Your question is not very clear. Are you trying to prevent the Android from drawing power from an external battery? If so, using device mode is indeed a good solution, if your Android has support for it. If you don't want the IOIO to use the phone battery, power it externally.
On Thu, Jun 11, 2015 at 5:25 PM, Alexander Kirillov <[email protected]> wrote: > Paul, > thanks, but I am building a robot for short mobile missions - so 1 hr time > for the phone would actually be OK. On the other hand, since the robot is > moving outdoors, I can't connect a phone charger plugged into a wall > outlet. > > Alexander > > > On Thursday, June 11, 2015 at 5:40:59 PM UTC-4, Paul James wrote: >> >> Alexander, >> >> Have a look at whether you can cannibalize the charging unit for the >> phone. On our tablet / ioio system (driving up to 21 relays - not all on at >> the same time, but does run 5+ relays at one time / 12 sensors) we spliced >> into the charging cable so that: >> - phone charger still powers the phone directly, >> - splice provides power to the ioio. >> >> There is a potential risk with voltage / current draws competing between >> the two devices - but this has not caused a problem for us. >> >> We use inexpensive tablets that have poor battery performance - they go >> flat within an hour or so of no charge. I expect a phone would draw less >> current than a tablet, so I expect you would have a little less trouble >> than we had initially. >> >> Paul James >> >> >> >> Water ReNu LLC. www.waterReNu.com <http://www.waterrenu.com> >> >> Dallas >> >> Texas USA >> >> >> -------- Original Message -------- >> Subject: device mode >> From: Alexander Kirillov <[email protected]> >> Date: Thu, June 11, 2015 8:19 am >> To: [email protected] >> >> Dear IOIO users: >> sorry if this has been asked before - I am new to the group. >> >> What is the best way to connect IOIO to a cell phone so that it uses as >> little power as possible? If I turn the charging pot all the way to the >> left, the phone doesn't see the board, and at the level where the phone >> sees the board reliably, the current is still too high for my setup (it >> overheats the voltage regulators I use to provide 5 v to the board). >> >> Can I use IOIO in device mode with the phone? What is the cable I should >> use then? >> >> I would rather not use bluetooth. >> >> Thanks! >> >> Sasha Kirillov >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "ioio-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/ioio-users. >> For more options, visit https://groups.google.com/d/optout. >> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
