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by kyleisnot
Sat Jun 22, 2019 2:14 am
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

Conversion losses depend on the regulator (either included or supplied by you) It could be 30%, or it could be as low as 4% General advise is to allow 20% for conversion losses, meaning your 10000mAh battery with step-up regulator will provide around 8000mAh at 5v You've forgotten that powerbank Ah...
by kyleisnot
Sat Jun 22, 2019 12:35 am
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

A Pi0 is going to draw about 100mA (perhaps less, but work with that). It will be at 5v. So the required power (W) is 0.1A * 5v = 0.5W. To run for 120 hrs. (5 days), it will use 0.5W * 120h = 60Wh. Therefore, you need a battery with more than 60Wh available. Since batteries don't generally put out ...
by kyleisnot
Wed Jun 19, 2019 9:31 pm
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

On a Zero the 5 volt pin of the power input micro-USB socket is directly connected by PCB trace to the 5 volt pin of the data micro-USB socket. If you want to remove power to a dongle you need additional hardware. That's what I thought, and I was ready to accept that. I was confused by that thread ...
by kyleisnot
Wed Jun 19, 2019 9:30 pm
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

I am doing it this way because the trap is very fast, designed to break the animal's neck quickly and painlessly. Not everyone will want to assist you in building a lethal trap. Have you considered using a live trap so that you can avoid killing animals you don't want to kill? Not my choice, it's f...
by kyleisnot
Wed Jun 19, 2019 1:10 am
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

A Pi0 is going to draw about 100mA (perhaps less, but work with that). It will be at 5v. So the required power (W) is 0.1A * 5v = 0.5W. To run for 120 hrs. (5 days), it will use 0.5W * 120h = 60Wh. Therefore, you need a battery with more than 60Wh available. Since batteries don't generally put out ...
by kyleisnot
Tue Jun 18, 2019 11:07 pm
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Re: Battery for Pi Zero with 3G

A Pi0 is going to draw about 100mA (perhaps less, but work with that). It will be at 5v. So the required power (W) is 0.1A * 5v = 0.5W. To run for 120 hrs. (5 days), it will use 0.5W * 120h = 60Wh. Therefore, you need a battery with more than 60Wh available. Since batteries don't generally put out ...
by kyleisnot
Sun Jun 16, 2019 1:24 am
Forum: General discussion
Topic: Battery for Pi Zero with 3G
Replies: 20
Views: 997

Battery for Pi Zero with 3G

Can anyone recommend a battery for a pi zero, that will be left on for days on end, but won't be doing much. It needs to wait for input via accelerometer and after the input is received, send a signal via a 3G dongle. Ideally it would last up to 5 days but any amount of time >2 Days is probably ok. ...

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