera/LED are now through
| setting the board’s digital output 0 to 1 and 0
| respectively. Power consumption with no movement has now
| dropped from 1.25A to just under 0.90A. I’ve also put all
| essential USB hardware on one usb hub and all optional
| hardware on another (USB to TTL adapters, sound adapter) on
| the other. The optional hub is also on a relay now on the
| opposite side of the robot, and this now reduces idle power
| consumption from 0.90A to about 0.50A which I’m happy with.
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http://www.adamsinfo.com/the-linux-robot-progress-software-a-video/
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