Electronics-Salon I/O Extension Board Kit for Arduino MEGA DIY. [SOLDERING REQUIRED]

so today I'm going to show you how to solder an Arduino Pro Mini so some of these that I've ordered have come without the pins connected or soldered in which actually can be a good thing because if you're trying to fit these in a really small space you don't necessarily want the pins connected and then you can solder your wires directly on here but most of the time I do want my pins connected so I can switch them out so I figured out a technique that works fairly well for me that I thought I'd just share with you just in case you're like me when I was just getting started and unsure of how to do it so first what you want to do is if you have one just slide the pro mini pins into a breadboard and then set your pro mini on top of the pins so they just sit on there nice and straight if you don't have a breadboard you may be able to use a PCB board like this and just set it in there as well