Shimmer 3 - 6.2.3. Power

Copyright © Shimmer 2017
Realtime Technologies Ltd Shimmer User Manual
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52
Shimmer’s on-board regulator can provide 100mA continuous current and tolerates surges until a
thermal limit is reached. Expansion devices must be current limited or have independent regulation
running off the PV_REG expansion pin. Exceeding the 100mA limit of the regulator, whilst possible, is
not recommended without detailed analysis and qualification of both electrical and thermal design
margin.
Battery Life
The Shimmer3 design goal for use as a long-term motion capture device is 1-14 days of operating life
from a 450mAh cell, while acquiring multichannel data with periodic radio communication. Using the
standard Shimmer battery (a 3.7V 450mAh re-chargeable Lithium battery), device operating time
will depend on a number of factors such as whether or not the radio is enabled, which sensors are
enabled and what sampling frequency is used.
Sensors Enabled
Sync?
Sampling Rate
Average Battery Life (hh:mm)
Accel (wide range)
No
10.24 Hz
282:00
Accel (wide range)
No
1024 Hz
111:00
Accel (wide range)
Yes
1024 Hz
65:00
Accel (low noise)
No
1024 Hz
113:00
Accel (wide range)
Gyro
Mag (LSM303DLHC)
Battery, Ext A7, Ext A6, Int A15
No
256 Hz
69:00
Accel (wide range)
Mag (LSM303DLHC)
Battery, Ext A7, Ext A6, Int A12
No
1024 Hz
44:00
Accel (wide range)
Mag (LSM303DLHC)
Battery, Ext A7, Ext A6, Int A12
Yes
1024 Hz
39:00
ECG
No
256 Hz
170:00
GSR
PPG
No
256 Hz
175:00
Table 6-1 Shimmer3 Battery Life Estimation Table (SDLog)