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Mike Raiford wrote:
> Hehe... with a handfull of caps, some diodes and a 555 timer as the
> clock source, you can create your very own chargepump.
This, apparently, is why USB flash drives can work. They use a charge
pump to generate the large voltages needed to erase a block prior to
reprogramming it.
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Wow. I kind of feel sorry now for all the people who grew up after ICs were
common and don't know how capacitors work or what a power transistor is for.
--
Darren New, San Diego CA, USA (PST)
Eiffel - The language that lets you specify exactly
that the code does what you think it does, even if
it doesn't do what you wanted.
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Darren New wrote:
> Wow. I kind of feel sorry now for all the people who grew up after ICs
> were common and don't know how capacitors work or what a power
> transistor is for.
Any specific reason?
Anyway, I only work with low-power electronics, so I don't know a whole
heap about how to engineer (say) the lifting motors for a gigawatt damn
sluce.
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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On Fri, 04 Jun 2010 10:22:44 +0100, Invisible wrote:
> Also, most transformers are small square lumps about the size of your
> thumb.
I'm about to blow your mind:
http://www.google.com/images?hl=en&source=imghp&q=power
+transformer&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai=
Jim
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>> Also, most transformers are small square lumps about the size of your
>> thumb.
>
> I'm about to blow your mind:
>
> http://www.google.com/images?hl=en&source=imghp&q=power
> +transformer&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai=
Yeah, well *obviously* a transformer than supplies 20,000 homes is going
to be slightly bigger than the one that supplies the 20 mA to the
speaker in your pocket radio. :-P
The thing is, you don't have a transformer like that IN YOUR HOUSE. And
yet, my dad for some reason DOES have this monster transformer...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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On Fri, 04 Jun 2010 18:22:04 +0100, Orchid XP v8 wrote:
>>> Also, most transformers are small square lumps about the size of your
>>> thumb.
>>
>> I'm about to blow your mind:
>>
>> http://www.google.com/images?hl=en&source=imghp&q=power
>> +transformer&gbv=2&aq=f&aqi=&aql=&oq=&gs_rfai=
>
> Yeah, well *obviously* a transformer than supplies 20,000 homes is going
> to be slightly bigger than the one that supplies the 20 mA to the
> speaker in your pocket radio. :-P
>
> The thing is, you don't have a transformer like that IN YOUR HOUSE. And
> yet, my dad for some reason DOES have this monster transformer...
I do have a pretty good sized transformer in a PSU for an amateur radio
rig in the basement.
Jim
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On 6/4/2010 1:22 PM, Orchid XP v8 wrote:
> The thing is, you don't have a transformer like that IN YOUR HOUSE. And
> yet, my dad for some reason DOES have this monster transformer...
I have one about the size that you mentioned. It's a neon sign
transformer that puts out several kilo-volts. I used to have it hooked
up to a rather large Tesla coil. The coil was dismantled many years
ago, but I still held onto the transformer, just in case. ;-)
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Kyle wrote:
> On 6/4/2010 1:22 PM, Orchid XP v8 wrote:
>> The thing is, you don't have a transformer like that IN YOUR HOUSE. And
>> yet, my dad for some reason DOES have this monster transformer...
>
> I have one about the size that you mentioned. It's a neon sign
> transformer that puts out several kilo-volts. I used to have it hooked
> up to a rather large Tesla coil. The coil was dismantled many years
> ago, but I still held onto the transformer, just in case. ;-)
I would imagine that to HOLD ON TO a transformer like that would be...
inadvisible. (!)
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Orchid XP v8 wrote:
> Kyle wrote:
>> On 6/4/2010 1:22 PM, Orchid XP v8 wrote:
>>> The thing is, you don't have a transformer like that IN YOUR HOUSE. And
>>> yet, my dad for some reason DOES have this monster transformer...
>>
>> I have one about the size that you mentioned. It's a neon sign
>> transformer that puts out several kilo-volts. I used to have it
>> hooked up to a rather large Tesla coil. The coil was dismantled many
>> years ago, but I still held onto the transformer, just in case. ;-)
>
> I would imagine that to HOLD ON TO a transformer like that would be...
> inadvisible. (!)
>
Only while there is still some power left in it.
That kind of voltage and current is safe if you respect it. Had a
impromptu band play on campus, where the bass line was a jacob's ladder
sticking out of the back of a microwave. The drum stick was a metal tip
glued on to a good length of acrylic. No Tesla coils, yet.
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> The thing is, you don't have a transformer like that IN YOUR HOUSE. And
> yet, my dad for some reason DOES have this monster transformer...
People who have moved from 110V countries to 220V ones (or vice versa) often
have a chunky transformer like that so they can run their old equipment.
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