RoboWanabe
Member
Hi,
I seem to always struggle when it comes to thinking about how to power my Applications. It's easy prototyping each individual component with a bench power supply, but as soon as I need them all in one circuit everything gets harder for me. Any tuorials or reading matriel to master this dark art would be appricated .
I need help with this specific example:
I want to use this device :https://octopart.com/wise-4012e-ae-wa-advantech-67312669
Runs at 1.5w@5vdc and consumes 300mA.
I want to power this sensor separately but output attached to device above : **broken link removed**
Runs at 12 - 24vdc and consumes 30mA - 0.36watts
I require that these devices must run for over 5 days on a battery pack.
I have found this battery : https://www.powerstream.com/PST-MP3500-I.htm
it has a value of 60wH and is about £140
or this battery : https://www.ebay.co.uk/itm/External...attery-Charger-For-Mobile-Phone-/291613962290
It has a value of 50000maH and costs £11.49
SO! for the two battery packs about my calculations are:
for 60wH : 60wH/(1.5w+0.36w) = 60wH/1.86w = 32hours = 1 dat 3 hours
for 50000maH: 50000mAH/(330mA) = 151 hours = 6 days
Are my calculations above correct and why does the significantly cheaper option last longer?
I seem to always struggle when it comes to thinking about how to power my Applications. It's easy prototyping each individual component with a bench power supply, but as soon as I need them all in one circuit everything gets harder for me. Any tuorials or reading matriel to master this dark art would be appricated .
I need help with this specific example:
I want to use this device :https://octopart.com/wise-4012e-ae-wa-advantech-67312669
Runs at 1.5w@5vdc and consumes 300mA.
I want to power this sensor separately but output attached to device above : **broken link removed**
Runs at 12 - 24vdc and consumes 30mA - 0.36watts
I require that these devices must run for over 5 days on a battery pack.
I have found this battery : https://www.powerstream.com/PST-MP3500-I.htm
it has a value of 60wH and is about £140
or this battery : https://www.ebay.co.uk/itm/External...attery-Charger-For-Mobile-Phone-/291613962290
It has a value of 50000maH and costs £11.49
SO! for the two battery packs about my calculations are:
for 60wH : 60wH/(1.5w+0.36w) = 60wH/1.86w = 32hours = 1 dat 3 hours
for 50000maH: 50000mAH/(330mA) = 151 hours = 6 days
Are my calculations above correct and why does the significantly cheaper option last longer?