Are these chips new? Is there any way they could have been programmed before?Where are they from? The markings on the chip in that image don't look like my Tiny85s. Can you post a close-up of the chip?
I normally use Opera but I have also looked at this Thread in Firefox and there is no sign of any images from LDavinci.But it appears some people can see them. If you are one of the lucky ones, what browser are you using?...R
The Atmel logo looks wrong to me, the lines in the logo are far too thick and the rightmost of the two vertical lines in the 'm' doesn't go all the way to the top.The writing is also far too white (that's what called my attention in the first place). I always had trouble getting the writing on Atmel chips to appear at all in photographs but yours is as clear as day. Notice that you can't read the writing on the Uno's ATMega328 in your first photograph - that's what I'd expect to see from that distance/angle.The date codes are a bit weird. You say you bought them ten months ago but the date codes say 2005/2006.All in all ... I'd say there's a good chance they're fakes. There might be nothing at all inside the chips.Don't worry, it's happened to people like Sparkfun, too: https://www.sparkfun.com/news/350
How can I make sure that they are fake ?
Check if any current is flowing when you connect the power lines. You should see a few milliamps. I doubt they'd put a resistor in there just to fool you.
Get a multimeter and check the resistance between Vcc and GND. If the chip is a dummy it will show 'infinite'.
I checked a few ATtiny85V-10PUs and they draw between 2.4 and 3.2 mA at 5V. That's with factory fuse settings and after a chip erase with AVRDUDE.
I can't imagine anyone would manufacture fake chips - it would be too expensive. I think it would be more "economic" to "buy" a load of reject chips and relabel them. If so they probably wouldn't show infinite resistance.
Of course someone might be making counterfeit Attiny's with poor quality control. Or maybe the patent(s) have expired on the design and they are legal but poor quality.
It will revive them if the issue is just an incorrect fuse setting.If that doesn't work, they are either dead or fake (or both).