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Propeller Breadboard

This is the place to talk about Parallax Propeller Chip and Boards
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jlocke
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Propeller Breadboard

Postby jlocke » Thu May 14, 2015 11:24 pm

A P8X32A Microcontroller for Breadboards

The Propeller Breadboard is a Parallax P8X32A system for breadboarding circuits. All I/O pins from the processor are brought out to a single row of pins spaced at 0.1" intervals. The circuit board also has two pins providing regulated +5V and Gnd to power the breadboard rail. A second regulator onboard provides the +3.3V for the P8X32A and the 24LC512 EEPROM.

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Hardware Details
The schematic and layout for the Propeller Breadboard is below. It is a 'bare bones' circuit to support the Parallax Propeller. Input power is 7.5-10VDC, provided through a standard 2.1mm power jack. The voltage is regulated to +5V via a LM7805 regulator. The +5V is provided to pins to power the breadboard rail and to the input of the LM2950ACZ which provides the regulated 3.3V to power the microcontroller and EEPROM. Programming of the board is done via a 'Prop Plug' or similar logic-level serial interface.

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v1.3 Schematic.pdf
v1.3 PCB Layout.pdf
v1.3 BOM.pdf

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zappman
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Re: Propeller Breadboard

Postby zappman » Fri May 15, 2015 6:41 pm

John,

I like the way your board plugs into the protoboard, providing access to all the Prop I/O and power & ground.

You have done a great job of documenting your board, schematic, PCB layout and BOM.

How many of the blank circuit boards did you have made?

Who did you use make the boards?

Thanks,

zappman
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jlocke
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Re: Propeller Breadboard

Postby jlocke » Sun May 17, 2015 12:48 am

I had the pcb's made through OSH Park, so I get them made 3 at a time. It usually takes 2-3 weeks to get the boards.

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Re: Propeller Breadboard

Postby pilot0315 » Mon Jun 08, 2015 4:37 pm

I like this. I designed a pcb based on one of the propeller boards that has mouse keyboard screen rf i/o but able to get all 32 pins with ic data switches manually.

Was fun

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Re: Propeller Breadboard

Postby Granz » Mon Jun 08, 2015 6:18 pm

Nice looking, JLocke.

An idea for you to consider - use a right-angle male header. That would get the flat PCB up and out of the way of components surrounding the breadboard.
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jlocke
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Re: Propeller Breadboard

Postby jlocke » Tue Jun 09, 2015 12:50 am

That's a good idea about using a right-angle header. I'll have to try that with the next batch I make.

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Re: Propeller Breadboard

Postby jknightandkarr » Fri Jun 19, 2015 4:12 am

I have one of these. Got it from the traveling parts box. I have yet to use it yet. Was trying to think of what I could make with it.

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