2 layers100 × 35 mm
Control board
Quard/MLight
MLight is a compact, all-in-one control board designed to manage auxiliary tools for soldering equipment
63 parts1MIT
2 layers
Ring light
Quard/MLight1MLight is a compact, all-in-one control board designed to manage auxiliary tools for soldering equipment
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 18
- Pads
- 44
- Tracks, vias
- 60, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 9 Oct 2024
- Updated
- 9 Oct 2024
Overview
Ring light is an open-source printed circuit board by Quard, from the Quard/MLight repository on GitHub, published under the MIT licence. It is a 2-layer board with 23 parts on 18 nets, routed with 60 tracks and 0 vias.
Its parts include 16 diodes, 4 resistors and 1 connector. It belongs with the STM32 boards of this library.
README
README.mdMLight
MLight is a compact, all-in-one control board designed to manage auxiliary tools for soldering equipment. It was primarily developed for an affordable Chinese digital microscope, aiming to reduce the number of power cords and to integrate lighting for the microscope. Additionally, it can control the fan of a basic DIY fume extractor, built using a PC fan and an aquarium coal filter, and provide power to a small external HDMI display for the microscope.
Features of the Control Board:
- Capable of being powered by an external DC 12V source or a QuickChange USB source.
- Bypasses power to the microscope only when the voltage is at 12V.
- Custom ring light with PWM (Pulse Width Modulation) brightness control.
- The PWM for the light is configurable at frequencies of 1 kHz, 4 kHz, 8 kHz, or 16 kHz to prevent image distortion from the microscope.
- Provides a 12V output for PC fan with PWM speed control support for the DIY fume extractor.
- Features a USB output of 1.5A for powering an external HDMI display.
- Includes an OLED display and encoder for easy control.
- Equipped with external EEPROM memory for storing and restoring settings.
A brief demonstration video of the system in operation.
Controls
| Action | Description |
|---|---|
| Encoder short press | Switch between fan and light |
| Encoder rotate | Change the value of current selected element |
| Encoder long press | Disable/enable fan and light |
| Encoder rotate pressed | Change the light PWM frequency |
Project parts
Firmware
The firmware folder includes an STM32CubeIDE CMake project, with all source code developed using CMSIS.
Control Board
The KiCad project is located in the hardware/control_board directory. It includes a BOM file in the project root and an interactive BOM (iBOM) in the bom folder to facilitate assembly.
Ring Light
The same structure applies to the Ring Light project, with its root located in the hardware/ring_light directory. It also contains a BOM file in the project root and an interactive BOM (iBOM) in the bom folder to assist with assembly.
3d
The 3d folder contains STL files and Fusion 360 source files for the brackets used to mount the control board and ring light onto a microscope stand.
Display elements
Components block diagram
BOM
Control Board
| Reference | Value | Qty | Manufacturer Part Number | LCSC | MOUSER |
|---|---|---|---|---|---|
| C1,C4,C10 | 100nF | 3 | CL10B104KB8NNNC | C1591 | 187-CL10B104KB8NNNC |
| C2 | 4.7uF | 1 | CL21A475KAQNNNE | C1779 | 187-CL21A475KAQNNNE |
| C3,C7,C8 | 10uF | 3 | CL21A106KOQNNNE | C1713 | 187-CL21A106KOQNNNE |
| C5,C6,C9 | 10nF | 3 | CL10B103JB8NNNC | C7248 | 187-CL10B103JB8NNNC |
| C11,C12 | 22uF | 2 | CL31A226KAHNNNE | C12891 | 187-CL31A226KAHNNNE |
| D1,D2 | B340 | 2 | B340A-13-F | C85098 | 621-B340A-F |
| D3 | LED | 1 | 150060BS75000 | C84266 | 710-150060BS75000 |
| D4 | LED | 1 | 150060RS75000 | C84263 | 710-150060RS75000 |
| IC1 | FZT1049ATA | 1 | FZT1049ATA | C73835 | 522-FZT1049ATA |
| J1 | USB_A_Stacked | 1 | 67298-4090 | C908455 | 538-67298-4090 |
| J3 | Light | 1 | C158012 | ||
| J4 | Fan | 1 | 47053-3000 | C19795120 | 538-47053-3000 |
| J5 | OLED SSD1306 | 1 | |||
| J7 | USB_C_Receptacle_USB2.0 | 1 | GSB1C211110DS1HR | C709357 | 523-GSB1C211110DS1HR |
| J8 | Barrel_Jack | 1 | KLDHCX-0202-BP-LT | C720558 | 806-KLDHCX0202BPLT |
| J9 | Conn_01x02 | 1 | C158012 | ||
| L1 | 4.7uH | 1 | IHLP2525CZER4R7M01 | C553961 | 70-IHLP2525CZER4R7M1 |
| Q1 | AO3400A | 1 | AO3400A | C20917 | 942-IRLML6344TRPBF |
| R1,R2,R3,R4,R5,R6,R8,R10,R15 | 10k | 9 | RC0603FR-0710KL | C98220 | 603-RC0603FR-0710KL |
| R7 | 180k | 1 | RC0603FR-07180KL | C123419 | 603-RC0603FR-07180KL |
| R9,R11 | 2.2k | 2 | RC0603FR-072K2L | C114662 | 603-RC0603FR-072K2L |
| R12 | 33k | 1 | RC0603FR-0733KL | C126359 | 603-RC0603FR-0733KL |
| R13,R16 | 1k | 2 | RC0603FR-071KL | C22548 | 603-RC0603FR-071KL |
| R14 | 1.8k | 1 | RC0603FR-071K8L | C185354 | 603-RC0603FR-071K8L |
| SW4 | RotaryEncoder_Switch | 1 | C18164805 | 652-PEC12R-4220F-S24 | PEC12R-4220F-S0024 |
| U1 | STM32G030F6Px | 1 | STM32G030F6P6TR | C529330 | 511-STM32G030F6P6TR |
| U2 | AP63205WU | 1 | AP63205WU-7 | C2071056 | 621-AP63205WU-7 |
| U3 | M24C02-WMN | 1 | M24C02-RMN6TP | C83836 | 511-M24C02-RMN6TP |
| U4 | NCP1117-3.3_SOT223 | 1 | NCP1117ST33T3G | C26537 | 863-NCP1117ST33T3G |
Ring Light
| Reference | Value | Qty | Manufacturer Part Number | LCSC | MOUSER |
|---|---|---|---|---|---|
| D1,D2,D3,D4,D5,D6,D7,D8,D9,D10,D11,D12,D13,D14,D15,D16 | LED | 16 | JE2835AWT-R-H40EA0000-N0000001 | C5220767 | 941-JE2835AWTH40EAN |
| R1,R2,R3,R4 | 0 | 4 | RC0603JR-070RL | C95177 | 603-RC0603JR-070RL |
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | LED | LED_SMD:LED_PLCC_2835 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 4 | 0 | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
Questions
What parts does the Ring light use?
23 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Ring light KiCad files?
From the Quard/MLight repository on GitHub, at the commit this page was made from: the board is hardware/ring_light/ring_light.kicad_pcb and its schematic hardware/control_board/control_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ring light design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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