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Octavio



Joined: 21 Jun 2003
Posts: 366
Location: Spain
Octavio
Post 05 Dec 2005, 17:12
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Matrix



Joined: 04 Sep 2004
Posts: 1171
Location: Overflow
Matrix
Wink

sure, a silly project

yeah, but it is a good advertisement for microchip pic low power consumption,

silly, because it could get almost anywhere that little amount of power needed, few mW,
and as we can see, it is connected to some pc, pc usually takes more than 50W of power, new ones more than 300W...
serial port can give out approximately 20mA at 8V, even a mouse runs from, and
for example, there are NI-MH battery chargers for USB, memory stick, so no need for potatoes to power a web server,

but it can be a good idea to use potatoes, or stepper motors from old floppy drives, for charging an 1F capacitor, and then supply a white led, as a light source, in case of emergency on the farm ;>
Post 06 Dec 2005, 01:02
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
what are electrical values (i don't know how it is called in english) for potato?
Post 06 Dec 2005, 01:36
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comrade



Joined: 16 Jun 2003
Posts: 1137
Location: Russian Federation
comrade
i-v characteristics?
Post 06 Dec 2005, 05:17
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Matrix



Joined: 04 Sep 2004
Posts: 1171
Location: Overflow
Matrix
;>>

well, a potatoe makes little current few micro amps, depending on the electrode surfaces, and on the picture i think the electrodes was fe and cu,
voltage, and current depends on the ambient temperature, and the type of metals used, there is a galvanic electrode potencial between the 2 electrodes,

under load i whould approximate those potatoes make about 0.3 V voltage under the load of that "server" Wink

and as we could see, they were connected in series, so 5 potatoes make about 1.5 V,

even more under light load, but no more than 1V per cell

i have tested such things once, a time ago, it works best with lemons ...
because of acid, but you can make voltage with even water, because of the electrode corrosion, so there will be potencial difference between the 2 electrodes...
Post 06 Dec 2005, 06:30
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comrade



Joined: 16 Jun 2003
Posts: 1137
Location: Russian Federation
comrade
u are smart
now tell me what happens to an inductor in dc steady-state
Post 07 Dec 2005, 01:25
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Matrix



Joined: 04 Sep 2004
Posts: 1171
Location: Overflow
Matrix
inductor will have dc voltage drop of u=i*r

inductor is a simple copper wire, coiled...
winded up in any way.

bty, im designing electronics as primary,
assemble, and repair them if needed,

im a bit sorried i still don't have my site running, up, i have many work in progress.
Post 07 Dec 2005, 16:01
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