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voltage regulation

R

robert

Jan 1, 1970
0
I need to run a mini display that requires about 3.2 V. I have regulated 5V
running on another board. Is there any problem with just using 3 diodes to
drop the voltage to close to the disply's requirements?
Any comments would be welcome.

Robert
 
P

Phil Allison

Jan 1, 1970
0
"robert" <[email protected]
I need to run a mini display that requires about 3.2 V. I have regulated 5V
running on another board. Is there any problem with just using 3 diodes to
drop the voltage to close to the disply's requirements?


** Nope.

But drop a nice electro ( 6 volt, 220uF) across that reduced rail.



......... Phil
 
D

dmm

Jan 1, 1970
0
I need to run a mini display that requires about 3.2 V. I have regulated 5V
running on another board. Is there any problem with just using 3 diodes to
drop the voltage to close to the disply's requirements?
Any comments would be welcome.

Robert

How much current does the mini display require? Can the 5V supply on the other
board maintain the regulation on its own board, as well as supplying the display board?
 
G

Greg the Grog

Jan 1, 1970
0
Phil Allison said:
"robert" <[email protected]


** Nope.

But drop a nice electro ( 6 volt, 220uF) across that reduced rail.



........ Phil

That's a big call big Phil.
I prefer the other response better, at least he is asking for a bit more
information.
Like WTF is a 'Mini Display'?
Are we talking just powering it or is it in need of some data and shite too?
Maybe it's hanging of a data bus..... 3 diodes per bit +/- some chip select?
Thats a lot of diodes, do you really think it's a good idea?
Maybe there is a better way.... (that doesn't use valves or 555s)

;-)













(flame on!)
 
R

robert

Jan 1, 1970
0
The "mini display" is the screen from a mobile phone (10mA). The 3.2V will
also power a picaxe microprosessor (prob. 100mA?? i'm guessing) so be be
generous no more than 200 mA for the lot.

Robert
 
P

Phil Allison

Jan 1, 1970
0
"Greg the Grog"
"Phil Allison"
"robert"

That's a big call big Phil.


** Bullshit it is.


Snip rest of your irrelevant & mindless shite.



.......... Phil
 
K

Ken Taylor

Jan 1, 1970
0
robert said:
The "mini display" is the screen from a mobile phone (10mA). The 3.2V will
also power a picaxe microprosessor (prob. 100mA?? i'm guessing) so be be
generous no more than 200 mA for the lot.

Robert
Is it actually (or critically) 3.2V, or is 3.3V acceptable? 3.3V is a
standard and regulator chips are readily available.

Ken
 
R

robert

Jan 1, 1970
0
the voltage is not critical. Anywhere between 3 and 3.6 is fine.

robert.
 
K

Ken Taylor

Jan 1, 1970
0
Then use a 3.3V regulator for the display and run the rest of the circuitry
from the 5V or as required.

Ken
 
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