Picoblade 1.25 pins

Help
1

Hi, I’ve bought a neo-m8n gps for my apm2.8 board. The problem I have is that it came with a 6 pin connection, but obviously I need a 5 and a 4. I’ve bought the 5 and 4 pin molex picoblade connectors from rs-online http://uk.rs-online.com/web/p/pcb-connector-housings/4476580/?searchTerm=4476580&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B367D247C5E5C647B377D247C5E5C647B31307D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D34343736353830267374613D3434373635383026 but the pins on the cable don’t fit these, they are too long. Does anybody know which pins are correct for these?

Thanks,
Richard

2

Hi Richard
I should be able to answer this tonight when back home.
Unless somebody else does first, which would be even better :grin:
Cheers
Steve :slight_smile:

3

I believe many of the ublox GPS use molex 1.25mm pins which are the same size but the crimp connectors are slightly different. Did you buy your GPS module from us? If so we might have a bunch of spare connectors so could get one sent to you.

4

Hi Richard

I believe the terminal is a MOLEX part no. 50079-8100
see datasheet, link below

http://www.molex.com/molex/products/datasheet.jsp?part=active/0500798100_CRIMP_TERMINALS.xml

In the UK, Farnell and RS Components stock them

http://uk.farnell.com/molex/50079-8100/contact-crimp-receptacle-28-26awg/dp/2135940?ost=50079-8100&selectedCategoryId=&categoryNameResp=All%2BCategories&searchView=table&iscrfnonsku=false

For the US Digi-Key have them

http://www.digikey.co.uk/product-search/en?keywords=50079-8100

Hope this helps
Steve :slight_smile:

5

Steve, thank you for that info. Wish I’d of seen your first message so I could say I’d managed to work it out. After seeing the price of the crimp I decided it’d be daft to use them.
I found that farnell sells pre-crimped cables which I’ve bought and arrived yesterday. Hence my next problem.
They won’t clip into the connector properly. It’s like the little bit of metal that’s supposed to hold it in is way too small. I’ve unclipped pins from other connectors to compare and they look the same, just ever so slightly different (cut outs on the side and smaller metal stopper)

Alex, unfortunately not. I wish I had. I didn’t know you existed until Tuesday when I placed a few orders with you.

I’ve got it working at the minute, connector put into the board, then the cable into the connector so it’s on the pins. It’s working but the cables are easily pulled out so can’t test fly just yet.

6

I can still send you a couple if you are happy to pay £1 for postage (that is assuming I can find the ones we have lying around somewhere) just contact us via our website and myself or Sam will have a look around to see if we have any spare. Worst case we can get some with our next batch of GPS modules.

7

Hi
I know what you mean about locking in place, they are a bit fiddly usually pressing down on the little finger after the terminal has been inserted fully will lock them in place.

I don’t really understand why the manufacturers of FC’s now use these tiny fiddly connectors. All about squeezing the most onto a 32x32mm board but hey guys! what about quality, reliability, safety. we put these things high in the sky !!! (it’s OK, off my soapbox now :grin: :grin:)

Back to leads, my method is cut the connectors off parts like GPS’s and splice the wires, after tailoring to best length, to the connector/wires that came with the FC. 1.2mm 2:1 heatshrink sleeve makes it all look nice and neat.

Hope you get it sorted
Steve :slight_smile:

8

Thanks, that’s appreciated. I’ll send a message shortly.

I think I’ve worked out the problem after looking at the data sheets. The cables I bought http://uk.farnell.com/molex/92001-1198/cable-assmbly-socket-free-28awg/dp/1836002
Use 501334 series picoblade apparently. http://uk.farnell.com/webapp/wcs/stores/servlet/Search?catalogId=15001&langId=44&storeId=10151&st=501334&pageSize=25&showResults=true&aa=true which looks slightly different to http://uk.farnell.com/molex/50079-8100/contact-crimp-receptacle-28-26awg/dp/2135940 that I need.

9

Yeah that was my initial plan but thought I’d make it neater by just changing the full cable with 6 cables then heatshrink them together. Didn’t exactly work :slight_smile:
I’ll get there in the end.