What do you need to buy in the radio shop for experiments with Arduino?

Question

Arduino

When connecting LEDs, one resistor is used, when connecting other components, others. How to assemble a minimum set of radio components so as not to run to the radio store every time? How to understand in general what resistor values, for example, may be needed? Or does it not happen and will you have to run to buy in each specific case?
What else, besides resistors, may be needed?

Answer 1

I took as a base a set of Amperka - Matryoshka Z, and then just looked for each item in a local store. The set is quite balanced, plus they have an amazing training manual on the site, sharpened just for their set.
Then just make adjustments to the purchased - more engines? switches? transistors?

Answer 2

There are ready made kits.
Even specifically for Arduino.
A pack of resistors of different ratings, etc.

Answer 3

How to understand in general what resistor values, for example, may be needed?
In order to understand where which resistors are needed, there is Ohm's law.
It doesn't happen if you're not a professional developer.
You will need what is necessary for your design. In theory, you won’t have enough money for everything that you might need.

Answer 4

For experiments, the Young Physicist set is more suitable. In electronics, a circuit is first drawn, a calculation is made, then a device prototype is assembled on a breadboard.