Sorry for the post, but I really didn't have a lot of time to check all of your posts much.I realised that I have two choices.
The first one is to have each time my Atmega328 from my original arduino board removed to upload a sketch to another pre-bootloaded arduino.(using cables)
The second one uses a USB to Serial Communication Board so you can upload sketches whenever you want. (work as original arduino)
do i have to buy a USB to Serial Communication Board?
I want my own arduino based stripboard, to communicate with my pc through a usb cable, but do i have to buy it? It costs a lot and i want to make more than one arduino...
I bought 4 Atmega328's with arduino pre-bootloaded. The thing is that if I buy 4 USB to Serial Communication Boards, considering that I need to make some more, it will cost a lot of money...
Please let me know if there is any other easy way to do it...
I just want to connect it the first time to upload a sketch and test it.(its going to be put in circuits for lights home applications)
So I dont want it to cost more than 10 euros each, if it is possible....