2 layers60 × 100 mm
TaschenOper
davedarko/TaschenOper
A handheld inspired by adafruits numpad and certain pocket music devices
127 partsMIT
2 layers60 × 100 mm
LoKiPAD
davedarko/LoKiPAD12a low cost adafruit macropad clone with integrated todbot MacroPadSynthPlug
- Size
- 60 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 69
- Nets
- 61
- Pads
- 246
- Tracks, vias
- 423, 93
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Feb 2023
- Updated
- 14 Apr 2023
Overview
LoKiPAD is an open-source printed circuit board by davedarko, from the davedarko/LoKiPAD repository on GitHub. It is a 2-layer board of 60 × 100 mm with 69 parts on 61 nets, routed with 423 tracks and 93 vias.
It is built around the H11L1 and WS2812B. Its parts include 15 capacitors, 14 diodes, 14 switches, 10 resistors and 4 connectors. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
2README
README.mdLoKiPAD
A low cost adafruit macropad clone with integrated todbot MacroPadSynthPlug! Partslist is kept minimal and some things like the SD-card adapter, debug LED and speaker were dropped. Generic 12mm SMD buttons, 3535 WS2812B LEDs, an OLED module and a Raspberry PI Pico keep the price low. Check the ibom file for more info on the resistor and capacitor values. There's a small hack necessary so you don't have to remove the PCB from the case to push the BOOTSEL button - connect the pad with a jumper wire to a pin of the pico bootsel button.
Code
Chose the Adafruit MacroPad RP2040 to compile the Arduino examples from todbot, so the SPI pins for the display are setup correctly. You also have to (re)define some pins to make the oled display and the LEDs work. There might be an issue with the encoder - if it feels backwards, just swap the PIN_ROTA and PIN_ROTB definition.
Since this is hardware to run todbots code, there's no code of my own to find here.
#define PIN_NEOPIXEL 19
#define PIN_ROTA 18
#define PIN_ROTB 17
#define OLED_DC 14
#define OLED_RST 15
#define OLED_CS 22code of other people
This MIDI controller code by @codeandmake works great too, once you've changed the pin definition.
Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14 |
| 12 | SW_Push | davedarko:SW_PUSH-12mm-SMD | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12 |
| 12 | WS2812B | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13 |
| 5 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R7, R8, R9, R10 |
| 3 | 220 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R4 |
| 2 | 1N4148 | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D14 |
| 2 | AudioJack4 | davedarko:Jack_3.5mm_PJ320D_Horizontal | J1, J3 |
| 2 | Val** | davedarko:davedarko_logo_silk_outline | Ref**, Ref** |
| 1 | 1.8k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 47uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C15 |
| 1 | BOOTSEL | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | Conn_01x04_Socket | Connector_JST:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | J4 |
| 1 | Conn_01x07_Female | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J2 |
| 1 | G*** | kibuzzard-63E7EF8E | kibuzzard-63E7EF8E |
| 1 | G*** | kibuzzard-63D6CFE9 | kibuzzard-63D6CFE9 |
| 1 | G*** | kibuzzard-63D67711 | kibuzzard-63D67711 |
| 1 | G*** | kibuzzard-63D67702 | kibuzzard-63D67702 |
| 1 | G*** | kibuzzard-63D676B5 | kibuzzard-63D676B5 |
| 1 | H11L1 | Package_DIP:DIP-6_W8.89mm_SMDSocket_LongPads | U2 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | NEOPIXEL_OUT | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | Pico | davedarko:RPi_Pico_SMD | U1 |
| 1 | Rotary_Encoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW13 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW14 |
Questions
How big is the LoKiPAD PCB?
It measures 60 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LoKiPAD use?
69 parts, built around the H11L1 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 LoKiPAD KiCad files?
From the davedarko/LoKiPAD repository on GitHub, at the commit this page was made from: the board is KiCad/LoKiPAD.kicad_pcb and its schematic KiCad/LoKiPAD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LoKiPAD design in my own project?
Its repository states no licence, so its author keeps all rights: ask davedarko before reusing the design.
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