learnt about soldering.
the angle hits both materials at an angle to heat up the materials. then, solder
bad solder examples from adafruit:
remember: solder has to flow through the gap to both sides.
a.b.c: always be cleaning & always be comfortable.
as long as the solder tip is shiny, it is good. apply solder and fling it off the wand-tip.
made these two:
^ toggle switch with simple button.