Pennock's Fiero Forum
  Technical Discussion & Questions
  Connecting a Tablet to the same circuit as the Radio

Post New Topic  Post A Reply
Email This Page to Someone! | Printable Version


next newest topic | next oldest topic
Connecting a Tablet to the same circuit as the Radio by Gohabs93
Started on: 08-10-2013 10:06 PM
Replies: 6 (133 views)
Last post by: Gohabs93 on 08-10-2013 11:26 PM
Gohabs93
Member
Posts: 86
From: Montreal,Quebec,Canada
Registered: Jul 2006


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-10-2013 10:06 PM Click Here to See the Profile for Gohabs93Click Here to Email Gohabs93Send a Private Message to Gohabs93Edit/Delete MessageReply w/QuoteDirect Link to This Post
I'm thinking about removing the AUX gauges and put a nexus 7 tablet instead. I don't want to use the cigarette lighter, so I'm thinking about getting a 12V to 5V usb and connect it to the 12V that is going to my Kenwood cd player (aftermarket). The tablet uses 2.1A, and the radio fuse is only 10A, is it a good idea. Will I cause the fuse to blow many times?

My second choise is to get this Littelfuse FHA200BP ATO Add-A-Circuit Kit (http://www.amazon.com/gp/product/B0002BGELQ/102-4194502-6027300?v=glance&n=15684181&tag=5336118840-20) and put it on the 20A BAT fuse then I will put the tablet on that newly created circuit. I believe this is the better option, what do you guys think?

Thanks!
IP: Logged
PFF
System Bot
IMSA GT
Member
Posts: 8680
From: Nazifornia
Registered: Aug 2007


Feedback score: (5)
Leave feedback





Total ratings: 241
Rate this member

Report this Post08-10-2013 10:26 PM Click Here to See the Profile for IMSA GTClick Here to Email IMSA GTSend a Private Message to IMSA GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
If your radio actually used all of that 10 amps, I'd be amazed. The same with the tablet. 2 amps for a tablet must be what they rate with a dead tablet battery trying to be charged and in use at the same time. I don't think you will have any issue tapping into the radio fuse.

Edit to add......use a fuse tap and try it. The worst that can happen is that the fuse blows and you can go with option 2.

[This message has been edited by IMSA GT (edited 08-10-2013).]

IP: Logged
Gohabs93
Member
Posts: 86
From: Montreal,Quebec,Canada
Registered: Jul 2006


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-10-2013 10:38 PM Click Here to See the Profile for Gohabs93Click Here to Email Gohabs93Send a Private Message to Gohabs93Edit/Delete MessageReply w/QuoteDirect Link to This Post
When you're using navigation and playing movie at the same time (with the screen on), it uses around 2A. I just checked my cd player manual instructions and it says that it draws 10A. I could test connecting both radio and and tablet and see if the use gets blown :P.
IP: Logged
IMSA GT
Member
Posts: 8680
From: Nazifornia
Registered: Aug 2007


Feedback score: (5)
Leave feedback





Total ratings: 241
Rate this member

Report this Post08-10-2013 10:45 PM Click Here to See the Profile for IMSA GTClick Here to Email IMSA GTSend a Private Message to IMSA GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Gohabs93:

When you're using navigation and playing movie at the same time (with the screen on), it uses around 2A. I just checked my cd player manual instructions and it says that it draws 10A. I could test connecting both radio and and tablet and see if the use gets blown :P.


Thats amazing about the CD player. I can't believe it pulls that much.

IP: Logged
GM Shane
Member
Posts: 175
From: Traverse City, MI
Registered: Aug 2005


Feedback score: (2)
Leave feedback

Rate this member

Report this Post08-10-2013 11:06 PM Click Here to See the Profile for GM ShaneClick Here to Email GM ShaneSend a Private Message to GM ShaneEdit/Delete MessageReply w/QuoteDirect Link to This Post
Note that the tablet draws 2.1a at 5V, or 10.5W. 10.5W at 12V is 0.875a. If you use alternator voltage of 13.5 VDC, you're using 0.777a.

Let's assume that the cigarette lighter to USB adapter is 20% inefficient, which I think is fairly conservative. At 12V you're using 1.05a, and at 13.5V you're using 0.932a.

In other words, as long as the radio doesn't use more than 9 amps you'll be fine.
IP: Logged
85 SE VIN 9
Member
Posts: 690
From: Harwood Heights, IL, USA
Registered: Apr 2010


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-10-2013 11:15 PM Click Here to See the Profile for 85 SE VIN 9Click Here to Email 85 SE VIN 9Send a Private Message to 85 SE VIN 9Edit/Delete MessageReply w/QuoteDirect Link to This Post
You can add accessories to the radio (or the Batt) circuits at the fuse box. Those holes that look like half a fuse are female blade terminals. Just plug a male blade in. If you use the radio one it will be like the radio, on the accessories circuit. If you use the batt terminal it will always have power.
IP: Logged
Gohabs93
Member
Posts: 86
From: Montreal,Quebec,Canada
Registered: Jul 2006


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-10-2013 11:26 PM Click Here to See the Profile for Gohabs93Click Here to Email Gohabs93Send a Private Message to Gohabs93Edit/Delete MessageReply w/QuoteDirect Link to This Post
I'll use the female terminals of the Bat then. It's safer if I want to plug a tablet and a phone (for tethering).

Thanks for the help!
IP: Logged

next newest topic | next oldest topic

All times are ET (US)

Post New Topic  Post A Reply
Hop to:

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery | Ogre's Cave
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock