Designing own development board for ATmega16

Hello friends,
I want to make a development board for atmega16. I need a schematic for doing it. I have some experience doing PCB's. So can any one provide a simple schematic which has controller and power supply circuit. also i need to know what should be connected to AVCC and AGND of atmega 16. Thanks in advance.

I have done a development board for atmega8 I'm attaching the proteus files and PCB layout files also images. But this development board is not working. I tried to blink an LED program but its not working. Please see to the pcb layout what mistake i have done.

The attachment is here.

Here is the images of the board

I tried the schematic on my own and its working fine with atmega 8 for a blinky program Its also fine with atmega 16 but the LED blinks very slowly in atmega 16. But its normal with atmega 8. can anyone tel me why the led is blinking slowly in atmega16??

Check the circuit will you create right map of diodes

@prajwalsnh, are you using same crystal for both? and did you configure fuse bits properly for Atmega16?
One suggestion, You can give a jumper for AVCC so user can select its own reference voltage or else go for VCC. You can also add a max232 with jumpers if someone want to use it just put the jumper on, else remove it if using them for GPIO purpose. You can add similar selective jumper selection with special function GPIOs wherever possible.

Nice work overall, Put some pictures of the board

@Ajay Bhargav

Thank you sir I have finished the etching of board. Soon i will post the pictures along with design files