Low power techniques

RichardO

Joined May 4, 2013
2,270
Thank you for the insight about setting the driving pins to match the signal pins from the sensor. I wouldn't have thought to do that. I'm assuming it's to help reduce power consumption and to prevent any damage to the devices?
Correct.
One subtle cause of current drain is when one (or more) output pins end up powering a sensor or other device through an input-pin protection diode.
 
There are many things that need to be taken care of when building a system that consumes very little power.
10 considerations are important:
1. Operating voltage of the circuitry
2. Operating voltage of power-hungry devices
3. Selection of components/chips ( ADC, DAC, Relays, etc.)
4. Other Interface Modules
5. Power gating the peripherals (ON/OFF control)
6. Power Supply
7. LED
8. Display
9. Pull-ups
10. Microcontroller (Software Control)
 
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