AVRISP mkII Design Kit
This is an In-circuit Serial Programming tool, based on AVRISP-mkII protocol, using USB to communicate with the host
(Atmel AVR Studio v4.1x). You might only need to spend 30 minutes to assemble it.
Specs and Features:
[1]. On board controller: ATmega8L from Atmel, running at 12MHz, drives the USB.
[2]. Using AVRISP mkII protocol that runs under Atmel AVR Studio v4.1x environment. Support most devices from Atmel.
[3]. Have both 10-pin and 6-pin IDC connector footages.
[4]. Can supply 5v or 3.6v for the target board.
[5]. Compact size: only 3.2cm x 8.3cm.
[6]. The circuit is compatible with USBasp, so it can be switch to USBasp by updating the FW on board.
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Schematic of AVRISP-mkII programmer

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How to Use the Programmer:
(1) install AVR Studio v4.1x (download from http://www.atmel.com);
(2) connect the programmer to USB port, and then start running AVR Studio.
(3) click "tool" in tool bar, and then go "program AVR" -> "auto connect". Or you can choose "program AVR" -> "connect", and then "t;AVRISP mkII".
A pull-down manual will show up if the connection is successful! Usually, first of all, you need select the AVR device taht you're going to program; and the ISP communication speed if necessary from 'main' tab. Afterwards, everything else is simple and easy.
Order information:
$7.50/each kit, plus $2.50 S/H fees
NOTE: on-board controller (ATmega8L) will be programmed when shipped.