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Not Recommended for New Designs

consider adding 100nF capacitor on RESET line

markwuflux

consider adding 100nF capacitor on RESET line

UART_MCU_TX

AREF

XTAL1

D11_COPI

AREF

MCU_RESET

UART_MCU_TX

D10

AREF

D11_COPI

D10

D13_CLK

UART_MCU_RX

D12_CIPO

MCU_RESET

XTAL2

XTAL1

UART_MCU_RX

D12_CIPO

Note 5

Line 1

In Flux, once a project is packaged as a module, higher level users can only connect to terminals. Net portals are local and will be connected to the project's interfaces here.

Note 4

Line 1

Here you will find decoupling/bypass capacitors. Place 5V capacitors near MCU and place AREF capcaitor near AREF pin on MCU

Line 2

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Line 3

Decoupling capacitors provide a low impedance path to ground for higher frequency. EEVBlog makes a good YouTube video about this concept

Note 6

Line 1

A quick explainer for the reset circuitry

Line 2

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Line 3

State 1: (SW Open) = 1MOhm impedance | Lower impedance path is R2 @ 10kOhm so the voltage on MCU_RESET net is 5V (not reset)

Line 4

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Line 5

State 2: (SW Closed) = 0Ohm impedance | Lower impedance path is SW1 @ 0 Ohm so the voltage on MCU_RESET net is 0V (reset)

Note 2

Line 1

This is the UART programming header

Line 2

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Line 3

The recommended programmer can be found here (unhide line 4 in this note)

Line 5

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Designator Prefix

If you're using another programmer, feel free to use 2.54mm dupont wires to match the pinout of the design. Only Tx, Rx, and GND need to be connected for programming

5VTerminal

GNDTERMINAL

D13_CLK

D1_TX

AREF

Note 3

Line 1

You will find MOSI and MISO renamed to COPI and PICO respectively here. COPI stands for Controller Out Peripheral In and CIPO stands for Controller In Peripheral Out

Line 2

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Line 3

Don't forget to connect this to a physical ICSP breakout to flash the Arduino!

D11_COPI

Note 1

Line 1

This is the 16MHz Crystal Oscillator with internal 15pF capacitors

Line 2

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Line 3

You can choose to not populate this if you want to use the internal 8MHz clock

Line 4

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Line 5

Lern more about it here! https://en.wikipedia.org/wiki/Pierce_oscillator

MCU_RESET

D12_CIPO

D10

D0_RX

+5V

Resistance

1MΩ

Capacitance

4.7uF

Resistance

10kΩ

Capacitance

100nF

Capacitance

100nF

+5V

SW1

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Documents

Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

Assets

ArduinoXFlux.png

ArduinoXFluxThumbnail

Project Name

Arduino Nano Barebones - SMD No Header

Description

Important Note: You must connect your own SPI/ICSP programming header if you want to burn the Arduino bootloader to the MCU. In this version, you must also provide your own UART interface.

SMD Manufacturing: Need a hotplate and solderpaste

Good to haves:

Oscillator Decoupling Caps Expose UART via connector Programming Button Onboard LED Reset Button

You don't have to populate everything! Only these are mandatory: Reset Button

Find the reference schematic here: https://www.arduino.cc/en/uploads/Main/ArduinoNano30Schematic.pdf

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Digi-Key	$1.00–$2.66
LCSC	$2.50–$3.04
Mouser	$2.66

Controls

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markwuflux / Arduino Nano Barebones - SMD No Header

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