2 layers345.1 × 120.7 mm
2 layers79 × 117.5 mm
Mulpad
ekphi/mulpad- Size
- 79 × 117.5 mm
- Copper layers
- 2
- Parts
- 105
- Nets
- 82
- Pads
- 356
- Tracks, vias
- 497, 41
- Pours
- 356
- Routed
- Yes
- KiCad
- KiCad 6 (file 20220621)
- Created
- 17 Aug 2022
- Updated
- 17 Aug 2022
Overview
Mulpad is an open-source printed circuit board by ekphi, from the ekphi/mulpad repository on GitHub. It is a 2-layer board of 79 × 117.5 mm with 105 parts on 82 nets, routed with 497 tracks and 41 vias.
It is built around the ATMEGA32U4-MU, 1N4148W and MF-NSMF050-2, with the PRTR5V0U2X and TYPE-C-31-M-12 among its other parts. Its parts include 35 diodes, 31 resistors, 18 switches, 12 capacitors and 1 IC. It belongs with the keyboards and input and lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATMEGA32U4-MU
VQFN-44-EP(7x7)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
MF-NSMF050-2
1206-40℃~+85℃ 1.6mm 100A 13.2V 150mΩ 3.2mm 500mA 700mΩ 1206 Resettable Fuses ROHSBournsResettable Fuses
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
Parts
105| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D4, D10, D12, D13, D14, D15, D20, D21, D22, D23, D28, D29, D30, D31 +2 |
| 16 | 330 | Resistor_SMD:R_0603_1608Metric | R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31 |
| 16 | LED | LED_THT:LED_Rectangular_W3.0mm_H2.0mm | D5, D7, D9, D11, D16, D17, D18, D19, D24, D25, D26, D27, D32, D33, D34, D35 |
| 16 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16 |
| 10 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R3, R4, R5, R6, R7, R8, R9, R10, R11 |
| 4 | 0.01u | Capacitor_SMD:C_0603_1608Metric | C4, C5, C6, C7 |
| 4 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C9, C10, C11, C12 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R14, R15 |
| 2 | 22p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R12, R13 |
| 2 | EC11 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW17, SW18 |
| 1 | 16MHz_12pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | ATmega32U4-M | Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm | U1 |
| 1 | LOGO | LOGO | G*** |
| 1 | MF-NSMF050-2 | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | OLED_I2C_SSD1306 | Keyboard_Parts:OLED_I2C_SSD1306 | H1 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_TL3342 | RESET1 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
The 104 most common of 105 parts.
Questions
How big is the Mulpad PCB?
It measures 79 × 117.5 mm and has 2 copper layers.
What parts does the Mulpad use?
105 parts, built around the ATMEGA32U4-MU, 1N4148W, MF-NSMF050-2 and PRTR5V0U2X. 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 Mulpad KiCad files?
From the ekphi/mulpad repository on GitHub, at the commit this page was made from: the board is pcb/pcb.kicad_pcb and its schematic pcb/pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mulpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask ekphi before reusing the design.
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