Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C

[hanzl]

> Bootstrap without active elements, may be:
> 
> Two aluminium capacitors and double switch:
> 
>   Off:  C1- ------------ Gnd
>         C1+ -- switch -- Cell+
>         C2- -- switch -- Gnd
>         C2+ ------------ Vcc
> 
>   Insert cell:
>         C1 == 1.5V
>         C2 == aprox. 1.0V
> 
>   On: C1- ------------ Gnd
>         C1+ -- switch -- C2-
>         C2- -- switch -- C1+
>         C2+ ------------ Vcc

Should work I think. I had to draw it for myself:

Off:

   -------------uuuuu------- io pin ---
  |               L                    V  D
  |                                    -
  +----       -------------- Vcc ------
  |    |     |
  |    |    --- C2
  |    |    ---
  |    |     |
 ---   |      -------
  =     -----        |
  |          |       |
  |         --- C1   |
  |         ---      |
  |          |       |
   ----------+-------+------ Gnd

On:

   -------------uuuuu------- io pin ---
  |               L                    V  D
  |                                    -
  |           -------------- Vcc ------
  |          |
  |         --- C2
  |         ---
  |          |
 ---         |
  =          |
  |          |
  |         --- C1
  |         ---
  |          |
   ----------+-------------- Gnd

Regards

Vaclav