Search found 3 matches

by williams01933
Wed Jun 12, 2019 9:35 am
Forum: General Discussion
Topic: Advice on power bank voltages/power
Replies: 7
Views: 5160

Re: Advice on power bank voltages/power

OK, so here is what I have learnt today 1 Do not use a breadboard to connect low voltage / high current components 2 'Jump' wires are really not good enough for this type of connections 3 Be careful where you measure your voltages Because of the above my measurements were way out. The extra resistan...
by williams01933
Wed Jun 12, 2019 2:04 am
Forum: General Discussion
Topic: Advice on power bank voltages/power
Replies: 7
Views: 5160

Re: Advice on power bank voltages/power

I would think it almost a certainty that any pack would have a current limiter for safety.
However, the slot is rated at 2100ma (with a second one rated at 1000ma).
5v into 7.5 ohm would only draw 666ma so any current limiter would (should) not kick in.
by williams01933
Tue Jun 11, 2019 2:59 pm
Forum: General Discussion
Topic: Advice on power bank voltages/power
Replies: 7
Views: 5160

Advice on power bank voltages/power

I decided to test just how much power my external power bank could actually supply over a period of time so set up a simple 7.5 Ohm load resistor across its supposedly 5v 2.1A ouput. It is rated at 5600mah and I did not want to stress the battery too much. The voltage immediately dropped to 3.77v an...