4 layers36.8 × 24.1 mm
4 layers42.3 × 47 mm
Anachron
KavEn06/AnachronDigital Pocketwatch
- Size
- 42.3 × 47 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 71
- Pads
- 290
- Tracks, vias
- 484, 194
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 Sep 2026
- Updated
- 7 Nov 2026
Overview
Anachron is an open-source printed circuit board by KavEn06, from the KavEn06/Anachron repository on GitHub. It is a 4-layer board of 42.3 × 47 mm with 67 parts on 71 nets, routed with 484 tracks and 194 vias.
It is built around the AP2112K-3.3TRG1, BMI270 and MCP73831T-2ACI/OT-HXY, with the AO3401A, SM5817PL-TP and USB4520-03-0-A among its other parts. Its parts include 19 capacitors, 19 resistors, 8 switches, 5 ICs and 3 diodes. It belongs with the ESP32 boards of this library.
Main components
7
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometersMCP73831T-2ACI/OT-HXY
SOT-23-5LBattery ManagementHXY MOSFET
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
SM5817PL-TP
SOD-123FL-65℃~+125℃ 1 Independent 1A 20V 30A 450mV@1A SOD-123FL Schottky Diodes ROHSMicro Commercial ComponentsSchottky DiodesUSB4520-03-0-A
SMD-25℃~+85℃ 1 12P 48V 5A Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
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)
README
README.mdAnachon
Digital Pocketwatch
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C6, C9, C10, C13, C14, C15, C16, C20, C21 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R6, R7, R8, R15, R17, R18, R19, R20 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C4, C5, C8 |
| 3 | 4k7 | Resistor_SMD:R_0603_1608Metric | R3, R13, R14 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R11, R12 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C2, C3 |
| 2 | 4pF | Capacitor_SMD:C_0603_1608Metric | C11, C12 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | Pad | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SW1, SW2 |
| 1 | +3.3V | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 0603 LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | 10k | Capacitor_SMD:C_0603_1608Metric | R5 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C17 |
| 1 | 22k | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 32.768kHz | footprints:XTAL_SC32S-7PF20PPM_EPS | Y1 |
| 1 | 470 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | AP2112K-3.3TRG1 | footprints:SOT_RG1_DIO | U1 |
| 1 | BMI270 | footprints:BMI270_BOS-M | U4 |
| 1 | BOOT | footprints:SW_TS18-5-25-SL-160-SMT-TR | S2 |
| 1 | Battery_Cell | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | BT1 |
| 1 | Crown Button | footprints:PTS845_CNK | S4 |
| 1 | EC05 | footprints:EC05 Encoder | S6 |
| 1 | ESP32-S3 N8R8 | RF_Module:ESP32-S3-WROOM-1 | U3 |
| 1 | FFC2B35-18-G_REVA2 | footprints:GCT_FFC2B35-18-G_REVA2 | J2 |
| 1 | Left Button | footprints:PTS845_CNK | S3 |
| 1 | MAX98357A | Package_DFN_QFN:TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm_ThermalVias | U5 |
| 1 | MCP73831T-2ACI_OT | footprints:SOT95P270X145-5N | U2 |
| 1 | Motor Pads | TestPoint:TestPoint_Pad_D2.0mm | MP1 |
| 1 | RESET | footprints:SW_TS18-5-25-SL-160-SMT-TR | S1 |
| 1 | RX | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | Right Button | footprints:PTS845_CNK | S5 |
| 1 | SCL | TestPoint:TestPoint_Pad_D1.5mm | TP7 |
| 1 | SDA | TestPoint:TestPoint_Pad_D1.5mm | TP6 |
| 1 | SM5817PL-TP | footprints:CR_5817PL-TP_MCC | D3 |
| 1 | TX | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | USB4520-03-0-A | footprints:GCT_USB4520-03-0-A_REVA | J1 |
| 1 | USBLC6-2SC6 | footprints:SOT23-6L_STM | D1 |
| 1 | VBAT | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | VBUS | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
Questions
How big is the Anachron PCB?
It measures 42.3 × 47 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Anachron use?
67 parts, built around the AP2112K-3.3TRG1, BMI270, MCP73831T-2ACI/OT-HXY and AO3401A. 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 Anachron KiCad files?
From the KavEn06/Anachron repository on GitHub, at the commit this page was made from: the board is Anachron/Anachron.kicad_pcb and its schematic Anachron/Anachron.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Anachron design in my own project?
Its repository states no licence, so its author keeps all rights: ask KavEn06 before reusing the design.
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