Arduino prototype

How can I build a board that I can save a program on to, to install into my project so that I can just plug and play. Therefore I wouldn't need an arduino board everytime I operate my prototype.

Arduino is not good for your need? It is a prototype board.

Buy an 'Arduino Pro Mini'
This will be sufficient for many projects.
Cost ~$2-3
Get 5+ :wink:

http://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR12.TRC2.A0.H0.XArduino+pro+mini.TRS0&_nkw=Arduino+pro+mini&_sacat=0

Can use an UNO to program these but you should get one FTDI as a dedicated programmer.

http://www.ebay.ca/sch/i.html?_odkw=Arduino+pro+mini&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR12.TRC2.A0.H0.Xftdi+.TRS0&_nkw=ftdi+&_sacat=0

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I assume you wanted to build a board with a standalone Arduino, that means you dont need an Arduino board in your board.

Source: GitHub - MCUdude/MightyCore: Arduino hardware package for ATmega1284, ATmega644, ATmega324, ATmega324PB, ATmega164, ATmega32, ATmega16 and ATmega8535

I used this schematic to create a system which can program using a USB FTDI cable.

See the board I developed recently.

I'm with LarryD on this one; the 328P mini from China is your best bang for the buck.

Ray