2
\$\begingroup\$

I want to connect two PCBs with four wires: VCC, GND, 2x I2C. Which connector is best suited for this application? I was thinking about an USB connector (and wire), but I am not sure if that is the best possibility. Therefore I wanted to ask if there are better connector types than USB for this application? VCC is 5V.

\$\endgroup\$
  • 4
    \$\begingroup\$ Do not use USB connector for non-usb signals. It will confuse people. Any simple connector will do, unless you have some high currents. \$\endgroup\$ – Eugene Sh. Jan 27 '15 at 16:58
  • 1
    \$\begingroup\$ What do you expect from your connector: A huge number of mate/demate cycles? Low price? Mechanical stability? Low contact impedance? Small size? Ease of mate/demate? Pre-made cables available? Stackable? etc. \$\endgroup\$ – Wouter van Ooijen Jan 27 '15 at 17:04
  • 1
    \$\begingroup\$ A JST XH or PH connector should work for most cases. \$\endgroup\$ – Ignacio Vazquez-Abrams Jan 27 '15 at 17:05
  • 1
    \$\begingroup\$ I use MTA100 for I2C at work, which is 2.54 mm pitch like what Ignacio suggested. Really depends on what current you'll be pulling, what gauge wire you're using, etc. \$\endgroup\$ – I. Wolfe Jan 27 '15 at 17:05
  • 1
    \$\begingroup\$ @EugeneSh. makes an important point. If you use a USB connector, someone will eventually connect it to an actual USB hub (or other USB device)!! \$\endgroup\$ – bitsmack Jan 27 '15 at 17:11
3
\$\begingroup\$

Some I2C interfaces on the market (MCC iPort for instance) use AMP 4-1761206-1 connectors, for which pre-fabricated cables are readily available.

enter image description here

You could also go with RJ-11 if you're not worried about shielding (as long as no one connects your board to the PSTN...)

\$\endgroup\$
3
\$\begingroup\$

enter image description here

I use this type of flat cables. They are reliable to use.

\$\endgroup\$
  • \$\begingroup\$ Looks like a fun project, Orkun :) \$\endgroup\$ – bitsmack Jan 27 '15 at 17:12
  • \$\begingroup\$ More fun than it looks! \$\endgroup\$ – Orkun Jan 27 '15 at 17:23
1
\$\begingroup\$

My go-to solution for something like this is just female headers on the board, ribbon cable with male headers soldered on for the cable. I will often use an extra pin clipped off with the hole in the female header plugged with a piece of wire. This keeps me from plugging it in backward.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.