Solder your first joint
Tin the tip, heat the pad, feed the wire — the five-move technique behind every clean, reliable connection you’ll ever make.
Soldering looks intimidating and is genuinely easy — once you understand one principle: you heat the parts, and the parts melt the solder. Beginners melt solder on the iron and dab it on; that gives a cold, dull, unreliable blob. Do it the right way and you get a shiny, strong joint every time.
Your gear
- A temperature-controlled soldering iron (set to ~350 °C)
- Rosin-core solder (0.6–0.8 mm is forgiving)
- A brass-wool tip cleaner or damp sponge
- Safety glasses and a ventilated space
!
Two safety basics
The tip is 350 °C — treat the whole front end as hot. And solder fumes are flux, not lead vapour, but you still don’t want to breathe them: work in a ventilated space or with a small fan pulling smoke away.
The five-move joint
- Tin the tip. Melt a little solder onto the clean hot tip — it should go shiny. This helps heat flow into the joint.
- Heat the joint. Press the tip against both the pad and the component leg for 1–2 seconds.
- Feed the solder. Touch the solder to the joint (not the tip). It melts and flows around the leg, forming a cone.
- Remove the solder, then the iron. In that order.
- Let it cool undisturbed for a couple of seconds. Don’t blow on it.
What a good joint looks like
Aim for a smooth, shiny volcano cone that wets up both the pad and the leg — like the cross-section above. Compare against the two common faults:
- Cold joint — dull, grainy, blobby. Reheat and let the solder flow properly.
- Too much solder — a round ball hiding the pad. You only need enough to form a cone.
Heat the work, not the solder. Get that one habit right and every joint after it gets easier.
Practice on a cheap perfboard or a kit before your real project — twenty joints in, your hands will know the rhythm.