
MIXED TRACE (STM32F401RET6)
navaneeth-linh/CoreTrace-CT-F401RE
STM32F401RET6 Evaluation Board — Mixed Traces PCB Design Competition 2026 | Team CoreTrace

STM32-based Etch A Sketch widget with an OLED display and rotary encoders.
Etch a sketch is an open-source printed circuit board by disposedtrolley, from the disposedtrolley/etch-a-sketch repository on GitHub. It is a 4-layer board of 100 × 62 mm with 38 parts on 69 nets, routed with 308 tracks and 173 vias.
It is built around the STM32F401RET6, AMS1117-3.3 and B5819W. Its parts include 14 capacitors, 5 resistors, 4 connectors, 3 diodes and 2 ICs. It belongs with the STM32 boards of this library.
STM32-based Etch A Sketch widget with an OLED display and rotary encoders.

| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6, C7, C8, C9, C14 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_4.3mm_M4_Pad_Via | H1, H2, H3, H4 |
| 2 | 100 @ 100MHz | Inductor_SMD:L_0805_2012Metric | FB1, FB2 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C12, C13 |
| 2 | 2k2 | Resistor_SMD:R_0603_1608Metric | R1, R5 |
| 2 | Red | LED_SMD:LED_0603_1608Metric | D2, D3 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | HSE1 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C10 |
| 1 | 220 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | B5819W | Diode_SMD:D_SOD-123 | D1 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | Encoder 1 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | Encoder 2 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW2 |
| 1 | Micro USB B | digikey-footprints:USB_Micro_B_Female_10118194-0001LF | J4 |
| 1 | OLED | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J3 |
| 1 | STM32F401RET6 | Package_QFP:LQFP-64_10x10mm_P0.5mm | U2 |
| 1 | USART | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |

navaneeth-linh/CoreTrace-CT-F401RE
STM32F401RET6 Evaluation Board — Mixed Traces PCB Design Competition 2026 | Team CoreTrace


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Prakhar730/AHRS_PCB_Design
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It measures 100 × 62 mm and has 4 copper layers, 1.6 mm thick.
38 parts, built around the STM32F401RET6, AMS1117-3.3 and B5819W. 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 disposedtrolley/etch-a-sketch repository on GitHub, at the commit this page was made from: the board is Hardware/etch-a-sketch/etch-a-sketch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask disposedtrolley before reusing the design.