LED fill light

 
I. Product Introduction This is a multi-functional LED fill light. The LED light board features one WS2812 RGB color LED with 16 LED beads, allowing for color adjustment for different scenarios; one warm light LED with a 10-series-2-parallel configuration; and one cool light LED with 38V COB beads. The control board has two boost LED current drivers and three buttons for switching light modes and adjusting LED height.
II. Board Functions 1. Powered by a single 3.7V 1000mA lithium battery. 2. Two WS2812 LED bead interfaces for RGB color illumination, with adjustable color and brightness. 3. One warm light LED dimming driver for warm light fill light and general illumination, using a 10-series-2-parallel configuration, estimated at 40V, 200mA. 4. One cold-light LED dimming driver for cold-light supplementary lighting and general illumination, using a single COB LED, 38V, 200mA. 5. Features a push-button switch for mode switching, UP and DOWN buttons for brightness adjustment. 6. The board is designed for a 5W receiving circuit, enabling wireless charging of the lithium battery. Currently, the project uses a Type-C wired charging method. 7.
The main control board of the board uses an ESP32 chip for control, and can be expanded to support WLED control mode.
III. Effect diagram of LED board + control board:
1. 3D view and physical image of the front of the LED board PCB (Note that my circuit uses 40V COB LEDs, which is the one used in the physical product. Single LEDs cannot be used in this project; the control circuit needs to be changed to a single LED step-down driver).
2. 3D view and physical image of the LED control board PCB .
4. 3D photo of the casing (casing size is 65mm*65mm*65mm) .
4. Physical photo
. IV. Circuit description and usage introduction: 1. This project consists of an LED board + LED control board. The LED board is made of aluminum substrate for easy heat dissipation of the LEDs. The board has 16 5050 WS2812 LEDs; one 40V, 200mA COB LED for cool light; and 10 series 2 parallel warm white 2835 LEDs, totaling 20.
2. Two WS2812 interfaces, using XH2.5 connectors. These are directly plugged into the control board. Currently, only one channel is needed on the LED light board, with 16 LEDs. This allows for different colors, brightness levels, or ambient lighting effects.
3. The project uses the SY7301 chip for both warm and cool light. This chip is an LED current driver chip. The SY7301A features a boost DC/DC converter to provide precise, constant current to drive the LEDs. Operating at a fixed switching frequency of 1MHz, it allows the use of small-value external ceramic capacitors and inductors. The series-connected LEDs are driven by a regulated current set by an external resistor. The SY7301A is ideal for driving up to 10 white LEDs in series or up to 40V.
Therefore, two channels are provided for warm and cool light control circuits, enabling switching between warm and cool light and brightness adjustment.
 
4. Single-cell lithium battery power supply, using SGM40560 charging IC, battery capacity is 1000mA, currently using Type-C charging (the circuit also reserves a wireless charging RX solution, which can be changed to wireless charging in later versions). A
SY7069 single-cell lithium battery boost IC is used to power the WS2812, providing power for both cool and warm light.
5. The board's switch circuit: when the switch is pressed, IO4 detects the button action. Hardware-wise, the p-MOS conducts, and after the MCU powers on, it pulls IO19 high, forming a self-locking mechanism.
 
6. 3D shell design: (The shape includes a lens, specifications are as follows.)
7. The lamp's top cover uses an acrylic cover plate, also printed by JLCPCB. Below are the acrylic printing specifications. Additionally, the PCB project file also contains the printed pattern, all open-source on the project platform. (The right side shows a color screen to be added later, a requirement for upgrades; updates are available. The color screen will display color, battery level, etc.)
 
 
V. Product test video.