I’m a high-schooler with zero dollars in the bank. I can’t really afford to buy a $60 Arduino from RS when I could buy it for $15 on ebay, from Shenzhen or Hong Kong.
I understand that I am hurting your business by not buying your products, but by doing so I educate myself and others.
I just want to say thank you for teaching me how to make my own products when your products are too expensive.
First of all, I want to give absolute credit to Tequals0. You should check out his instructables account and follow him.
So, over the summer I needed to find a way to get OFF of the arduino board and onto smaller/cheaper microcontrollers for more permanent projects.
For a while I have been using the ArduinoISP sketch to upload files, but if I wanted to upload a hex file, I needed a real programmer (I needed a programmer that programs through the ISP and not through a serial port).
SO I looked at adafruit’s USBTinyISP, which I must say, was VERY cheap comparing to Atmel’s other programmers. USBTiny is also supported by Arduino IDE, so that’s great too.
As cheap as it was, it was $22; I don’t spend $22 on one thing.
so, let me get started on how to make your own usbtinyisp
Step 1: Design
Attached in the zip folder are some PCBs I made for your convenience. There is a DIP version and an SMT version. I did SMT this time just for fun. There is no difference.
You don’t have to use the PCBs if you just want to make a perf board or something. There is a schematic from Tequals0 and that is all that matters
Attached in that zip files are other important stuff too, so I will refer to those.
For more detail: DIY $5 USBTinyISP