2 layers109.8 × 41.5 mm Base, the printed circuit board in 3D

Base

Numitron Clock

Size: 109.8 × 41.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 59
Nets: 98
Pads: 325
Tracks, vias: 1,267, 193
Pours: 410
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 8 Dec 2023
Updated: 22 Dec 2023

Overview

Base is an open-source printed circuit board by AL-255, from the AL-255/Flora2 repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 109.8 × 41.5 mm with 59 parts on 98 nets, routed with 1,267 tracks and 193 vias.

It is built around the ESP32-C3-MINI-1, LMR62421XMF and CMT-8503-85B-SMT-TR. Its parts include 17 resistors, 13 capacitors, 13 ICs, 4 transistors and 2 diodes. It belongs with the ESP32 and RISC-V boards of this library.

Main components

README

README.md

Flora2

Numitron Clock

Parts

Qty	Value	Footprint	References
7	100nF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C3, C4, C5, C10, C11, C12, C13
6	10K	Resistor_SMD:R_0402_1005Metric	R6, R7, R8, R9, R10, R14
5	1uF	Capacitor_SMD:C_0805_2012Metric	C1, C2, C6, C7, C8
4	20	Resistor_SMD:R_0402_1005Metric	R11, R15, R16, R17
4	2N7002	Package_TO_SOT_SMD:SOT-23	Q1, Q2, Q3, Q4
4	Kartusche IV9	Flora:Kartusche_IV9	U6, U9, U11, U13
4	TPIC6C595 / TLC6C598	Package_SO:SOIC-16_3.9x9.9mm_P1.27mm	U7, U8, U10, U12
2	22	Resistor_SMD:R_0402_1005Metric	R4, R5
2	5.1K	Resistor_SMD:R_0402_1005Metric	R2, R3
2	SOD323	Diode_SMD:D_SOD-323_HandSoldering	D1, D2
1
1	0	Resistor_SMD:R_0402_1005Metric	R1
1	1M	Resistor_SMD:R_0402_1005Metric	R12
1	220pF	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C9
1	22K	Resistor_SMD:R_0402_1005Metric	R13
1	6.8uH	Inductor_SMD:L_Sunlord_MWSA0402S	L1
1	BOOT	Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx83-2LFS	SW2
1	CMT-8503-85B-SMT-TR	Flora:CMT850385BSMTTR	LS1
1	ESP32-C3-MINI-1	PCM_Espressif:ESP32-C3-MINI-1	U14
1	LD1117S33TR_SOT223	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U2
1	LMR62421XMF	Package_TO_SOT_SMD:SOT-23-5	U5
1	RST	Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx83-2LFS	SW1
1	U0RXD	TestPoint:TestPoint_Pad_D3.0mm	TP1
1	U0TXD	TestPoint:TestPoint_Pad_D3.0mm	TP2
1	USB_C_Receptacle_USB2.0	Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
1	WE-TVS-82400102	Package_TO_SOT_SMD:SOT-23-6	U3
1	~	Flora:MITSUMI_SIQ-02FVS3	U4

The 57 most common of 59 parts.

Questions

How big is the Base PCB?

It measures 109.8 × 41.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Base use?

59 parts, built around the ESP32-C3-MINI-1, LMR62421XMF and CMT-8503-85B-SMT-TR. 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 Base KiCad files?

From the AL-255/Flora2 repository on GitHub, at the commit this page was made from: the board is hardware/base/base.kicad_pcb and its schematic hardware/base/base.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Base design in my own project?

Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

ESP32 RISC-V

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/al-255-flora2-base" title="Base in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/al-255-flora2-base.jpg" alt="Base" width="1200" height="900">

A picture that opens the board, for a README

[![Base](https://pcbkit.io/embed/boards/al-255-flora2-base.jpg?size=s)](https://pcbkit.io/boards/al-255-flora2-base)

Source

Repository: AL-255/Flora2
Board file: hardware/base/base.kicad_pcb
Commit: c7850fb
Licence: CERN-OHL-S-2.0

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