USBTinyISP ATtiny85 error

[baicker]

I had bought the Attiny85v twice even though it is very infrequent in my country, 10 pieces every time, but very bad luck, all chip had a bad signature.

I had programed the Atmega64A once, so i don't think there was any problem with my connections, i used the usbtiny programmer, when i executed the command, show the error:

Code: Select all

C:\>Avrdude -c usbtiny -p t85
Avrdude: Device signature = 0xffffff
Avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override this check.

i had tried 20 pieces, always show this error.

can anybody help me ?
I will be crashed....

help...help...

[adafruit]

check your wiring, make sure its powered, etc. we program thousands of these chips, they do work with the usbtinyisp