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miniature 3 pin sockets

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Speedy Builder527/03/2019 19:37:32
1776 forum posts
126 photos

I am a bit new to all this electronic ey stuff. I need to plug 5 off, 3 wire temperature sensors into a circuit board. Won't do it too often, but must be easily unplugged. Sensors draw little current at 3.3 volts.

I don't want them too big, perhaps 3.5 phono ?? Or what would you suggest ? Elsewhere to get them with a reasonable delivery schedule (Not China).

BobH

Frances IoM27/03/2019 20:15:39
613 forum posts
22 photos
15pin header (pins at 0.1" spacing - you can buy small blocks in various sizes inc 3 wire that take wires held by a screw terminal with female socket for each wire that will plug onto the male terminal strip

try RS-components ? but mine were derived from USA built equipment tho I know Maplin used to do them
Neil Wyatt27/03/2019 20:35:49
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Moderator
16098 forum posts
675 photos
73 articles

Stereo jack plugs are reliable.

3-pin mini DIN plugs are bigger but look more professional.

Ian P27/03/2019 21:22:24
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2095 forum posts
89 photos

If as you say these are plugging into a circuit board then is the board is already fitted with a connector?

If its is then

If say the board will have wires soldered to it that are then wired to connectors of your choice its just a matter of selecting parts that meet the electrical requirements, that can be panel? mounted, are wire-able with your skills and equipment, affordable and suit the type of wire fitted to the sensor. 3.5mm phono plugs are only two pole so no good for three wires sensors, 3.5mm stereo jacks would be OK but as one pole will be carrying supply volts you need to take care to wire them in such a manner that the sensor is not damaged whilst mating (the wrong contacts make connection as the plug is inserted).

There are hundreds of suitable connectors really, mostly its a matter of choosing the physical and mechnical features first.

Ian P

David George 127/03/2019 21:35:47
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815 forum posts
282 photos

Have a look at XLR connectors RS components or other supliers.

David

John Paton 127/03/2019 21:52:14
164 forum posts
6 photos

I recently bought 'Metal Screw Butt Joint Type Male Connector Aviation Plug XS8JK-4P/Y' from Amazon , £3.62 for a plug and socket. These sockets can also be bought 'panel mounting' rather than lead fitted. They have a nice snap on connection action so stay putt in use but disconnect easily when you need to unplug.

Also consider the servo plugs and sockets used by modelmakers for radio control, but these would need to be used with fly leads rather than panel mounted socket so wont look quite as professional. Get some lengths of small bore heat shrink tube to seal over soldered connections between flyleads and your wires if going that way.

Andrew Johnston27/03/2019 22:22:22
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4699 forum posts
532 photos

There isn't enough information in the OP to be able to make an informed suggestion. For instance are the connectors wire to PCB, or do the connector(s) need to be panel mount? Is each sensor to have it's own connection or can they all be on one connector. Do the connector(s) need to be latching or not?

Having spent many hours searching for connectors I can safely say that connectors is the biggest section in the catalogue; and still no-one makes the connector that you really want. sad

Andrew

Stuart Smith 527/03/2019 23:39:42
29 forum posts
6 photos

It sounds like Mini Din connectors would be a good choice if they are small enough for your application. Available from 3 pins upwards and with chassis or pcb mounting sockets. I buy connectors from CPC. They are local to me but do quick free delivery. **LINK**

duncan webster28/03/2019 00:48:37
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2111 forum posts
27 photos

why not just headers and female header jumpers

aIAAOSwbbdbBx-b">header pins

jumpers

you need a solder join in the wires, bit of heatshrink over it is fine. Arrange to have your 3 pins next to each other on 0.1" spacing, the the set of three get a better grip if they are adjacent. Really cheap

Geoff Theasby28/03/2019 06:58:29
580 forum posts
14 photos

Basically, you need Molex connectors. If a panel plug/socket, do not use stereo jacks, as has been said, because the wrong contacts 'make' as they are connected. Microphone connectors, available in many 'ways' can be used, but not if there is danger of harmful, inappropriate connectors being mated, causing hazards.

Brian G28/03/2019 08:17:37
487 forum posts
9 photos

If you want to connect straight onto a board but want something keyed, JST connectors are useful from Amazon (and plenty of other places).

Brian

Barrie Lever28/03/2019 08:43:05
249 forum posts
38 photos
Posted by Speedy Builder5 on 27/03/2019 19:37:32:

I am a bit new to all this electronic ey stuff. I need to plug 5 off, 3 wire temperature sensors into a circuit board. Won't do it too often, but must be easily unplugged. Sensors draw little current at 3.3 volts.

I don't want them too big, perhaps 3.5 phono ?? Or what would you suggest ? Elsewhere to get them with a reasonable delivery schedule (Not China).

BobH

Bob

Take a look at RC servo extension leads, they are as cheap as chips, they come with 3 colour ribbon leads attached, the connectors are polarised and they are reliable and you could have them on your doorstep in the morning.

You could fit the socket part of the lead into the case wall if it exists or if the project is not enclosed then just have a flying lead to the socket.

https://www.ebay.co.uk/itm/5-x-PAIR-300mm-JR-Servo-Extension-Cord-Cable-Wire-Lead-for-RC-Car-Helicopter/272599315111?epid=696065421&hash=item3f782f72a7:g:sOoAAOSwVkNameM~

Regards

Barrie

Ian P28/03/2019 09:42:46
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2095 forum posts
89 photos

I have 'here we go again' feeling!

A few days ago I brought up the subject of topics rambling on with irrelevant replies to the original question, I was and still am not, opposed to topic drift and admit that I do both partake and learn from some threads. In this particular thread the OP admitted he was not electronically knowledgeable but asked for some connector suggestions. Since there are thousands different connectors, without the OP supplying more information it is really quite pointless forum members suggesting particular devices ad infinitum.

Its not difficult to look at the beginning of a thread before posting a reply, I'm just baffled why a lot of people do not seem to bother.

An exaggeration really, but for all we know the OPs application might be part of diagnostic medical equipment and have an unlimited budget, or it might be a non critical hobby related project. Offering any specific connector without knowing its intended purpose does not really have any point.

Ian P

Andrew Johnston28/03/2019 10:04:08
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4699 forum posts
532 photos
Posted by Ian P on 28/03/2019 09:42:46:

..........without the OP supplying more information it is really quite pointless forum members suggesting particular devices ad infinitum.

Which is why I didn't suggest one. smile

Andrew

Ian P28/03/2019 10:24:23
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2095 forum posts
89 photos

I know you didn't Andrew.

Ian P

Brian G28/03/2019 10:40:26
487 forum posts
9 photos

The OP's earlier question about adding three temperature probes to an Austin Seven led me to believe that this thread about attaching three temperature probes to a circuit board might be for the same purpose, hence my belief that JST connectors would be appropriate. I stand admonished.

Brian

Frances IoM28/03/2019 10:46:22
613 forum posts
22 photos
actually he gave quite a bit of info
low voltage/current, easy but infrequent removal
onto a circuit board ie not a cased bit of equipment thus small self holding connectors that will not see many insertions


ok after this one can jump to a few assumptions - inexperience suggests that he might not have equipment for very fine soldering - hence my suggest of screwed terminal + the 0.1" strip that matches headerpins on several microprocessor boards

As many have said - there is no compulsion to either read or respond to all posts nor is this forum/message board a formal archive though if people place their photos along with their posts it will last longer as a useful mine of info than most others where the photos have dissapeared but the text has survived.
Barrie Lever28/03/2019 11:15:05
249 forum posts
38 photos

An exaggeration really, but for all we know the OPs application might be part of diagnostic medical equipment and have an unlimited budget, or it might be a non critical hobby related project. Offering any specific connector without knowing its intended purpose does not really have any point.

Ian P

Ian

If the OP had an unlimited budget then he would not be posting on a model engineer forum for an answer - simple, the big connector companies would be more than happy to furnish him with something very nice if he was involved in a medical project. HE IS NOT!!

The opening poster is using three sensors to measure temp. of the cylinder head, fuel and carb on an Austin 7, we know now that the sensors are not type K.

So all of the suggestions so far will work, although I favour JST type RC style connectors due to their reliability and low price.

Piece it together and you will get there, but the World will have moved on by then.

Regards

Barrie

Speedy Builder528/03/2019 11:19:16
1776 forum posts
126 photos

OK Guys and ladies, I have the information now - Thanks for all your help.

BobH - Speedy Builder 5

3404628/03/2019 11:34:12
481 forum posts
3 photos
Posted by Ian P on 28/03/2019 09:42:46:

I have 'here we go again' feeling!

A few days ago I brought up the subject of topics rambling on with irrelevant replies to the original question, I was and still am not, opposed to topic drift and admit that I do both partake and learn from some threads.

Ian P

Somethings will never change Ian P.

I now just accept it and move on.

Bill

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