2 layers50 × 50 mm M16, the printed circuit board in 3D

M16

A home for a bunch of microcontroller projects which don't warrant their own repos.

Size: 50 × 50 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 59
Nets: 56
Pads: 215
Tracks, vias: 608, 78
Pours: 2
Routed: Yes
KiCad: KiCad 4
Created: 20 Nov 2014
Updated: 6 Jul 2024

Overview

M16 is an open-source printed circuit board by thebiguno, from the thebiguno/microcontroller-projects repository on GitHub. It is a 2-layer board of 50 × 50 mm with 59 parts on 56 nets, routed with 608 tracks and 78 vias.

It is built around the ATMEGA32U4-AU, 74LS125DC and ESP8266EX, with the WS2812 among its other parts. Its parts include 19 capacitors, 17 resistors, 9 connectors, 4 ICs and 2 diodes. It belongs with the ESP8266 and AVR (ATmega, ATtiny) boards of this library.

Main components

README

README.md

microcontroller-projects

A home for my microcontroller projects, including Stubby the Hexapod and others. It includes libraries for avr-gcc along with sample programs on how to use them, some KiCad modules, and the source code for a number of projects.

Some major projects include:

Stubby the Hexapod (http://stubby.digitalcave.ca/stubby/) (Now extracted into its own repo at https://github.com/thebiguno/stubby)
DrumMaster (http://drummaster.digitalcave.ca/drummaster/)
Chiindii (http://chiindii.digitalcave.ca/chiindii/)

Some of the AVR libraries included here are:

serial communications
TWI (I2C), with support for master read / master write / slave read / slave write, plus callback functions for asyncronous communications
reading data from a PS2 controller
timer functions
and much more

Parts

Qty	Value	Footprint	References
9	1u	DigitalCave:SM0603_VALUE	C7, C8, C9, C10, C11, C12, C13, C15, C18
5	10n	DigitalCave:SM0603_VALUE	C1, C2, C3, C4, C19
5	1k	DigitalCave:SM0603_VALUE	R1, R2, R3, R4, R14
4	10k	DigitalCave:SM0603_VALUE	R5, R6, R7, R11
3	10K	DigitalCave:SM0603_VALUE	R10, R12, R13
2	22	DigitalCave:SM0603_VALUE	R8, R9
2	8p	DigitalCave:SM0603_VALUE	C5, C6
2	MOUNTING_HOLE	Mounting_Holes:MountingHole_3.5mm_Pad	MP1, MP2
2	TVS	TO_SOT_Packages_SMD:SOT-23	D1, D2
1	100	DigitalCave:SM0603_VALUE	R17
1	100u	Capacitors_THT:CP_Radial_D6.3mm_P2.50mm	C16
1	16M 8p	Crystals:Crystal_SMD_3225-4pin_3.2x2.5mm	X1
1	2.2u	DigitalCave:SM0603_VALUE	C17
1	220	DigitalCave:SM0603_VALUE	R16
1	2k	DigitalCave:SM0603_VALUE	R15
1	32.768k 6-9p	Crystals:Crystal_SMD_SeikoEpson_MC306-4pin_8.0x3.2mm	X2
1	3V	Battery_Holders:Keystone_3034_1x20mm-CoinCell	BT1
1	470u	Capacitors_THT:CP_Radial_D8.0mm_P3.80mm	C14
1	74LS125	Housings_SSOP:TSSOP-14_4.4x5mm_Pitch0.65mm	U1
1	ATMEGA32U4-A	Housings_QFP:TQFP-44_10x10mm_Pitch0.8mm	U2
1	ENC1	Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm	P1
1	ENC2	Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm	P2
1	ESP8266	Pin_Headers:Pin_Header_Straight_2x04_Pitch2.54mm	P7
1	HWB	DigitalCave:SW_6x3	SW2
1	IR	Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm	P6
1	MCP7941X	Housings_SSOP:TSSOP-8_4.4x3mm_Pitch0.65mm	U3
1	MIC5219-3.3BM5	TO_SOT_Packages_SMD:TSOT-23-5	U4
1	Molex 475710001	DigitalCave:475710001	P4
1	PWR	Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm	P5
1	RST	DigitalCave:SW_6x3	SW1
1	TEST_1P	Connectors:PINTST	J2
1	USB_OTG	Connectors:USB_Mini-B	P3
1	VAL**	DigitalCave:WJ20	WJ20
1	WS2812	Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm	P8

Questions

How big is the M16 PCB?

It measures 50 × 50 mm and has 2 copper layers, 1.6 mm thick.

What parts does the M16 use?

59 parts, built around the ATMEGA32U4-AU, 74LS125DC, ESP8266EX and WS2812. 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 M16 KiCad files?

From the thebiguno/microcontroller-projects repository on GitHub, at the commit this page was made from: the board is projects/m16/kicad/avr/m16.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the M16 design in my own project?

Its repository states no licence, so its author keeps all rights: ask thebiguno before reusing the design.

Category and platform

ESP8266 AVR (ATmega, ATtiny)

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/thebiguno-microcontroller-projects-m16-2" title="M16 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/thebiguno-microcontroller-projects-m16-2.jpg" alt="M16" width="1200" height="900">

A picture that opens the board, for a README

[![M16](https://pcbkit.io/embed/boards/thebiguno-microcontroller-projects-m16-2.jpg?size=s)](https://pcbkit.io/boards/thebiguno-microcontroller-projects-m16-2)

Source

Repository: thebiguno/microcontroller-projects
Board file: projects/m16/kicad/avr/m16.kicad_pcb
Commit: 18392f6
Licence: Not stated

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