Parral Dev Board

Parral Dev Board
open source
Prototyping platform

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Parral Dev Board is an open source protoboard friendly development board based on the powerful P8X32A 8-core 32-Bits microcontroller, Parral Dev Board was designer to be plugged on a protoboard and provide you of 3.3v or 5v to power supply your protoboard projects.
Parral Dev Board is an easy to learn coding platform that provide you a high level C lenguage with and interactive IDE plantform and a wide number of libraries and tutorials.
Parral Dev Board is also compatible with Blocklyprop, the web-based visual programmer editor to any one can create and learn to use this awesome platform.

Parral dev board is available on Kickstarter now!!


Parral dev board is for everyone who loves making awesome stuff. We envision a platform and community where people with different skill levels can channel their creativity into reality whether, It is a do-it-yourself platform project, a startup idea or an educational tool for your kids. We believe that despite having different goals and levels of expertise, you all share our love for building.


  • Removable P8X32A 8-core 32 bits microcontroller system with 512KB EEPROM and 5 MHz oscillator.
  • Micro-B USB connector for powering, programming, and communication
  • Open source BlocklyProp, C, Spin, and assembly language programming tools
  • Additional LEDs indicate power and TX/RX communication
  • Tiny edge-mounted reset button to restart the microcontrolle without disconnecting
  • Safety 500ma Fuse
  • Two Tiny edge-mounted built-in, user-programmable Buttons
  • Two built-in, user-programmable LEDs
  • 3.3v/5v selectable Power Supply
  • Protoboard friendly design


Parral dev board is available on Kickstarter now!!

  • 1 × P8X32A Microcontroller
  • 1 × FTDI FT231XS TTL convert
  • 1 × 24LC512 Memory ICs / EEPROMs
  • 1 × 5 Mhz oscillator Crystal oscillator
  • 1 × Micro USB Connector Connector

View all 6 components

  • Parral

    Daniel Garcia11/15/2016 at 06:40 0 comments

    1. The goal of this project is make a powerfull but easy and simple Dev board for begginers, with a friendly desing you can plug it on your breadboard and choose how you want to power up your breadboard. In my design the supply voltaje is configured through a jumper. While you have the option to power it directly from the usb supply voltage (5V), or using the 3v3 voltage regulator output (3V3). In addition you can set the jumper between 5V and 3.3V, and you have option to power up the board from the usb connector or using a 9v battery by the power jack.

    Parral deb board has 4 objects to be programmed onboard, 2 leds and 2 push buttoms. Which you can create your own firmware and start with output and input configurations, the "hello word" in embedded systems

    I decided to use a DIP-40 microcontroller to give you the opportunity to use only the MCU on your breadboard and use the board like power supply and programer, since it has a programming port and choose between 5V or 3.3V supply voltage.

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yeti wrote 11/16/2016 at 05:41 point

Some of the contemporary Propeller software already requires a 64 kbytes EEPROM. Having the Propeller on a socket to be available for breadboarding is a nice idea. Doing the same with the EEPROM would make sense and the EEPROM being the only part of the board that can wear out, having it socketed would make double sense. For the quartz, the capacitors and the I2C pullups, just include a set of them in a bag with your kit.

Having the quartz on the devboard removable would be nice too for swapping in other "speeds". Disabling the onboard quartz by jumpers and adding the other quartz on the breadboard would be equivalent.

Fixed onboard peripherals may come in your way. I prefer not to have switches and LEDs onboard. Adding LEDs and switches for playing with them on the breadboard probably is not too complicated for beginners.

And in contrast to the comments in the Parallax forum, I don't like micro USB. They are too fragile. Mini is better, fullsize may be overkill today. But the USB2 world seems to converge on micro USB and I will not be able to stop that.. :-(

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yeti wrote 11/15/2016 at 22:50 point

Why not waste the space of 2 more pins to have exactly the Propeller footprint on the breadboard? That would make transition from this devboard to a "naked" P8X32A-D40 on a breadboard easier.

And why a 32k EEPROM? That's sooooo last millenium! ;-)

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Daniel Garcia wrote 11/16/2016 at 04:35 point

Hi Yeti

I did not put the 2 pins because they are the VCC and GND pins, you don't need those pins in the footprint on the breadboard.
About the epromm memory, the microcontroller need the epromm memory, this epromm is a 32k x 8, but I can use the AT24C512.

Your opinion is very important for me, I will consider all your opinions in a future review, so thank so much for your tips. :)
If you want more information, please contact me.

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