Another what is this connector - Page 1
Forum section: electronics / beginners

author: Back2Volts
author_rank: Unknown
timestamp: October 17, 2017, 09:02:36 pm
content: I would like to tap into the 11 wires to peek at the signals and attempt to decode the protocol. The cable is the interconnect between the logic and power sides of a sprinkler controller. They seem to a variation of IDC with .1" spacing and a couple of key ribs on one side.Any one familiar with manufacturer/model ?

author: jpanhalt
author_rank: Super Contributor
timestamp: October 17, 2017, 10:19:02 pm
content: Why do YOU need the keys on the connector for doing your research?

author: Back2Volts
author_rank: Unknown
timestamp: October 17, 2017, 11:36:36 pm
content: A missing piece of information... I did not say that the final intention, if I succeed with the decoding, is to get in the way and read and feed signals at will from a Rpi.The wires carry for sure: power (24VAC+GND), 1-remote wire, and 2-rain sensor. Then I assume the five remaining may be one for Vcc and 4 for control of 15 zones plus pump. I am guessing the remote signal is a pulse train riding on one of the 24VAC lines. The control side may be based on shift registers...

author: Nusa
author_rank: Super Contributor
timestamp: October 18, 2017, 01:16:46 am
content: This looks like it might work:http://www.mouser.com/ds/2/276/0022012115_CRIMP_HOUSINGS-158107.pdfAnother option would be to cut that interconnect cable in the middle and install your own connectors of whatever flavor you have handy. Then you don't have to deal with the original connectors.

author: floobydust
author_rank: Super Contributor
timestamp: October 18, 2017, 03:25:54 am
content: The connector has the mfgr's initials on it.I think it's an AMP 2.54mm IDC connector, maybeMT-100MTA-100. Not sure about MODU series.You will die a slow death looking for it on the TE website though.Edit: forgot the p/n 'A'

author: Monkeh
author_rank: Super Contributor
timestamp: October 18, 2017, 05:54:26 am
content: It's an MTA-100 with polarizing tabs, feed-through, 24AWG. 4-644563-1.

author: Back2Volts
author_rank: Unknown
timestamp: October 19, 2017, 01:45:15 am
content: Thank you. The MTA-100 minimum orders at DigiKey and Mouser are 1000 pcs, so it is a no go for a hobby.I wonder if the one pointed by nusa would work. It is cheap and available. It may be worth a try after I figure out the protocol.

author: floobydust
author_rank: Super Contributor
timestamp: October 19, 2017, 01:56:15 am
content: This is an oddball 11 pin thing, rare. Could cut a 12 pinner.With these, I made a "tee" soldering a female+male+male connector together.You can solder two male headers (180 apart) to the (right angle) female's IDC crimp ends, messy but works as a tap, a three-way.Anything can work as a male header if the pins are about the same size.

author: Back2Volts
author_rank: Unknown
timestamp: October 19, 2017, 08:42:21 am
content: I have found this 11 pin. It can take discrete wires, which would be even better (no need to look for some odd ribbon). It is 22AWG but I don't think that would be a problem.https://www.digikey.com/product-detail/en/te-connectivity-amp-connectors/4-640620-1/A31059-ND/698315I have also found this 12 pinner, witch I would have to cut and find some ribbon cablehttp://www.mouser.com/ProductDetail/TE-Connectivity-AMP/4-644563-2/?qs=sGAEpiMZZMs%252bGHln7q6pm0dqVoAWDf1bOddntoO1VGU%3d

author: Nusa
author_rank: Super Contributor
timestamp: October 19, 2017, 09:02:55 am
content: You could also combine smaller MTA-100 connectors. For instance, an 8-pin and a 3-pin could be plugged in side by side to get 11 pins.

author: Monkeh
author_rank: Super Contributor
timestamp: October 19, 2017, 03:36:41 pm
content: Quote from: Back2Volts on October 19, 2017, 08:42:21 amThe connector you've got will take discrete wires, also. They're the same series and termination, you've just found the 22AWG variant without the tabs. I'm not 100% sure if the polarized and non-polarized versions will mate, but it's worth a try.

author: ebclr
author_rank: Super Contributor
timestamp: October 19, 2017, 03:42:11 pm
content: Check this onehttps://pt.aliexpress.com/item/100kit-lot-2-54mm-Punctured-connector-640440-12P-MTA-CST-100-II-SL-156-and-AMP/32380320444.html?spm=a2g03.search0204.3.2.78GYTo&ws_ab_test=searchweb0_0,searchweb201602_1_10152_10065_10151_10068_10344_10345_10342_10343_10340_10341_10540_10307_10060_10155_10154_10056_10055_10054_10539_10538_10537_10059_10536_10534_10533_100031_10099_10338_10103_10102_10052_10053_10142_10107_10050_10051_10173_10084_10083_10080_10082_10081_10110_10111_10112_10113_10114_10312_10313_10314_10078_10079_10073,searchweb201603_2,ppcSwitch_5_ppcChannel&btsid=c6e945bb-6b36-4c1e-b901-05c8f4f90204&algo_expid=cdb617d3-a0b3-441d-9715-384977f0b010-0&algo_pvid=cdb617d3-a0b3-441d-9715-384977f0b010

author: Monkeh
author_rank: Super Contributor
timestamp: October 19, 2017, 03:44:05 pm
content: Quote from: ebclr on October 19, 2017, 03:42:11 pm11 pin.Also, in usual Ali style, unclear how many you get - but it looks like 10, at almost twice the price of Digikey...

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 19, 2017, 05:06:50 pm
content: cut to 11 pins, and you have another 6 pins connector. you still have one polarization tab on each connector... or...http://www.ebay.com.my/itm/AMP-1-640440-8-Connector-Receptacle-18-Pos-22AWG-MTA100-Series-RED-NEW-Qty-1-/201970099394?hash=item2f065b24c2:g:jXYAAOSwjKFZVcRaif you are too lazy to cut...http://www.ebay.com.my/itm/QTY-20-1-640440-1-AMP-11-POSITION-MTA-100-CONNECTORS-22AWG-2-54mm-PITCH-/111464790915?hash=item19f3d1bb83:g:C9QAAOSwRLZUGB~r

author: ebclr
author_rank: Super Contributor
timestamp: October 19, 2017, 05:16:11 pm
content: Is 12 pins and 100 pcs, or price is a tenth of digikey, just read with attention, or count pins on picture

author: Monkeh
author_rank: Super Contributor
timestamp: October 19, 2017, 05:18:39 pm
content: Quote from: ebclr on October 19, 2017, 05:16:11 pmAnd the OP needs 11. Read with attention, and count pins on picture.QuoteBecause Ali listings are never contradictory, and they always ship what they claim. I read with attention: I found inconsistencies and pointed that out.Also, read with attention: If that is 100 pieces, and you correct the part number (more inconsistencies!), it's only one fifth the price. Or it's a thousand pieces and one thirty-sixth the price? It's so clear!

author: Back2Volts
author_rank: Unknown
timestamp: October 19, 2017, 06:46:33 pm
content: Thank you guys for the pointers to ebay and ali. It's funny that I did searched eBay and found nothing, but I was not looking for MTA...Next time I order stufff from Digikey, I will get a couple of the 11 pin. I will keep ebay in mind...Thank you to all of you guys !