This is a PCB badge for the 2019 edition of pixels camp. The project consists on a 39x9 (351) LED matrix display driven by the IS31FL3741 IC and controlled by an ESP32, making it wifi-connected. The board can be powered by usb and/or a 1s lipo battery (charges with usb).
The main goal is to make a web connected scrolling text display, although anyone can develop a custom version of the firmware.
PCBWay was kind enough to supply the V2.1 Pcbs and stencils.
IssI has been a great supporter due to it's technical support and the supplied some samples of the driver IC and the corresponding devboard.
I thank both of the sponsors for making the new version possible!
- New version in development
- Waiting for the new PCBs and components to arrive
- Waiting for the new version
- Assemble new board
All Schematics can be found in the PDF folder of the PCB Project
Power is supplied by usb and/or 1s lipo, with usb charging capabilities.
The circuit can be powered by usb and/or 1s lipo. T1 is disabled when usb is present and vice-versa. There is also a main power switch that toggles T2. An LTSpice simulation is present in the Simulations folder.
Used ICs:
The microcontroller used is the ESP32 with WIFI and bluetooth built-in. The LED matrix is driven by the IS31FL3741 IC. The usb to serial conversion in handled by the CH340G (with auto-reset DTR capabilities).
Used ICs:
The PCBs was designed in Altium Designer and the most recent GERBERs and schematics are available in their respective repo folders. The Badge consists of 2 stackable PCBs, one for the matrix and one for the power and logic. Each PCB is 126x36mm and there is a panel PCB with both of the PCBs held by cuttable tabs. The panel is 140x91mm.
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