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Duane Degn
03-14-2012, 04:17 PM
I was going to post these pictures in rwgast's thread (http://forums.parallax.com/showthread.php?138620-Finally-my-prop-module-PCB!!-Would-appreciate-any-input-decoupling-wiring-etc)but I didn't want hijack the thread.

I'll post them here an add a link to this post in the other thread.

I built a couple of boards a few years ago when I was new to the Prop (and uCs in general). This was before there were GG boards or QuickStarts or many of the other options that are now available. I doubt I'd have made these if a board like the QuickStart had been available since it's easy to place a QS next to a breadboard and plug wires into its header.

The idea was to make it easy to use a Propeller with a breadboard for prototyping circuits.

Here are some pictures.

90573

A surface mount Prop is on one of these boards (http://www.sparkfun.com/products/8879)from SparkFun. The extension with the male headers pointing down is made from part of one SF's Wombat (http://www.sparkfun.com/products/8619)boards. The Wombat is a really high quality perf board. The cost more than the cheap perf board from RS but the through hole plating make them much easier to use for some projects IMO.

You can see where the perf board was added in this next picture (bottom of board).

90576

I made the voltage regulators removable so I could use them independent from the board.

90575

Here's the board plugged into a breadboard. The red wire is 3.3V and the red wire with green heat shrink is 5.0V (I used green because of it's 5's resistor value color code).

http://forums.parallax.com/attachment.php?attachmentid=90574&d=1331740338

Here's a picture of an earlier version using a DIP Propeller chip.

90577

The power supply is not removable on this one.

One of my plans when making these was to be able to leave a circuit setup on a breadboard and still be able to remove the Prop to use with a different project. This was when Prop chips cost $12 each and I didn't want to tie up a Prop with only one project. These modules are kind of obsolete now that QS boards are so inexpensive. Though I still use them once in a while.

Duane Degn
03-14-2012, 04:18 PM
Add more details here.