Wasca

hitomi2500·wasca·board/wasca.kicad_pcb

About the Wasca PCB

Wasca is an open source RP2040/RP2350 PCB design by hitomi2500, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 77.4 mm, with 124 components from 38 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the SN74LVC1T45DBVR, P25Q16SH-SSH-IR, 74ALVC164245DGG:11-JSM, W9825G6KH-6 and SY8008CAAC. By type, the board carries 59 capacitors, 36 resistors, 17 ICs, 3 connectors, 3 diodes and 2 crystals.

It belongs with the retro computing designs in this gallery.

From the project

Sega Saturn multipurporse cartridge

- Backup memory cartridge - RAM expansion cartridge - ROM cartridge - Homebrew software compiled as a cartridge ROM

1. Prepare the SD card formatted as FAT32. Other filesystems like NTFS and exFAT are not supported. 2. Copy wasca.ss and wasca.rv to the SD card root directory. Note that the file names should be in lowercase on the card, check FAT32 LFN support or reformat the card if they are not. 3. Insert the SD card into wasca, plug wasca into the cartridge slot, power on the console 4. Verify that the front LED on the cartridge turns red, then blue. 5. wasca menu should appear on screen…

Main components on the Wasca

SN74LVC1T45DBVR P25Q16SH-SSH-IR 74ALVC164245DGG:11-JSM RP2040 W9825G6KH-6 SY8008CAAC XC6206P252MR LFE5U-25F-6BG256I

Wasca bill of materials (BOM)

124 components, 38 distinct parts.

Qty	Part	Footprint	Refs
5	SN74LVC1T45DBVR	SOT-23-6	U1, U2, U4, U5, U6
2	P25Q16SH-SSH-IR	SOIC-8_5.3x5.3mm_P1.27mm	U3, U17
3	74ALVC164245DGG:11-JSM	TSSOP-48_6.1x12.5mm_P0.5mm	U7, U8, U10
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U9
2	W9825G6KH-6	TSOP-II-54_22.2x10.16mm_P0.8mm	U11, U12
2	SY8008CAAC	SOT23-5_SY8008B_SGY	U13, U14
1	XC6206P252MR	SOT-23-3	U15
1	LFE5U-25F-6BG256I	caBGA256_LAT	U16
1	X322512MSB4SI	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	SX2M25.000M20F30TNN	Oscillator_SMD_SeikoEpson_SG210-4Pin_2.5x2.0mm_HandSoldering	Y2
1	UC09-0B16F00P11	DX07S016JA1R1500	CN1
1	SD-CARD 11P	693063020911	CN4
1	2.54-1*8P母环保	MODULE_ESP32-CAM-HALF	CN5
2	TS-1101-C-W	SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS	SW1, SW2
1	BAT54C	SOT-23	D1
1	LED_BKGR	LED_D5.0mm-4_RGB	D3
1	LED	LED_0805	D4
2	2.2uH	L_1008_2520Metric	L1, L2
34	0.1uF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1, C2, C4, C5, C7, C9, C10, C11 +26
4	4.7uF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C3, C6, C8, C29

Show 18 more

Qty	Part	Footprint	Refs
2	15pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C12, C13
2	22uF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C30, C31
2	1uF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C32, C41
2	18pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C42, C43
2	10uF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C44, C45
11	0.1uF	C_0402_1005Metric	C49, C50, C51, C52, C53, C54, C55, C56 +3
2	5.1K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1, R4
3	1K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R19, R20
6	0	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R3, R7, R8, R16, R17, R28
2	27	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R5, R6
1	680K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R9
1	200K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R10
3	470	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R11, R14, R15
1	150K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R12
1	240K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R13
2	4K7	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R18, R35
9	10K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R21, R22, R29, R30, R31, R32, R33, R34 +1
5	33K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R23, R24, R25, R26, R27

Wasca design files

The KiCad project lives in the hitomi2500/wasca repository on GitHub; these links point at the commit this page was built from.

Layoutboard/wasca.kicad_pcb
Schematicboard/wasca.kicad_sch

Wasca: common questions

What microcontroller does the Wasca use?

The Wasca is built around the RP2040, from the RP2040/RP2350 family.

How big is the Wasca PCB?

The Wasca measures 100 × 77.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Wasca?

124 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Wasca design files?

From the hitomi2500/wasca repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Wasca design in my own project?

Yes, under the terms of its MIT license, which hitomi2500 chose for the repository.

Can I test firmware for the Wasca without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.