When I first read about Arduino, I liked how compact it is, and how much processing power I can get. Also I loved the library and the idea of standard pins. I decided to buy a Mini-Arduino to play with. It costs me 160 L.E. in Egypt, that is about 27 USD. I decided to buy an ATMega 328 chip and try to imitate the board. I bought a crystal and couple of ceramic capacitors and some resistors, and started to build up an identical circuit.
[extra wires you can see connected to Arduino are for AVR programming]
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| Circuit Diagram using Fritzing |
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| My Actual Circuit identical to the diagram |
[extra wires you can see connected to Arduino are for AVR programming]
The end result is using ATMEGA-326 alone with nothing connecting to it except a resistor in the reset pin.
to make sure that they run at the same speed I developed a simple application that blinks the LED on a certain rate, and I uploaded the application to both chips using AVR. LEDs started to blink on the same rate.
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| Application Source Code |
The good side is that the handmade version costed me only 40 L.E. which 6.67 USD only.
Application can be downloaded from here.
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