2 layers191.5 × 76 mm
Pcb project
CrashOverride85/zc95
4 channel EStim box inspired by the mk312bt, with Lua scripting support
337 parts117GPL-3.0
4 layers44.8 × 76 mm
Tiny scarab
Embeetle/tiny-scarab24Tiny beetle board based on the CH32V003 10-cent chip.
- Size
- 44.8 × 76 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 147
- Nets
- 69
- Pads
- 396
- Tracks, vias
- 1,694, 228
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Nov 2023
- Updated
- 30 Apr 2025
Overview
Tiny scarab is an open-source printed circuit board by Embeetle, from the Embeetle/tiny-scarab repository on GitHub, published under the MIT licence. It is a 4-layer board of 44.8 × 76 mm with 147 parts on 69 nets, routed with 1,694 tracks and 228 vias.
It is built around the CH32V003F4P6, CH32V305FBP6 and LESD8LH5.0CT5G, with the CL21A106KAYNNNE, 0402CG220J500NT and K2-1109SP-A4SA-04 among its other parts. Its parts include 43 capacitors, 27 resistors, 8 connectors, 7 diodes and 6 transistors. It belongs with the RISC-V boards of this library.
Main components
12
CH32V003F4P6
TSSOP-20-175milTSSOP-20-175mil Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)CH32V305FBP6
TSSOP-20-175milTSSOP-20-175mil Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
LESD8LH5.0CT5G
SOD-88211.5V 1uA 2.7pF 3.5A@8/20us 40W@8/20us 5.5V 5V Bidirectional IEC 61000-4-2 TVS SOD-882 ESD and Surge Protection (TVS/ESD) ROHSLeshan Radio (LRC)ESD And Surge Protection (TVS/ESD)
CL21A106KAYNNNE
080510uF 25V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
0402CG220J500NT
040222pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
K2-1109SP-A4SA-04
SMD-4P,4.5x4.5mm-25℃~+85℃ 100,000 cycles 12V 2.5N 3.8mm 4.5mm 4.5mm 50mA Round Button SPST Surface Mount,Vertical SMD-4P,4.5x4.5mm Tactile Switches ROHSHRO ElectronicsTactile Switches
DMG1012UW-7-VB
SC-70-3SC-70-3 MOSFETs ROHSVBsemi ElecMOSFETs
DMP1045U-7(ES)
SOT-23MOSFETsElecSuper
RLSD32A051LC
SOD-3231 1pF 1uA 20A@8/20us 300W@8/20us 5V 6V 9.8V Bidirectional ESD IEC 61000-4-2 SOD-323 ESD and Surge Protection (TVS/ESD) ROHSRUILONESD And Surge Protection (TVS/ESD)
2.54-2*7P针立贴
SMD,P=2.54mm-55℃~+105℃ 14P 2 2.54mm 2.54mm 2.5mm 3A 3mm 6mm Black Brass Gold Pin Header Surface Mount,Vertical SMD,P=2.54mm Pin Headers ROHSBOOMELEPin Headers
SX5B12.000F2020F30
SMD5032-4P-40℃~+85℃ 12MHz 20pF 80Ω Crystal Oscillator ±20ppm ±30ppm SMD5032-4P Crystals ROHSShenzhen SCTF ElecCrystals
SS-3235D-03-L3
SMD,9x3.6mm-40℃~+85℃ 10000 times 12V 3.5mm 3.6mm 50mA 9mm Black DP3T Rectangular Columnar SMD(SMT) Tab Surface Mount, Right Angle SMD,9x3.6mm Slide Switches ROHSXKB ConnectionSlide Switches
README
README.mdTiny Scarab
The Tiny Scarab is an open-source development board built around the popular 10 cent CH32V003F4P6 RISC-V microcontroller from WCH. Using this dev board is uncomplicated: just plug it into your computer with a USB-C cable, and you're ready to code - the flasher/debugger is already embedded in the board for your convenience. Now you might wonder - why yet another dev board? Aren't there thousands already?
Well - this dev board is presented to you with a new coding IDE. Not satisfied with the current offering of IDEs for microcontrollers, we created a brand new one from scratch: Embeetle IDE. With the Tiny Scarab and Embeetle IDE, you'll discover how smooth programming a microcontroller can be.
This open-source dev board is developed in collaboration with the
DevHeads community. Please join the DevHeads Discord channel if you want to know more about this Tiny Scarab board, Embeetle IDE or any other topic related to hardware and embedded software. We're waiting for you on the server!
Overview
The Tiny Scarab is based on the 10-cent RISC-V CH32V003F4P6 MCU from WCH:
The Tiny Scarab board merges the WCH-LinkE-R0-1v3 flash/debug probe and the CH32V003F4P6-EVT-R0-1v1 board into a single development board:
There's no need to wire up anything. Just plug the Tiny Scarab's USB-C port in your computer, fire up Embeetle IDE and start coding!
Index
-
Hardware
-
Software
NOTES FOR MYSELF
Improvement points:
- Bulges in encasing don't fit board. (fixed)
- Tag Connect needs a recess in the enclosure. (fixed)
- Light bleeds between lightpipes. Lightpipes and LEDs too expensive. (fixed)
- Graphical membrane needs 1.2mm edge. (fixed)
- 3/5V indication on board is wrong. On graphical membrane it's correct. (fixed)
Parts
147| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 5V | Tiny_Scarab:D_SOD-882_SP1007-01ETG | TVS10, TVS11, TVS12, TVS13, TVS14, TVS15, TVS16, TVS17, TVS18, TVS19, TVS20, TVS21, TVS22, TVS23, TVS24, TVS25 +16 |
| 24 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C2, C10, C15, C16, C17, C23, C24, C25, C26, C27, C30, C31, C37, C38, C39 +8 |
| 9 | 10u | Capacitor_SMD:C_0805_2012Metric | C3, C20, C21, C22, C32, C33, C34, C35, C36 |
| 7 | TestPoint | Tiny_Scarab:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7 |
| 4 | 100k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R13, R24, R25, R30 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C11, C13, C14, C18 |
| 4 | 220 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R7, R8, R9, R10 |
| 4 | 22p | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C28, C29, C42, C43 |
| 4 | 3mm | Tiny_Scarab:Screw_Hole | J5, J6, J7, J8 |
| 3 | 0 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R21, R22, R23 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R19, R20, R27 |
| 3 | 12V 50mA | Tiny_Scarab:SW_Tactile_SPST_NO_Straight_Korean-Hroparts_K2-1109SP-A4SA-04 | SW1, SW2, SW3 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R12, R18, R28 |
| 3 | DMG1012UW-7 | Tiny_Scarab:SOT-323_SC-70 | Q1, Q2, Q6 |
| 3 | DMP1045U-7 | Tiny_Scarab:SOT-23_DMP1045U-7 | Q3, Q4, Q5 |
| 2 | 100 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6, R11 |
| 2 | 10u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C12, C19 |
| 2 | 210 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R29 |
| 2 | 33 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14, R16 |
| 2 | 5V | Tiny_Scarab:D_SOD-323_CDSOD323-T05LC | TVS1, TVS2 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4, R5 |
| 2 | BLUE | Tiny_Scarab:LED_D3.0mm_blue | LED3, LED4 |
| 2 | CONN_PIN_HEADER_02x07 | Tiny_Scarab:CONN_PIN_HEADER_2x07_P2.54mm_Vertical_SMD | J3, J4 |
| 2 | GREEN | Tiny_Scarab:LED_D3.0mm_green | LED1, LED5 |
| 1 | 12MHz | Tiny_Scarab:CRYSTAL-SMD5032-4P | XTAL1 |
| 1 | 12V 50mA | Tiny_Scarab:SW_Slide_SPDT_XKB-Connectivity_SS-3235D-03-L3 | SW4 |
| 1 | 12V 50mA | Tiny_Scarab:SW_Tactile_SPST_NO_Straight_Korean-Hroparts_K2-1109SP-I4SA-04 | SW5 |
| 1 | 24MHz | Tiny_Scarab:CRYSTAL-SMD3225-4P | XTAL2 |
| 1 | 2A | Tiny_Scarab:Fuse_MFU0603FF02000P500 | F1 |
| 1 | 330 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1 |
| 1 | 3V3 | Tiny_Scarab:SOT-223-3_TabPin2 | U2 |
| 1 | 40V 350mA | Tiny_Scarab:D_SOD-323 | D2 |
| 1 | 470 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R26 |
| 1 | 5V | Tiny_Scarab:D_SMA_SMAJ5.0A | TVS3 |
| 1 | 5V6 | Tiny_Scarab:D_SMA_1SMA4734A | D1 |
| 1 | AP2141WG-7 | Tiny_Scarab:SOT-23-5 | U1 |
| 1 | CH32V003F4P6 | Tiny_Scarab:TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | CH32V305FBP6 | Tiny_Scarab:TSSOP-20_4.4x6.5mm_P0.65mm | U3 |
| 1 | LOGO | LOGO | G*** |
| 1 | RED | Tiny_Scarab:LED_D3.0mm_red | LED2 |
| 1 | SolderJumper_2_Open | Tiny_Scarab:SOLDER_BRIDGE | JP1 |
| 1 | TC2050-IDC-NL | Tiny_Scarab:Tag-Connect_TC2050-IDC-NL_2x05_P1.27mm_Vertical_with_bottom_clip | J2 |
| 1 | USB_C_Receptable_USB2.0 | Tiny_Scarab:USB_C_Receptable_USB-TYPE-C-018 | J1 |
Questions
How big is the Tiny scarab PCB?
It measures 44.8 × 76 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Tiny scarab use?
147 parts, built around the CH32V003F4P6, CH32V305FBP6, LESD8LH5.0CT5G and CL21A106KAYNNNE. 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 Tiny scarab KiCad files?
From the Embeetle/tiny-scarab repository on GitHub, at the commit this page was made from: the board is tiny-scarab.kicad_pcb and its schematic Target-MCU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tiny scarab design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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