2 layers38.1 × 38.9 mm
STM32 Keyboard
AeternusCo/STM32-Reference-Keyboard
This schematic has not been officially tested. It follows best practices and should work, but please confirm your design before placing a large order!
47 parts16Unlicense
2 layers71.4 × 138.1 mm
MgBoard
periodboards/MagnesiumA crappy 14 button macropad, 2 of which are rotary encoders
- Size
- 71.4 × 138.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 116
- Nets
- 118
- Pads
- 517
- Tracks, vias
- 1,409, 195
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 3 May 2022
- Updated
- 14 Jul 2022
Overview
MgBoard is an open-source printed circuit board by periodboards, from the periodboards/Magnesium repository on GitHub. It is a 2-layer board of 71.4 × 138.1 mm with 116 parts on 118 nets, routed with 1,409 tracks and 195 vias.
It is built around the 74HCT245PW, IS31FL3731-SALS2 and USBLC6-2SC6, with the WS2812B, DTC123JE and RB060MM-60TR among its other parts. Its parts include 37 diodes, 29 capacitors, 20 resistors, 15 switches and 5 ICs. It belongs with the keyboards and input boards and the STM32 boards of this library.
Main components
7
74HCT245PW
TSSOP-20-40℃~+125℃ 1 12ns@4.5V,50pF 160uA 4.5V~5.5V 6mA 6mA 74HCT 8 Bidirectional Tri-State TSSOP-20 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
IS31FL3731-SALS2
SSOP-28-208mil-40℃~+85℃ 18 2.7V~5.5V 3.2mA 400kHz Analog、PWM DC-DC Keyboard scanning SSOP-28-208mil LED Drivers ROHSISSILED Drivers
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
DTC123JE
SOT-523-55℃~+150℃ 1 NPN (Pre-Biased) 1.1V 100mA 150mW 2.2kΩ 250MHz 26 300mV 300mV 500mV@100uA,5V 50V 80 NPN SOT-523 Digital Transistors ROHSHXY MOSFETDigital Transistors
RB060MM-60TR
SOD-123F2A 30A 50uA@60V 60V 610mV@2A Independent SOD-123F Schottky Diodes ROHSROHM SemiconductorSchottky DiodesSMF9.0CA
SOD-123FLESD And Surge Protection (TVS/ESD)hongjiacheng
README
README.mdMagnesium
My crappy 14-key macropad that contains many mistakes in the design
Errors
RGB backlighting doesn't work
Somehow in the many days that I had worked on routing the backlighting, I never noticed that I used the wrong LED footprint and so the leds are on the wrong side of the board
The WS2812 was wired incorrectly
The power and ground were swapped on the WS2812, and therefore if you want to have underglow you need to use a bodge wire to connect data in to what was data out and rotate all of the LEDs accordingly
Parts
116| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C2, C3, C4, C11, C12, C14, C20, C21, C22, C23, C24, C25, C26, C27, C29 +2 |
| 15 | 1N4148 | Diode_SMD:D_SOD-123 | D2, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 |
| 12 | KEYSW | keyswitches:Kailh_socket_MX_optional_1u | K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, K12 |
| 12 | LED_RGBA | PeriodBoards:LED_RGBA_Reverse | D26, D27, D28, D29, D30, D31, D32, D33, D34, D35, D36, D37 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 |
| 8 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D18, D19, D20, D21, D22, D23, D24, D25 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C7, C15, C19, C28 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R12, R13, R15 |
| 3 | 20k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R18, R19, R20 |
| 3 | 4.7nF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C13, C16, C18 |
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO14580 | H1, H2, H3 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R9, R14 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R16, R17 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C5, C8 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R10, R11 |
| 2 | Rotary_Encoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_1u | SW1, SW2 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C10 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C17 |
| 1 | 74HCT245PW | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J2 |
| 1 | DTC123J | Package_TO_SOT_SMD:SOT-323_SC-70_Handsoldering | Q1 |
| 1 | IS31FL3731-SA | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U5 |
| 1 | Logo | PeriodBoards:Mg | L1 |
| 1 | MCP1700-3302E_SOT23 | Package_TO_SOT_SMD:SOT-23_Handsoldering | U3 |
| 1 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad | H4 |
| 1 | OLED_SCREEN_128x32 | PeriodBoards:OLED_SCREEN_128x32 | DS1 |
| 1 | PTC | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | RB060MM-60TR | Diode_SMD:D_SOD-123F | D3 |
| 1 | SMF9.0CA | Diode_SMD:D_SOD-123F | D1 |
| 1 | STM32F072CBUx | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U4 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_SKQG_WithStem | SW3 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
Similar boards
- 2 layers266.7 × 99.6 mm
Ortho66 Optical
MasterSpoon/Ortho66_Optical
Ortho 66 Optical PCB using KeyChron low profile optical switches
385 parts7 - 2 layers234.7 × 91.5 mm
Kawa
CoffeeBreakKeyboards/kawa
A 32 key 'fixed split' keyboard heavily inspired by the Reviung keyboards by gtips.
95 parts6 - 2 layers299.2 × 124 mm
- 2 layers285 × 95.1 mm
- 2 layers390 × 120.2 mm
- 2 layers89 × 124 mm
Hub20
joshajohnson/Hub20
Hub20 is a numpad with a bunch of features you never knew you needed.
183 parts68 - 2 layers389.5 × 155.3 mm
Questions
How big is the MgBoard PCB?
It measures 71.4 × 138.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MgBoard use?
116 parts, built around the 74HCT245PW, IS31FL3731-SALS2, USBLC6-2SC6 and WS2812B. 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 MgBoard KiCad files?
From the periodboards/Magnesium repository on GitHub, at the commit this page was made from: the board is MgBoard.kicad_pcb and its schematic AuxiliaryLEDs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MgBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask periodboards before reusing the design.