led grow lights

thingiverse

Plant-led grow light box with 10 LEDs. I built mine using 5 blue LEDs, 5 red LEDs, 2 x 18650 batteries, a battery charger module and a cycle timer relay switch. The opening for the buttons and screen of the timer was left out as it's meant to be set once and then forgotten, allowing easy changes by simply removing the box. The box slides into two mounts easily, one which can be screwed onto a wall and another that can be hooked with cables/rope. A convenient feature is the ability to take off the box for recharging or servicing without any hassle. The opening at the top cover allows for easy access to the charge module and LEDs. The LEDs transfer the charge indication lights, with the LED.stl being transparent. Parts used: * 5 x 5mm blue LEDs * 5 x 5mm red LEDs * 2 x 18650 li-ion batteries * 1 x on/off switch * 1 x charger module TP4056 (the version allowing simultaneous charging and use) * 1 x Kkmoon LED Indicator Automation Digital Delay Timer * 5 x 56ohm resistors (assuming blue LEDs are around 3.3v, a common voltage) * 5 x 100ohm resistors (assuming red LEDs are around 2-2.2v, a common voltage) * Cables The on/off switch is not specified by make, but the opening in the design is L:19mm H:14mm, a standard size that should be easily obtainable. For the batteries, I used this thing: https://www.thingiverse.com/thing:2339441 In my build, the batteries are soldered to the charger module, with the outs connected to the timer module. The on/off switch is located in front of the timer, and all LEDs are connected to the relay switch of the timer. 100ohm resistors are soldered to the red LEDs, while 56ohm resistors are soldered to the blue LEDs. All LEDs are wired in parallel. It's essential to check your LED specs or calculate the required resistance for optimal performance. The batteries are connected in parallel to double their capacity while maintaining the voltage. Adding more batteries can extend the time between charges if desired.