Solar Cells

A

A.J.

Guest
Hey All,

I have a little unit that draws about 5mAh at 3.6V and I was thinking
about hooking up a small 3.6V battery via a solar panel to charge it
but I am having trouble finding any solar cells that are suitable.
Size is my main issue as I am looking for something to fit on top of a
match box or a whorst case 50 x 50mm. I don't think I will need any
more that 10mA closed circuit current, does anyopne know where I may
be able to find such a cell/panel??

Thanks in advance for any helpful replies!!

A.J.
 
A.J. wrote:
Hey All,

I have a little unit that draws about 5mAh at 3.6V and I was thinking
about hooking up a small 3.6V battery via a solar panel to charge it
but I am having trouble finding any solar cells that are suitable.
Size is my main issue as I am looking for something to fit on top of a
match box or a whorst case 50 x 50mm. I don't think I will need any
more that 10mA closed circuit current, does anyopne know where I may
be able to find such a cell/panel??

Thanks in advance for any helpful replies!!

A.J.
try here:
Click to expand...


http://www.solarbotics.com/

Then the solar panel option.
There are in the States but they will post to Aus.
 
A.J. wrote:
Hey All,

I have a little unit that draws about 5mAh at 3.6V and I was thinking
about hooking up a small 3.6V battery via a solar panel to charge it
but I am having trouble finding any solar cells that are suitable.
Size is my main issue as I am looking for something to fit on top of a
match box or a whorst case 50 x 50mm. I don't think I will need any
more that 10mA closed circuit current, does anyopne know where I may
be able to find such a cell/panel??
Click to expand...
If you have some spare silicon diodes, they will produce
about 0.3V at roughly 5mA or so in bright sunshine.
The diodes will need to be in a non-black package
to let the radiation in. (eg ceramic or painted-glass)

Also try some clear LEDs, the voltage is higher but the
current is usually less than a Si diode.
 
A.J. wrote:
Hey All,

I have a little unit that draws about 5mAh at 3.6V and I was thinking
about hooking up a small 3.6V battery via a solar panel to charge it
but I am having trouble finding any solar cells that are suitable.
Size is my main issue as I am looking for something to fit on top of a
match box or a whorst case 50 x 50mm. I don't think I will need any
more that 10mA closed circuit current, does anyopne know where I may
be able to find such a cell/panel??

Thanks in advance for any helpful replies!!

A.J.
Click to expand...
Either Jaycar or Oatley have a range of small solar panels, you might
find one to fit.
An alternative is to buy one or two of the many solar powered
calculators and rip them apart.

--
Regards,

Adrian Jansen adrianjansen at internode dot on dot net
Design Engineer J & K Micro Systems
Microcomputer solutions for industrial control
Note reply address is invalid, convert address above to machine form.
 
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