TV BE GONE CLONE CLOCK SPEED PROBLEM

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squaresine
 
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Joined: Thu Feb 20, 2014 8:54 am

TV BE GONE CLONE CLOCK SPEED PROBLEM

Post by squaresine »

Several of my students designed their own pcb for a clone of V1.1 of the TV BE GONE. They are trying to use ATiny85-20PU with a 8mHz crystal. The circuit is emitting infrared codes. Attached image is an oscilloscope(1v/div. & 20ms/div.) look at the first IR code being transmitted.
Attached image is an oscilloscope(1v/div. & 20ms/div.) look at the first IR code being transmitted.
Attached image is an oscilloscope(1v/div. & 20ms/div.) look at the first IR code being transmitted.
tvbegone1stCode.jpg (79.01 KiB) Viewed 591 times
I believe we need to reconfigure the fuses on the ATiny85-20PU to work with the external 8mHz resonator. Would any one have insight to what exact command we can use in avrdude to accomplish this? Is this even our problem? Thank You so Much for any responses, we only have a day left in the school year!

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squaresine
 
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Joined: Thu Feb 20, 2014 8:54 am

Re: TV BE GONE CLONE CLOCK SPEED PROBLEM

Post by squaresine »

Answer: avrdude -c usbtiny -p t85 -u -U lfuse:w:0xcf:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m

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