hello everyone
Today, this is my first time post here, rather than replies. I am very happy to come to this forum to learn more knowledge of electronics.I share a project I've ever done, an AVR/51 ISP programmer, Maybe it is simple, I think there must be someone who need it. PCB and schematic is easy to understand, people who use it can also do some improvements needed. A few years ago, I made some when I learned AVR.Recently, a project need it, I have to make some.
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PCB picture below, it is actually more like a single layer board, bottom layer only has one line.
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I just sent my gerber files to Smart-prototyping who is in China to produce my PCB. and I will buy ATmega and the other components from Digikey. I will solder them by myself.
After assembling the board, download the firmware program to AVR ISP programmer. You need an additional downloader to download to the programmer. I buy it from sparkfun(https://www.sparkfun.com/products/11801). In addition, the computer needs to install the driver.

Thanks
dreamtale