UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > General Vintage Technology Discussions

Notices

General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc.

Closed Thread
 
Thread Tools
Old 1st Jun 2020, 10:46 am   #1
toshiba tony
Heptode
 
toshiba tony's Avatar
 
Join Date: May 2006
Location: Accrington, Lancashire, UK.
Posts: 697
Default Cigar lighter socket polarity?

Really simple one, please forgive me. Don't have a car to hand, thanks to peoples help on here on my problem, I have bought an FM transmitter to permit me to send my laptop audio to my stereo. Is the centre pin positive, wouldn't think I was an engineer for Sony and LG would you. This dementia really screws you up, ta.
toshiba tony is offline  
Old 1st Jun 2020, 11:02 am   #2
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 16,343
Default Re: Cigar lighter socket polarity?

All modern cars are negative earth, so the centre connection will be positive.
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is online now  
Old 1st Jun 2020, 3:07 pm   #3
Brigham
Heptode
 
Join Date: Mar 2006
Location: Co. Durham, UK.
Posts: 917
Default Re: Cigar lighter socket polarity?

The centre pin is live, the case is earth.
If in doubt, check the battery terminals for polarity. The 'earth' terminal goes to the chassis and engine block. On most cars, this is the Negative terminal.
Brigham is offline  
Old 1st Jun 2020, 3:53 pm   #4
llama
Octode
 
llama's Avatar
 
Join Date: Jun 2006
Location: St Osyth, Nr Clacton, Essex, UK.
Posts: 1,237
Default Re: Cigar lighter socket polarity?

I've got exactly what you describe, plus a few extras. Yes, centre pin positive.
My version plugs into an in-line female cigar-lighter socket (off ebay) which in turn is wired to the 12 V wires of an HDD power plug (old style, not SATA) and the 4-pin power socket to that is wired to a USB-to-12v adaptor, also off ebay. This is all to give me the most flexibility in how I power stuff, and what stuff.
Graham
__________________
Half my stuff is junk - trouble is, I don't know which half!
llama is offline  
Old 2nd Jun 2020, 8:57 am   #5
Brigham
Heptode
 
Join Date: Mar 2006
Location: Co. Durham, UK.
Posts: 917
Default Re: Cigar lighter socket polarity?

Does anyone use these for lighting cigars?
Brigham is offline  
Old 2nd Jun 2020, 9:06 am   #6
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 16,343
Default Re: Cigar lighter socket polarity?

The OP's question has been answered, so it's time to close this thread.
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is online now  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 3:09 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.