armi0024/Koa-V2Koa V2 is an open-source printed circuit board by armi0024, from the armi0024/Koa-V2 repository on GitHub. It is a 2-layer board of 94 × 94 mm with 252 parts on 355 nets, routed with 2,659 tracks and 171 vias.
It is built around the RP2350B, AP2112K-3.3 and SN74LV1T34DBVR-TP. Its parts include 84 capacitors, 60 resistors, 52 connectors, 20 ICs and 20 switches. It belongs with the RP2350 boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | 100nF | KOA_FOOTPRINTS:C_0402_1005Metric | C1, C2, C3, C12, C13, C14, C15, C21, C22, C23, C24, C25, C26, C27, C28, C29 +40 |
| 16 | 10k | KOA_FOOTPRINTS:R_0402_1005Metric | R1, R9, R11, R15, R16, R24, R26, R30, R31, R39, R41, R45, R46, R54, R56, R60 |
| 12 | 1k | KOA_FOOTPRINTS:R_0402_1005Metric | R7, R10, R12, R22, R25, R27, R37, R40, R42, R52, R55, R57 |
| 12 | 4.7uF | KOA_FOOTPRINTS:C_0402_1005Metric | C16, C17, C18, C37, C38, C39, C58, C59, C60, C79, C80, C81 |
| 8 | 1uF | KOA_FOOTPRINTS:C_0402_1005Metric | C10, C11, C31, C32, C52, C53, C73, C74 |
| 8 | 22Ω | KOA_FOOTPRINTS:R_0402_1005Metric | R2, R3, R17, R18, R32, R33, R47, R48 |
| 8 | 33pF | KOA_FOOTPRINTS:C_0402_1005Metric | C19, C20, C40, C41, C61, C62, C82, C83 |
| 8 | 4.7k | KOA_FOOTPRINTS:R_0402_1005Metric | R13, R14, R28, R29, R43, R44, R58, R59 |
| 8 | 5.1kΩ | KOA_FOOTPRINTS:R_0402_1005Metric | R4, R6, R19, R21, R34, R36, R49, R51 |
| 8 | Conn_01x03 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J8, J13, J21, J26, J34, J39, J47, J52 |
| 8 | Conn_01x04 | Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J7, J11, J20, J24, J33, J37, J46, J50 |
| 8 | Conn_01x06 | Connector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J9, J12, J22, J25, J35, J38, J48, J51 |
| 8 | SW_Push | KOA_FOOTPRINTS:SW_SPST_TS-1088-xR020 | SW3, SW4, SW8, SW9, SW13, SW14, SW18, SW19 |
| 8 | SW_SPDT | KOA_FOOTPRINTS:MS-12C02-G015 | SW2, SW5, SW7, SW10, SW12, SW15, SW17, SW20 |
| 4 | 3.3uH | KOA_FOOTPRINTS:B201610S3R3 | L1, L2, L3, L4 |
| 4 | 330R | KOA_FOOTPRINTS:R_0402_1005Metric | R5, R20, R35, R50 |
| 4 | 33R | KOA_FOOTPRINTS:R_0402_1005Metric | R8, R23, R38, R53 |
| 4 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1, U6, U11, U16 |
| 4 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J6, J19, J32, J45 |
| 4 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J10, J23, J36, J49 |
| 4 | Conn_01x04 | KOA_FOOTPRINTS:AFC10-S04PCA-00 | J4, J17, J30, J43 |
| 4 | Conn_01x05 | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J5, J18, J31, J44 |
| 4 | Conn_02x10_Odd_Even | KOA_FOOTPRINTS:IDC-Header_2x10_P2.54mm_Vertical | J2, J15, J28, J41 |
| 4 | Fuse | KOA_FOOTPRINTS:MF-MSMF050-2 | F1, F2, F3, F4 |
| 4 | LED | KOA_FOOTPRINTS:LED_0603_1608Metric | D1, D2, D3, D4 |
| 4 | RP2350B | KOA_FOOTPRINTS:QFN-80_EP_10.573x10.573_Pitch0.4mm | U5, U10, U15, U20 |
| 4 | SN74LV1T34DBVR | KOA_FOOTPRINTS:DBV0005A_L | U3, U8, U13, U18 |
| 4 | Slide_Switch | KOA_FOOTPRINTS:Slide Switch | SW1, SW6, SW11, SW16 |
| 4 | USB A | KOA_FOOTPRINTS:USB A | J1, J14, J27, J40 |
| 4 | ~ | KOA_FOOTPRINTS:SOIC-8_5P28X5P28_WIN | U4, U9, U14, U19 |
| 4 | ~ | KOA_FOOTPRINTS:SOT-23-6 | U2, U7, U12, U17 |
| 4 | ~ | KOA_FOOTPRINTS:USB C | J3, J16, J29, J42 |
| 4 | ~ | KOA_FOOTPRINTS:ABM8-272-T3 | X1, X2, X3, X4 |
It measures 94 × 94 mm and has 2 copper layers, 1.6 mm thick.
252 parts, built around the RP2350B, AP2112K-3.3 and SN74LV1T34DBVR-TP. 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.
From the armi0024/Koa-V2 repository on GitHub, at the commit this page was made from: the board is KOA_V2.kicad_pcb and its schematic KOA_V2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask armi0024 before reusing the design.
tarinaroope/msx-pulse
A diagnostic cartridge for MSX computers. Very much a work in progress. This is at proof-of-concept stage. It boots, it reads the bus, it tells you things, but it's a long way from a finished product.
1vers1on/Mega
A microcontroller based on the RP2350B with a dedicated dac and adc, plus wifi and bluetooth.
gschuurman/android_vendor_gschuurman_vehicle_interfaces
vehicle interfaces for android automotive for a custom headunit
brenocq/bldc-motor
High-precision BLDC motor and controller development from scratch (in progress...)
YuuichiAkagawa/USBMIDItoSyncConverter
Converts USB MIDI clock messages to sync signals