A breakout board for standalone Arduino Leonardo based on the KiCAD pinoutDesigned by Ivory Circuits, Ships from United Kingdom
WELCOME EVERYONE! 👋 We're proud to introduce the one and only Nakeduino-32U4. What is it? you may ask... 😵 The Nakeduino is a bare Arduino development board compatible with SMD chips loaded with t...Read More…
We're proud to introduce the one and only Nakeduino-32U4.
What is it? you may ask... 😵
The Nakeduino is a bare Arduino development board compatible with SMD chips loaded with the Leonardo bootloader (and virtually any other). The PCB only holds the MCU! The pinout is based on the schematic symbol from KiCAD, as showed in the attached schematic.
We designed the Nakeduino-32U4 thinking of makers, engineers, tinkerers and hobbyists who are looking for a solution for prototyping their own standalone Arduinos before implementing them on a more complex system. Why? Because at some point you are going to prefer to shrink the footprint of your project instead of embedding that bulky board that you've using during the prototyping stage.
With this bare board your projects will take the next big step by embedding your Arduino Microcontroller on them. It will give you full control of your design before implementing your own standalone Arduino on your PCB design. Just connect a 16 MHz crystal, two 22 pF capacitors, a 470 Ohms resistor and one LED to PIN 13 (PB1) and your board (with an MCU+bootloader) will be ready to rock :metal:
We believe it is an important tool since usually designers (including ourselves) take for granted the functional sections of the Arduino when using commercial boards including clones. Better be safe than sorry!
As part of the many advantages, key points and why this board is going to help you, we have:
a. ICSP connections: you can load your code using an USBasp programmer in case you don't plan to use the USB port from the MCU,
b. Test a correct design of the RST circuit,
c. Clock signal generators: allowing you to test the best crystal and capacitors, test your resonator of choice and even overclock your board (* this requires the modification of fuses on the bootloader as explained by Joop Brokking here),
d. USB connection: you can choose whether to use it or not,
e. Test appropriate power supplies for the MCU and your own automatic voltage selector (USB or RAW Vcc),
f. Breadboard friendly: As shown in the attached pictures, the size is appropriate for all commercial prototyping boards. 20-pin headers must be soldered on each side of the PCB.
In addition, with this board you will have access to all of those pins that are not routed on boards like the Pro Micro. For example: pin D17 is assigned only to the Rx LED and perhaps your project needs to use CS from the SPI Port being that D17 also corresponds to that pin.
We designed the pinout distribution in a way that makes sense since all of the support pins were routed on the bottom-left hand side of the PCB leaving you total access to the usable analog and digital pins on the rest of the board. The silkscreen CLEARLY shows the pin correspondence.
In the attached picture we exemplify an application of our board using it as a digital counter driving 7 segment displays.
IMPORTANT UPDATE! (01-03-2019)
The MCUs have arrived! We will be offering boards populated with microcontroller. These will be available in kits with crystals and capacitors! Please notice that we will supply these kits with the best possible quality of components like Vishay caps not rubbish 'cheap' ones. For further info read the datasheets.
IvoryCircuits Team 😎
Ergin | April 1, 2019
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