Which board to use

Other Hardware General Electronics
1

I am controlling 2 servos currently using uno r3. Is there a less expensive board that will co troll 2 servos and still use the samec
Code?

2

Nano or Pro Mini (nano has on-board USB-serial adapter, pro mini you connect to an external one, which makes the board smaller).

Clones of both are $2-3 on ebay. They use the same microcontroller and are 100% compatible unless you're reprogramming the 16u2 to get special USB functionality (this is a pain to do, and hardly anyone does it; you'd know if you were doing this).

3

rayluc:
I like the smaller idea. I don't understand tho about a USB serial adapter. Is this what' connects the board to the computer to upload the program?

Yes.

rayluc:
How would I download a program to the pro mini?

With the adapter. The adapter plus the Pro Mini becomes effectively, a Nano but when you have downloaded the code, you can remove the adapter and use the smaller board.

Here:

Or here:

Note that these (unlike others on eBay, Aliexpress etc.) have the necessary "DTR" pin to facilitate code downloading, but you need to cut off the 3V3 pin.