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ATTINY85
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ATTINY85

by Tyran on Fri Nov 09, 2007 11:23 pm

Hi,
the remote uses an ATTINY85V-10-PU controller but unless the internal oscillator is not used for the IR-LED's my question is if the remote is working with an ATTINY85-20-PU? This is because my electronic-shop only gives me the ability to choose between this three ATTINY85 controller-types:

-> ATTINY85-20-PU
-> ATTINY85-20-SU
-> ATTINY85V-10-SU

I know that I can order the last one but I prefer the DIP version more than the SOIC one (better soldering and you have the socket ability).

And how important is the low-power version of the chip? the datasheet says that the normal version needs a Vcc of 2.7 - 5.5V an the low-voltage version needs 1.8 - 5.5V.. planning to use the remote with 3xAA 's.

Is the software compatible with the other chip by using the external oscillator?

thx in advice,
Tyran
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by adafruit on Tue Nov 13, 2007 8:41 pm

you can go with the 2.7V version but its 'better' to go with the 1.8V if you can.

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by Tyran on Tue Nov 20, 2007 6:21 pm

Ok, thanks!

So can I use the ATTINY85-20-PU mentioned above?

This chip has 20Mhz instead of the 10Mhz but i think that the IC is getting his frequenzy from the external oszillator?! Is that right?

Tyran
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by adafruit on Thu Nov 22, 2007 2:37 am

yes

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by Tyran on Thu Nov 22, 2007 5:12 am

Ok!

Thank you! :wink:
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by maltman23 on Sat Nov 24, 2007 12:48 am

It's just that there is not a lot of leeway with your batteries going weak -- if the voltage dips below 2.7v while pulsing the IR emitters, then your micro may reset itself (with its Brown Out Detector). This is why it's better to use the "v" part -- then the batteries can be way weak, and your TV-B-Gone can still make it all of the way through its transmit sequence, thus turning off almost any TV you come across (without having to change the batteries very often).

Mitch.

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Please be positive and constructive with your questions and comments.