Computing > Vintage Computing

Overclocking an uncooled ATtiny to 44.24Mhz

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ralphd:
And it even worked occasionally at 3.3V!  I also tried an external 3-stage ring oscillator with a 7404 which generated a 28Mhz clock.

http://nerdralph.blogspot.ca/2015/07/externally-clocking-and-overclocking.html

I've seen ATtiny85's overclocked to 30Mhz, and with the PLL generate a 60Mhz output.  May try that in the future as a source for a ~60Mhz clock...

JoeN:
Sounds like fun but don't put something like that into a project you might actually use someday.

For fun today, I picked up some PCBs that were lying around at the local surplus store for a dollar each.  Some of them actually had decent parts on them - SRAM, FLASH memories, a 68K ROMless controller, some big inductors, Maxim RS232 chips, etc.  I just desoldered my new used parts.  That's what I do for fun, I guess.  You overclock.  We are having fun on the cheap!  Better idea than drugs!

amyk:
I suspect the clock speed is limited by gate delay and not power dissipation.

technix:

--- Quote from: JoeN on July 29, 2015, 03:39:45 am ---Sounds like fun but don't put something like that into a project you might actually use someday.

For fun today, I picked up some PCBs that were lying around at the local surplus store for a dollar each.  Some of them actually had decent parts on them - SRAM, FLASH memories, a 68K ROMless controller, some big inductors, Maxim RS232 chips, etc.  I just desoldered my new used parts.  That's what I do for fun, I guess.  You overclock.  We are having fun on the cheap!  Better idea than drugs!

--- End quote ---

Ooh my standard procedure of demolishing electronics is a trip to the hot air gun and take all identifiable chips. I scored an ATmega128 once that way, maybe I can put that into a project somehow.

JoeN:
Here is what I got from one board for 93 cents ($1 with tax).  The inductors I mention are on a different board and I haven't done that one yet.  The switches came out hard, not sure if they are good or not.  One crystal's plastic pad is a little warped too.  The other parts came out fine.  It was some sort of industrial ARCNet/RS242/RS485 board.


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