Programming an ATtiny85 Recently I ordered some ATtiny85's from Jameco, and I've been trying to upload code to them through an Arduino Uno, following the instructions from this video on YouTube. I've been getting a lot of unexpected errors and I am now wondering if the chips I bought are the problem. Here are the specs from the Jameco website:

Flash (Kbytes): 8 Kbytes
Pin Count: 8
Max. Operating Frequency: 20 MHz
Power Supply: 2.7 - 5.5V
Operational Range: Industrial (A) (-40°C to 85°C)
CPU: 8-bit AVR
Number of Touch Channels: 3
Hardware QTouch Acquisition: No
Max I/O Pins: 6
Ext Interrupts: 6
USB Speed: No
USB Interface: No

Does the &quot;USB Speed: No; USB Interface: No&quot; mean these aren't programmable by my set up? Or is there is anything else I should know about these chips? Do I need to get new ones that are different?
Before you panic (try not to panic) and buy new chips, test the existing ones. See my page about detecting chip signatures which has links to code on Github for a sketch you can run on your Uno, to test the ATtiny85.





You can also upload code from a .hex file (which the IDE produces) by using a different sketch (same code link) from this page about a hex uploader and wiring like this (you also need an SD card adapter):





The first sketch and wiring should at least confirm your chips are OK. The second one is an alternative way of programming them.