The layout allows you to build a circuit, but without soldering. What for? Because you don’t want to assemble with solder if any single part is faulty or you misunderstood the circuit. It can also teach beginner electronics and circuit engineering students about the various components that go into many devices.
The breadboard allows DC injection using channels on the left and right sides of the board. The current through these channels conducts vertically. The rows on the breadboard allow the current to follow horizontally. Here’s what the back of the breadboard looks like — remember that each length of metal functions as a wire:
I’ve watched a few tutorials on YouTube that teach the basics of working with layouts — and Ian Buckley’s video below is one of my favorites:
Soldering irons run the gamut from expensive to cheap — I recommend this iron. While you can prototype circuits on a breadboard, you’ll need some soldering skills to do a lot more.
One particular method from this tutorial that I don’t recommend: solder click . When clicked, the solder ejects liquid metal and can be dangerous. I recommend that users instead use a metal spacer and rub a heated soldering iron over it to remove the solder. There will be dirt on the tip of the soldering iron, but for the main work it does not matter much.
Here is an example of using a metal Brillo pad (not actually a Brillo pad) to clean your soldering iron tip:
Using a multimeter
Multimeters perform a number of tasks. The most common use is to measure current, resistance, and voltage. They are also relatively inexpensive: a cheap model costs about $6 — more expensive models cost upwards of $20. Professional models cost hundreds of dollars.
Be aware that multimeters can damage or damage the electronics you are working on. Check out at least one tutorial if you’ve never used a multimeter before. There are quite a few clips on YouTube. I chose one that is relatively complete, being broken up into a series of four parts. It covers security and diagnostics in a reasonable and understandable way.
Multimeters can do a lot of practical things as well as troubleshoot printed circuit boards. For example, you can also check batteries: