Ron Feliciano

Power Estimation Solutions

1. 2 Input / 1 Output Logic eBlock.

Assumption: For every 1 Tx, there is 2 Rx (2 input, 1 output). All other current draws are
considered negligible.

Energy required for RX.

Amount of cycles and leakage current were made up. ( With Eric)

Rx =  PIC current + leakage current

.000020 A + .000001A = .000021A

Energy to RX

5 V * .000021 A * .864 sec/day = .00009072


Joules in battery / Powerdown draw+ 2* RX + 1TX

19,278 / (( 2* .00009072) + 2.678J + .0368J) = 7100.6010 days.
 

2. LED eBlock (non-blinking)

86,400 sec per day * 30% = 25,920 sec LED is on per day

Energy used in a day:

2.1V * .020A * 25920 = 1088.64 J/day

Current in Batt/ ( Energy used by (LED + RX + PIC downtime)

19,278 / (1088.64 + .00009072 + 2.678) = 17.6648 days

LED blinking

Assume 30% usage per day still stands.

86,400 / 2s = 43,200 Blinks/day

43,200 * .5 = 21,600 sec/day LED is on possible

21,600 * 30% - 6480 sec/day that it is on

2.1v * .020A * .6480 = 272.16 J/day

19,278 / ( 272.216 + .0368 + .00009072) = 70.8091655 days