2 layers200 × 170 mm
Routing R1
ddasdkimo/rack-atx-controller
10-host isolated ATX rack controller hardware planning, interactive 3D model and wiring documentation
698 parts
2 layers71.5 × 33 mm
CEI TOOL
radiostart/CEI-TOOL- Size
- 71.5 × 33 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 55
- Pads
- 236
- Tracks, vias
- 516, 164
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Feb 2026
- Updated
- 16 Mar 2026
Overview
CEI TOOL is an open-source printed circuit board by radiostart, from the radiostart/CEI-TOOL repository on GitHub. It is a 2-layer board of 71.5 × 33 mm with 62 parts on 55 nets, routed with 516 tracks and 164 vias.
It is built around the ESP32-C3-MINI-1, USBLC6-2SC6 and XC6220B331PR-G, with the KMR211NGLFS, 0603L100SLYR and LTST-S270KRKT among its other parts. Its parts include 22 resistors, 14 capacitors, 5 connectors, 4 ICs and 3 diodes. It belongs with the ESP32 and RISC-V boards of this library.
Main components
11ESP32-C3-MINI-1
--40℃~+81℃ -89dBm 2.4GHz 350mA 3V~3.6V 82mA ESP32-C3 Chip On-board PCB Antenna UART - WiFi Modules ROHSRF CrazyWiFi Modules
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
XC6220B331PR-G
SOT-89-5-40℃~+85℃@(Ta) 1 118.75uA 1A 3.3V 50dB@(1kHz) 655mV@(1000mA) 6V Fixed Over Current Protection、Thermal Shutdown Positive SOT-89-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
KMR211NGLFS
SMD-40℃~+85℃ 1.2N 1.9mm 2.8mm 32V 4.6mm 50mA Gull Wing Round Button SPST-NO Surface Mount,Vertical SMD Tactile Switches ROHSC&KTactile Switches
0603L100SLYR
0603-40℃~+85℃ 1.8A 120mΩ 1A 300ms 40mΩ 50A 600mW 6V 0603 Resettable Fuses ROHSLittelfuseResettable Fuses
LTST-S270KRKT
SMD,1.6x1.2mm-30℃~+85℃ 130° 20mA 2V 54mcd 631nm 639nm 75mW Discrete Diode Red Side View Mount Water Clear SMD,1.6x1.2mm LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
PESD5V0S2BT
SOT-2312A 130W@8/20us 14V 2 35pF 5.5V 5V 5nA Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 SOT-23 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
SM02B-SRSS-TB(LF)(SN)(P)
-UncategorisedJST
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
SMF5.0A
SOD-123FLESD And Surge Protection (TVS/ESD)hongjiacheng
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
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10µF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C10 |
| 6 | TestPoint_Pad_D1.5mm | TestPoint:TestPoint_Pad_D1.5mm | 3.3v, BAT, EN, EN, GND, GND |
| 5 | 10kΩ | Resistor_SMD:R_0603_1608Metric | R3, R9, R11, R13, R22 |
| 5 | 47kΩ | Resistor_SMD:R_0603_1608Metric | R1, R2, R16, R17, R20 |
| 4 | 22Ω | Resistor_SMD:R_0603_1608Metric | R12, R14, R18, R19 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad | H1, H2, H3, H4 |
| 3 | 2.2kΩ | Resistor_SMD:R_0603_1608Metric | R8, R10, R21 |
| 2 | 0.1µF | Capacitor_SMD:C_0603_1608Metric | C7, C12 |
| 2 | 1µF | Capacitor_SMD:C_0603_1608Metric | C8, C13 |
| 2 | 5.1kΩ | Resistor_SMD:R_0603_1608Metric | R4, R6 |
| 2 | KMR211NGLFS | KMR211NGLFS:SW_KMR211NGLFS | S1, S3 |
| 1 | 0.01µF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 0.47µF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 0603L100SLYR | 0603L100SLYR:FUSC1608X100N | F1 |
| 1 | 1.8kΩ | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 1kΩ | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | 22µF | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 3.3kΩ | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 532610271 | 532610271:MOLEX_532610271 | J5 |
| 1 | 532610871 | 532610871:MOLEX_532610871 | J2 |
| 1 | BQ24075RGTT | BQ24075RGTT:QFN50P300X300X100-17N | U3 |
| 1 | ESP32-C3-MINI-1 | PCM_Espressif:ESP32-C3-MINI-1 | U1 |
| 1 | LTST-S270KRKT | LTST-S270KRKT:0603 | D3 |
| 1 | PESD5V0S2BT | PESD5V0S2BT:SOT23 | D2 |
| 1 | SM02B-SRSS-TB_LF__SN_ | SM02B-SRSS-TB_LF__SN_:SM02B-SRSS-TB_LF__SN_ | J6 |
| 1 | SM04B-SRSS-TB | SM04B-SRSS-TB:CONN_SM04B-SRSS-TB_JST | J4 |
| 1 | SMF5.0A | SMF5.0A:P37_SOD-123FL | D4 |
| 1 | TYPE-C-31-M-12 | TYPE-C-31-M-12:HRO_TYPE-C-31-M-12 | J1 |
| 1 | USBLC6-2SC6 | USBLC6-2SC6:SOT95P280X145-6N | U4 |
| 1 | XC6220B331PR-G | XC6220B331PR-G:SOT-89-5_TOR | U2 |
The 61 most common of 62 parts.
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Questions
How big is the CEI TOOL PCB?
It measures 71.5 × 33 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CEI TOOL use?
62 parts, built around the ESP32-C3-MINI-1, USBLC6-2SC6, XC6220B331PR-G and KMR211NGLFS. 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 CEI TOOL KiCad files?
From the radiostart/CEI-TOOL repository on GitHub, at the commit this page was made from: the board is CEI-TOOL.kicad_pcb and its schematic CEI-TOOL.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CEI TOOL design in my own project?
Its repository states no licence, so its author keeps all rights: ask radiostart before reusing the design.