OSEPP FTDI Breakout Board (Arduino Compatible)

I use it for both 5V and 3.3V Arduino Pro Mini boards. It has a jumper to select voltage supplied to the board which works, unlike some other boards. 3.33V and 5.12V on mine, under load. It has a female header for connecting to the device or cable which has little tabs sticking out. It looks like a male connector, but I just folded these tabs back out of the way.

Prduct is complete with header pins and jumper. The unit I received does vary from what I thought the image was though, mine has male pins presoldered to the board instead of female. That works better for programming an Arduino Pro Mini without pins though, so no complaints.

It works very good, I just wish it had some mounting holes.

This item took care of a lot things for me. The osepp allows me to program and reprogram arduino microcontrollers chips with very little major rewiring of external circuits.