Rechargeable Led Flashlight / Pocket lamp

Rechargeable Led Flashlight / Pocket lamp

Description

These are 2 small LED flashlights easy to construct :

• a small one with 28 'straw hat' mini LEDs
• a larger one with 40 LEDs

Inspired by this light : https://www.youtube.com/watch?v=rPqK4DuOdTQ

You will need :

• PCB board 2 x 8 cm for the small version, 3 x 7 cm for the larger one.
• 28 or 40 'straw hat' mini leds
• small on/off switch (10 x 15 mm)
• TP4056 charger module
• 18650 battery-holder
• rechargeable 18650 battery
• soldering iron, some wire, hot glue

The 'bottom' part has an opening for the charger module.
This version was designed for a module with mini USB connector.
If you prefer a charger module with micro USB or USB C connector, you may have to modify the size of the opening.

On the side there is a small round opening so you can observe the charger module led lights indicating the charger status while charging.

The hardest thing here is soldering the LEDs on the PCB board.
I used a nail to fold the LED-legs over to the left (anode, long legs +) or to the right (cathode, short legs -).
Make sure to test each row after soldering the legs.
Add a 1 Ohm resistor in the circuit to make the LEDs last longer.

Enjoy!