PropScope Book published

Big congratulations to everyone at Parallax (particularly Andy, Ken and Steph) for completing the PropScope book: “Understanding Signals with the PropScope”. This 350+ page book starts with the basics but through detailed tutorials and exercises takes users all the way to advanced electronic topics like amplifiers, filters and communication protocols.


The 350 page text demonstrates how to use the PropScope as a voltmeter, oscilloscope, function generator, logic analyzer, spectrum analyzer, while introducing common circuits. The kit also includes electronic components for building breadboard circuits on your own Board of Education or BASIC Stamp HomeWork Board (boards sold separately). Designed for beginners as part of our Stamps in Class program, it is a useful reference for any PropScope owner as well.

Like other Parallax education resources it’s available as a free PDF here:…cope-1.0.0.pdf

Or as a real book here:…st,ProductName

Or, as a package deal which includes the PropScope and parts referenced in the book…0/Default.aspx

Google Tech Talk

I’ve been busy talking about how I use the Propeller in all my projects- including DanceBot, ViewPort, 12Blocks, PropScope, and TBot. In the last 2 weeks I’ve given 6 presentations with lots of demos- including a tech talk at Google. It’s always quite an experience visiting the Google campus- highlight was walking up the stairs and looking up to see SpaceShipOne hanging above me.

A dozen presentations about my projects…

I’m headed around the world to give a dozen presentations about my projects to various clubs, companies and schools.  Here’s a link to photos and videos from my first talk- given to the Robotic Society of Southern  California- just an hour after flying in from New Zealand!


Here’s the article: Presentation to Robotic Society of Southern California

PropScope ships!

I’ve been busy working on software for the Parallax PropScope- today it ships!
Here’s more info about it:
The PropScope is a two-channel oscilloscope that is capable of reading 25 million samples per second with ten bits of resolution over one, two, ten, or twenty volt peak-to-peak waveforms. Power is provided through the USB port requiring only a single cable to connect the PropScope to any laptop or desktop PC.
A built-in expansion port allows additional capabilities and upgrades, by simply plugging in an expansion card. A PropScope DAC card is even included, providing an analog trigger, a four-bit digital trigger, an eight-bit digital to analog converter, and a four-bit NTSC/PAL output. Other cards will be available to add even more useful features.
The included software provides a traditional scope interface along with auto measurements and the ability to store and export waveforms. The software also provides features not normally available in a stand-alone oscilloscope, including a function generator, a logic analyzer, a spectrum analyzer, a vector-scope, and more.
  • 2 input channels
  • 25 Msps Maximum Sample Rate
  • 20 Vpp maximum input range (-10 V to +10 V when DC-coupled)
  • 10-bit input resolution over either the entire 20 Vpp range, or selectable 10, 2, and 1 Vpp ranges.
  • 1x/10x selectable probes
Included Expansion Card Features:
  • External analog trigger with a -10 V to +10 V input range
  • 4-bit digital input and trigger
  • Arbitrary waveform generator with an 8-bit DAC and selectable -1.5 to 1.5 and 0 to 4.9 voltage ranges
  • 4-bit DAC for generating NTSC and PAL signals
Key Specifications:
  • Power requirements: USB powered
  • Communication: USB

Google Tech Talk

I gave a “Tech Talk” at Google about the projects I’m working on: ViewPort, the premier debugging tool for the Propeller, DanceBot, an interactive vision guided balancing robot, and PropScope, a multi-function usb oscilloscope/logic analyzer/function generator to be sold at retail for $199.