Sorry. Indeed, I was trying to prevent the Android from drawing power from an external battery. I will try to switch to device mode - all I need is to get an OTG cable and plug that into the phone, right? (My phone does support OTG, but only has the usual USB micro B plug, so I can't use the OTG cable that came with ioio board). On Saturday, June 13, 2015 at 6:41:42 PM UTC-4, Ytai wrote: > > 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] > <javascript:>> 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] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> 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.
