I have a bunch of LCD 1602 and i2c modules. Both have male headers.
Do female-to-female headers exist so I can hookup a series of 2 male header pins? I searched but I guess my search terms are not right.
This is for a school lab.
Thank you
look for gender changer.
It is really very easy to make your own if you have the parts on hand and a reasonable crimping tool.
Thanks, but after searching on Google, I only see female to male changer. I need the opposite. I have 2 male headers that I want to connect together.
What kind of parts are we talking about?
These are only housings, but can I put 2 males on each side?
Not sure what you're asking, but it looks you want to stack boards.
Leo..
Some things to review:
Although you can use most small gauge wire, suggest you use high strand count with silicone insulation.
24AWG is a good compromise.
https://www.amazon.com/BNTECHGO-Silicone-Wire-Spool-Color/dp/B09X479GT3?th=1
Example
Inexpensive Male and/or female pins.
Dupont shrouds come in many sizes.
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I want to stack the i2c lcd module and lcd 1602 together. Both have male headers soldered.
Sorry, I was not clear. Currently, I'm using a mini breadboard. I could have used a ribbon cable. But what I want is a gender changer to stack the devices together one on top each other.
You could fab your own by soldering two of these back to back.
I'd use double row connectors and solder both rows for the structural stability.
That's a good idea. Now time to politely ask the school technician to build 30 gender-changer. 
Have him teach you. It's a good starter project.
If you decide to go that route, I suggest you use the surface mount version for easier soldering.
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