I plan to use Power Bank ( 30000 mAh) to operate my Arduino UNO with sensors and other components . The calculated current consumed will be 200 mAh approximately for the whole system . Can I use the power bank for this purpose ? Is there any reservations on that ?
According to my initial vision to the matter , I think the system should work for 30000/200 = 150 h = approximately 6 days before the need for recharging the power bank .
That’s fine - you could look at techniques to reduce your power further - such as putting the Arduino to sleep, taking off the power led, turning any sensors off between measurements.
Maybe even build a standalone “ minimal Arduino” with just the processor so you don’t waste power on bits you don’t need.
Google all this stuff - you could get your battery to last for a year !
One frequent issues with powerbank use.
They tend to power down if they detect low current draw.
Put a phone on it to charge the battery, and they stay powered up the entire time the phone is charging.
But when the phone gets done charging, the current draw goes down. The powerbank detects this and shuts off.
hammy:
That’s fine - you could look at techniques to reduce your power further - such as putting the Arduino to sleep, taking off the power led, turning any sensors off between measurements.
Maybe even build a standalone “ minimal Arduino” with just the processor so you don’t waste power on bits you don’t need.
Google all this stuff - you could get your battery to last for a year !
vinceherman:
One frequent issues with powerbank use.
They tend to power down if they detect low current draw.
Put a phone on it to charge the battery, and they stay powered up the entire time the phone is charging.
But when the phone gets done charging, the current draw goes down. The powerbank detects this and shuts off.
I appreciate your comment !
In my Case , the whole system ( arduino UNO + Sensors + other components ) will keep drawing the same amount of current ( 200 mAh) through the their working and measuring, So the drawn current will not be reduced as in phone case . Or Do you mean if I resorted to battery saving techniques ( As Mr.hammy said ) the power bank will detect low current draw and it will shut off ?
What About solar power bank ? Same issue with it ?
Check how Your power bank behaves. Don't lower the power consumtion that much that the pb cuts off. Be a little bit above that limit. Then You have done the best You can I think.
F_O_S:
I think the system should work for 30000/200 = 150 h = approximately 6 days before the need for recharging the power bank .
The manufacturer of the powerbank has probably put the capacity of the battery on the case.
Boosting battery voltage (~3.7volt) to 5volt, and running the boost converter reduces that Ah rating.
Practically, you will get about 60% if that calculated time.
Leo..