Rechargeable Led Flashlight / Pocket lamp

thingiverse

<h3>Rechargeable Led Flashlight / Pocket lamp</h3> <b>Description</b> <p> These are 2 small LED flashlights easy to construct :<br> <ul> <li>a small one with 28 'straw hat' mini LEDs <li>a larger one with 40 LEDs </ul> <p> Inspired by this light : https://www.youtube.com/watch?v=rPqK4DuOdTQ <p> You will need : <ul> <li>PCB board 2 x 8 cm for the small version, 3 x 7 cm for the larger one. <li>28 or 40 'straw hat' mini leds <li>small on/off switch (10 x 15 mm) <li>TP4056 charger module <li>18650 battery-holder <li>rechargeable 18650 battery <li>soldering iron, some wire, hot glue </ul> <p> The 'bottom' part has an opening for the charger module.<br> This version was designed for a module with mini USB connector.<br> If you prefer a charger module with micro USB or USB C connector, you may have to modify the size of the opening. <p> On the side there is a small round opening so you can observe the charger module led lights indicating the charger status while charging. <p> The hardest thing here is soldering the LEDs on the PCB board.<br> I used a nail to fold the LED-legs over to the left (anode, long legs +) or to the right (cathode, short legs -).<br> Make sure to test each row after soldering the legs.<br> Add a 1 Ohm resistor in the circuit to make the LEDs last longer. <p> Enjoy!