I have a pressure sensor which is working in the feet of a person which senses the pressure. I'm using nRF processor for sending just ON/OFF signal to the motors. The problem is I'm using a battery which it should last for one year, it can't be recharged nor replaced. My idea was to use a nano Amperage comparator which senses at certain threshold the signal, if it's above the limit, it wakes up the micrcontroller and sends back data to the motor.

The inside comparator of nRF costs 5uA which I think is too high for a 12 months device, also it depends on the how much the pressure sensor is used.

Please note that in the future I would need an nRF uC because of future features that need to be added.

My question is there any other ideas or alternatives to let the battery work for 1 year giving the above conditions. Hardware or Software solution would also be an option.

  • \$\begingroup\$ Have a look at "transdermal power supply" as used in some internal hearing aids. \$\endgroup\$ – Transistor May 4 at 18:48
  • \$\begingroup\$ What kind of battery are you using? \$\endgroup\$ – Aaron May 4 at 18:59
  • \$\begingroup\$ @Aaron watches battery \$\endgroup\$ – Ahmed Tolba May 4 at 19:01
  • \$\begingroup\$ @Transistor I only found a research paper, could you guide me with a link ? \$\endgroup\$ – Ahmed Tolba May 4 at 19:01
  • \$\begingroup\$ No, I'd be looking it up same as you. \$\endgroup\$ – Transistor May 4 at 19:05

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