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Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C
From: |
hanzl |
Subject: |
Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C |
Date: |
Thu, 24 Mar 2005 13:52:11 +0100 |
> As other people seem to be taking this seriously, I have to point out
> that you have missed the need to control the generated supply voltage.
> Without control, VCC will just increase until it blows up the AVR or
> some arbitrary limiting factor comes into play. Perhaps you think
> that you have a voltage doubler here. This is not so. A boost
> converter requires feedback from the generated voltage to control the
> switching mark/space ratio in order to produce the desired output.
I thought either predetermined mark/space ratio could do (with known
power consumption) or the AVR could somehow use the A/D circuitry to
deduce the Vcc and act accordingly (thought I am not sure this could
be done without more external parts).
In any case, software error may be lethal and AVR is in danger of
suicide.
Or call it a feature ;-) - imagine that AVR knows some secret and it
may destroy itself as a last resort when under attack ;-)
> I think it is an interesting puzzle. May I have your permission to
> use it in interview situations?
Sure, it is quite free ;-)))
(And somting like this may well be the best use for this 'design'.)
Regards
Vaclav
- Re: [avr-chat] M8535 ports, (continued)
Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Dmitry K., 2005/03/24
RE: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Eric Fu, 2005/03/24
Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Graham Davies, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C,
hanzl <=
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, René Liebscher, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, hanzl, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Joerg Wunsch, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Colin O'Flynn, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Brian Dean, 2005/03/24
- Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Joerg Wunsch, 2005/03/24
Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C, Bob Paddock, 2005/03/24