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Newbie needs some help with simple circuit

Finding0

Apr 9, 2024
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Apr 9, 2024
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Hello, to start off I am not very good at electronics and that is why I need some help. I plan on making jewlery that is illuminated by a uv led powered by a lipo battery that is charge qith a solar cell1000000612.jpg. The materials I am working with or at least think are correct are:


3.3v LED
Details

You can connect with any 3V battery directly

All LEDs work in 3-3.3 Vdc
Do not need add any resistor, it can work with normal 3V battery (Example: CR 2032 battery, CR 2025, ..."3A X 2", 2A X 2 or any 3V battery , )

If you want the LEDs work in other voltage,we provide below resistors in the package too
25 resistors (not pre-soldered) for 3.5~5V are included .
25 resistors (not pre-soldered) for 5~9V are included .
25 resistors (not pre-soldered) for 9~14V are included .

Specifications :
The LEDs size is : (length)06" X '03"(width) X 03"(height)
-Luminance intensity: 300 mcd / 120¡ã Viewing Angle
-Emitting color: UV
-Forward voltage:3-3.3VDC Compatible.
(if you need the LEDs work in other voltage, please add resistor)
-Forward current Typical: 15mA or below; Max: 20mA
-Viewing angle:120¡ã Viewing Angle
Applications & Installations:
Suitable used in any small model, cosplay, small model building, Very low power consumption, and high luminous intensity


5.3v solar cell 2994-KXOB25-02X8F-TB-ND


3.7v 30maH Lipo battery with overcharge and discharge protection


2 silicon diodes

Where I am running into most trouble is figuring out which silicon diodes I need to protect the the battery as its charging limit is 4.20V but the solar cell puts out 5.3V

Any help would be very appreciated. Thank you
 

davenn

Moderator
Sep 5, 2009
14,279
Joined
Sep 5, 2009
Messages
14,279

welcome :)

ummmm what make type is that LED ?
If the datasheet specifically says no resistor, then Ok, otherwise ......

3.7v 30maH Lipo battery with overcharge and discharge protection

is that built into your model of battery ?

Where I am running into most trouble is figuring out which silicon diodes I need to protect the the battery as its charging limit is 4.20V but the solar cell puts out 5.3V

5.3V is most likely the open circuit voltage of the cell. It's usually what is stated in datasheets. check it with a multimeter.
Under load voltage will be lower

cheers
Dave
 
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