In this article, I will show you how to make your own AVR development board for
What is a development board?
In order to learn any MCU like AVR we need a AVR MCU that has all the basic
connections like power supply, crystal oscillator, proper reset signal and an ISP
connector for uploading a program. All these things are required for any project you
will make. A development board is a circuit board that contains all these connections
and it has connectors for IO pins of MCU so that they can be connected to any
external circuit with ease. So as you see its is like a basic framework. Once you
make a good development board and test it, you will have a solid foundation and for
your project you can concentrate on the specific requirement of that project. This will
also reduce the chance of making errors.
Some more complicated development boards have a RS232 level converters(for serial
communication) ,motor control chips etc.
Now let’s do it!
I have described the basic connections required by any AVR MCU in Part III of my
AVR tutorial series so I am jumping right to the schematic.
Development Board schematic
Things you will need are.
02 Voltage Regulator IC 7805
05 Capacitor (Electrolytic/Polar)
06 Capacitor (Electrolytic/Polar)
Making your own development board.
07 Capacitor (Electrolytic/Polar)
08 Capacitor (Ceramic Disk type)
09 Capacitor (Ceramic Disk type)
10 Capacitor (Ceramic Disk type)
11 Capacitor (Ceramic Disk type)
14 Crystal Oscillator
16 Tactile push to on Switch
17 Connectors, IC Socket, Power Jack,
General Purpose PCBs, wires etc
The voltage rating of C1 must be at least twice the input voltage while that of C2