Unknown mini 'phono' plug - Page 1
Forum section: electronics / projects

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: January 02, 2015, 02:17:02 am
content: I picked up a bag of 10 of these in a 'free' box at a garage sale.Has anyone any idea what they are intended for. The plug is about 5.5mm ID with a 2mm bifurcated pin, connected to screw terminations labelled + & -.The quality is quite reasonable, with 'lantern' type contacts inside the shell.

author: GabYoung92
author_rank: Regular Contributor
timestamp: January 02, 2015, 02:27:45 am
content: It's a DC power connector. Most likely 2.1mmScrew terminals are for connecting the wires. The + on the top connects through to the center pin.

author: sleemanj
author_rank: Super Contributor
timestamp: January 02, 2015, 02:49:25 am
content: 5.5/2.1 (most common size) barrel jack socket to screw terminal. Although I've never seen a bifurcated socket pin like that. Interesting.

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: January 02, 2015, 03:12:57 am
content: Thanks for the replies. Only Antipodeans awake at this hour !Of course it is a female inline power connector - I feel silly now.I have just wandered across to my workshop and pulled out the drawer marked 'DC power connectors' and mated the thing up.I blame the Fat Yak beer, and I was fixated on plugging the connector into a panel socket...All the best for this year.

author: MarkL
author_rank: Unknown
timestamp: January 02, 2015, 03:27:48 am
content: These connectors are apparently very popular with CCTV installations. Even Amazon carries them (male and female), search "cctv dc power".They're handy to have around along with the BNC to two-terminal version.

author: Alex30
author_rank: Regular Contributor
timestamp: January 02, 2015, 03:49:56 am
content: They are often used for LED strip lighting too. Quite useful, I've always liked screwed terminals.

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 02, 2015, 04:37:26 am
content: It's a very useful sort of item for attaching all sorts of stuff to repurposed wall warts. My favorite is turning PC case fans into very good mini desk fans.

author: pickle9000
author_rank: Super Contributor
timestamp: January 02, 2015, 04:41:00 am
content: Pretty common item when dealing with security cameras. They come in male and female.

author: pickle9000
author_rank: Super Contributor
timestamp: January 02, 2015, 04:44:50 am
content: ebay searchhttp://www.ebay.ca/sch/i.html?_from=R40|R40&_sacat=0&LH_BIN=1&_nkw=2.1mm+cctv&rt=nc&_pppn=r1&LH_FS=12.1mm cctv

author: Falcon69
author_rank: Super Contributor
timestamp: January 02, 2015, 05:53:15 am
content: That socket pin is split like that so it will work for both a 5.5 x 2.5 and also a 5.5 x 2.1.

author: Jeroen3
author_rank: Super Contributor
timestamp: January 02, 2015, 06:45:42 pm
content: They are really usefull. I've wired them up to those very cheap LM2596 DC-DC's to make any voltage from any adapter pack.

author: uknerd
author_rank: Contributor
timestamp: January 04, 2015, 05:24:38 am
content: Have 120 of them at work on our cctv systemSent from my iPhone using Tapatalk

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: January 04, 2015, 06:06:25 am
content: Thanks for all the info.I now have one permanently attached to my bench DMM for easy testing of 'Wallwart' voltages. The rest have gone into the drawer !I also realised that I didn't have a national flag on my header profile. Added.BT

author: all_repair
author_rank: Frequent Contributor
timestamp: January 04, 2015, 06:21:52 am
content: I screw those 2 pin plugs I got from DC power pack and make all kinds of conversion adapter.