Rounder - The Battery-Powered LED Lamp
Description
**Please make sure you understand wiring and batteries before you do this project. It's pretty easy, but I cannot be held responsible if you don't pay attention to your wiring.** This is Rounder: a battery-powered LED lamp that is perfect for camping, power outages, or reading under the covers. The lamp uses some common components including an inexpensive TP4056, 18650 battery, wiring, toggle switch, and some basic know-how with a soldering iron. The parts you will need to print are as follows: 1. The Lamp Bottom -- Print this with at least 25% infill from whatever filament you choose. I suggest PETG or PLA. You WILL need small supports and can use "Tree" supports via Cura (on the inside and out of the print) OR, if you don't want to make yourself mad removing supports after you print, you can use custom supports on the inside of the base to support the inside lip. I am a fan of the custom supports plugin by Krasimir Stefanov you can download for free for Cura. [https://bit.ly/2YPN7Rk] 2. The Lamp Top -- I suggest you print this with a translucent/transparent filament so more light will escape. Print this at no more than 20% infill. This will not need supports. 3. The TPU Ring -- Print this in...you guessed it...TPU at around 20% infill. No supports. The assembly of the three parts is fairly self-explanatory. Check my pictures to see how it all goes together. To wire up the lamp, you will need the following: 1. Wire (red and black) 2. Solder + Soldering Iron 3. 5V LED strip (I use white, but you can use whatever color you want. MAKE SURE NOT TO USE ANYTHING ABOVE 5V LEDs) https://www.amazon.com/gp/product/B08M65DKZ7/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 4. A round, three pin toggle-switch. https://www.amazon.com/gp/product/B07SGWXB3P/ref=ppx_yo_dt_b_asin_image_o06_s00?ie=UTF8&psc=1 5. An 18650 battery. I used some old, upcycled batteries from an old laptop. 6. A TP4056. I designed this to use a USB-C type, but you can modify the STL if you feel the need to use a micro-usb type charger. [https://www.amazon.com/gp/product/B08F7QSLN7/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1] 7. A pre-wired 18650 Battery Holder (or, if you have a spot welder and nickel strips, go to town and make your own!) [https://www.amazon.com/gp/product/B00LSG5BKO/ref=ppx_yo_dt_b_asin_image_o06_s00?ie=UTF8&psc=1] 8. A hot-glue gun 9. A basic understanding of wiring. Instructions: 1. Solder the + and - wires from the battery holder to the B+ and B- on the TP4056. 2. Solder two short black wires on the ground pin (usually the goldish colored pin) on your toggle switch. The wires do NOT have to be long, just long enough to reach the TP4056and the led strip. Cover your connection with heat-shrink tubing. 3. Connect a short red wire to both the ACC and PWR pins on the toggle switch. 4. Solder the MIDDLE red wire (the PWR) to the "Out +" on the TP4056. 5. Solder the OUTSIDE red wire (the ACC that is on the complete opposite side of the toggle switch as the ground pin) to the + on your LED strip. 6. Solder ONE of the black ground wires from the toggle switch to the "OUT -" on the TP4056. 7. Solder the OTHER black ground wires from the toggle switch to the negative (black) wire on the LED strip. 8. Check your wiring and insert the 18650 battery (pay CLOSE attention to the + and - of the battery...if you cannot tell the difference and mess this up you may have a bad time.) 9. Before putting anything in the lamp bottom, click the toggle switch on to ensure the lights come on. 10. Remove the battery then insert everything inside the lamp bottom, including the battery holder, TP4056, wires, and LED strip. 11. Hot glue the TP4056 so the USB port lines up with the USB cutout on the lamp bottom AND hot glue the battery holder down. 12. Re-insert the battery (again...PAY ATTENTION TO THE POSITIVE AND NEGATIVE ORIENTATION OF THE BATTERY) and verify once more the lights come on. 13. Place the LED strip wherever you choose inside. I use sticky-backed strips and run them around and around the inside of the lamp bottom. Do this OR do whatever feels right. This is YOUR project. You be you. 14. Screw on the top of the lamp and enjoy! You will need to provide your own USB-C cord and wall charger (of course). A small red LED on the TP4056 will light up when it's charging the battery. When it's done charging, the red LED will switch off and a blue LED will come on informing you it's done charging.
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