All Questions
6 questions
2
votes
0
answers
108
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How to Prevent Current Drain from an Android Phone's USB Connector? [closed]
Noob alert - I'm very much a hobbyist not a professional so doubtless fall into the 'little knowledge is a dangerous thing' category.
So... I have a project which requires simultaneous charging of ...
-3
votes
1
answer
345
views
What amperage Android sends to jack 3.5?
I want to use signal of Android's jack 3.5 as key for my circuit.
For this reason I want to know amperage and voltage which Android can send to this port
0
votes
1
answer
64
views
Can I use a separate power supply to charge the phone while working with a IOIO board?
The current I get from the IOIO to charge the phone (500mA) is too low for my application (I need it to run for a long time, and the battery drains).
I was thinking of taking apart the cable (the red ...
- 11
0
votes
1
answer
62
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Safety considerations in Android Wear products using high resistance electrodes
I am wondering how wristlet devices can safely measure a person's heartbeat without risk of electric shock. It seems everywhere I read, the threat of static discharge would be far greater with an ...
- 83
0
votes
1
answer
175
views
Working on a high current USB charger
Title says it: I'm working on building a high current USB charger for my devices so that I can integrate USB ports into my headboard. However, I'm having a few glitches.
When I plug in a device, the ...
- 215
1
vote
2
answers
148
views
Switch between the current source with the highest amperage
I have two current source. Both are about 5 volts. I want to charge my phone with the highest current source out of the two, so if the highest current source (2.1 amps) is gone, it will switch to the ...
- 13