Ive got this sim900 with male headers for power.
I need to power it from a battery pack which comes a USB cable which I’ve cut/peeled and fitted with 2 male pins as well.
I need to interconnect the power-male-header-terminals from the sim900 to the power-male-headers from the battery pack to the power-terminals to the nano.
So I did this, soldered the header pins from the sim900 to a small piece of old perfboard. Then soldered the 2 power pins from the battery pack usb cable and then the 2 power cables out to the nano. I know it looks like sh*t but I think my error was to try to solder the connections on adjacent rows/columns, so closely, that it was hard to get the iron tip in there.
Is there a neater way that doesnt involve a breadboard? I found out the breadboard connections really mess up my power delivery to the sim900 making it fail to register repeatedly.