HP Forum Archive 19

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OT: DIY Oscilloscope Message #1 Posted by Egan Ford on 14 May 2009, 5:28 p.m. http://www.wired.com/gadgetlab/2009/05/diy-oscilloscope-is-awesomely-affordable/

Re: OT: DIY Oscilloscope Message #2 Posted by DaveJ on 14 May 2009, 6:02 p.m., in response to message #1 by Egan Ford Quote: http://www.wired.com/gadgetlab/2009/05/diy-oscilloscope-is-awesomely-affordable/ Hmm... 200KHz single shot bandwidth, no BNC connector, 256 byte memory, external supply, no case. I think your money is much better spent elsewhere. Dave.

Re: OT: DIY Oscilloscope Message #3 Posted by Steve Simpkin on 14 May 2009, 11:43 p.m., in response to message #2 by DaveJ Pretty cool for the price but for only a bit more ($135 + shipping) you can can get a complete portable scope with the following features: * 10MHz sampling rate * 0.1mV sensitivity * up to 2MHz analog bandwidth * 5mV to 20V/div in 12 steps * 200ns to 1hour/div time base in 32 steps * full auto set up * trigger mode: run, normal, once, roll, slope +/- * X and Y position signal shift * DVM readout with x10 option * audio power calculation (rms and peak) * dBm, dBV, DC, rms ... measurements * signal markers for Volt and Time * frequency readout (through markers) * recorder function (roll mode) * signal storage (2 memories) * LCD: 128x64 pixels / high-contrast * up to 20h on alkaline batteries http://tinyurl.com/pqr6gc

Re: OT: DIY Oscilloscope Message #4 Posted by DaveJ on 15 May 2009, 12:11 a.m., in response to message #3 by Steve Simpkin Exactly. No point getting something for a bargain price if it's not going to meet your basic needs. That Velleman is infinitely more usable and better value for money. Dave.

Re: OT: DIY Oscilloscope Message #5 Posted by Martin Pinckney on 14 May 2009, 6:17 p.m., in response to message #1 by Egan Ford Just for kicks, can one of you electronic wizzes figure out how to hack a connection to display this things output on a 48 screen? (I mean with it still remaining a functioning calculator)!

Re: OT: DIY Oscilloscope Message #6 Posted by DaveJ on 14 May 2009, 6:33 p.m., in response to message #5 by Martin Pinckney Quote: Just for kicks, can one of you electronic wizzes figure out how to hack a connection to display this things output on a 48 screen? (I mean with it still remaining a functioning calculator)! Add a serial port to the scope, hook up serial cable, hack some firmware. Entirely possible. Dave.

Re: OT: DIY Oscilloscope Message #7 Posted by John Robinson on 14 May 2009, 7:04 p.m., in response to message #1 by Egan Ford Where do you get one from ? it's not obvious from the article Cheers, John

Re: OT: DIY Oscilloscope Message #8 Posted by Paul Dale on 14 May 2009, 7:05 p.m., in response to message #7 by John Robinson Try the Product Page link at the bottom of the article. - Pauli

Re: OT: or a Streamsmart 400 + a 40gs?? Message #9 Posted by Allen on 14 May 2009, 7:27 p.m., in response to message #8 by Paul Dale Could one not use a Stream Smart 400 and a 40gs? Edited: 14 May 2009, 7:28 p.m.

Re: OT: or a Streamsmart 400 + a 40gs?? Message #10 Posted by Dave Shaffer (Arizona) on 14 May 2009, 9:32 p.m., in response to message #9 by Allen Quote: Easily collect data points at up to 5,700 samples/second Copied from the Stream Smart 400 reference. Unless you are doing very low speed stuff, I don't think you would be very happy at this data rate. I got a pretty nice 100 MHz Tektronix dual-trace scope on ebay a couple of years ago for around $200, including shipping, so I tend to agree with DaveJ - spend a few bucks more, and get a real scope! (My latest ebay toy is a 1.8 GHz spectrum analyzer. I'm having GREAT fun with it!)

Re: OT: or a Streamsmart 400 + a 40gs?? Message #11 Posted by agodwin on 15 May 2009, 1:44 p.m., in response to message #10 by Dave Shaffer (Arizona) I dunno - I've got lots of lovely old analog scopes and I wouldn't let them go. They all cost less than $400, too. But this is nice and small and portable and $35 really isn't very much. I could be tempted to have a play. Though a scope module for a 50g (that lets you do something with the data you read) would be a much nicer idea.

Re: OT: or a Streamsmart 400 + a 40gs?? Message #12 Posted by Egan Ford on 15 May 2009, 4:51 p.m., in response to message #11 by agodwin Quote: But this is nice and small and portable and $35 really isn't very much. I could be tempted to have a play. That was the point of my original post. It was my no means a contender for a real scope. It's a DYI project with open source software just like uWatch. Something to play with and learn from.

Re: OT: DIY Oscilloscope Message #13 Posted by Thomas Radtke on 16 May 2009, 8:22 a.m., in response to message #1 by Egan Ford I was about ordering one. Unfortunately, both the kit and the assembled oscilloscopes were out of stock. It seems the have some supply difficulties as a new batch were announced for somewhere in April.

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