The owon hds1021m is a handheld electrical test device that combines a 20 mhz, single-channel, handheld digital oscilloscope for viewing electrical signals with a manual- and auto-ranging digital multimeter for measuring ac and dc voltage to 400v, ac and dc current to 20 amp, resistance to 40 m?, and capacitance to 100?f.

Last time I introduced you to two relatively inexpensive and somewhat portable scopes: the EM125, which is a cross between a digital voltmeter and an oscilloscope, and the Wave Rambler, which is a scope probe with a USB connector attached. Both of the devices cost about $100, and both have their plusses and minuses. This time, though, I wanted actually to look at some real-world signals. To make that easy, I grabbed yet another scope-like thing I had handy: an Embedded Artists Labtool. This is an interesting board in its own right. It is an LPC-Link programmer attached to an scope2wd5gnr1pwm-rigoluart-rigolowon2owon3em125bem125c.

Do you have a touch-screen oscilloscope? Neither do we. But how cool would that be to pan left and right or expand either axis just like you do on your cellphone screen? [Igor] did just that, and the results (in the video below the break) look fantastic. We’ve covered [Igor]’s previous round of hacking on his Siglent scope, where he bricked it by flashing the wrong firmware, and then fixed it by Frankensteining the screen into the box that the firmware wanted. But once he’d gotten the scope-hacking bug, he couldn’t quit.

A brief overview: an Arduino Nano reads the front_featured_blogviewhexagon5un. Something very beautiful appeared in our feed this evening, something that has to be shared. [Duncan Malashock] has created an animation of raindrops creating ripples. Very pretty, you might say, but where’s the hack? The answer is, he’s done it as a piece of vector display work on an oscilloscope. He’s using [Trammell Hudson’s] V.st Teensy-powered vector graphics board.

We’ve featured this board before, but then it was playing vector games rather than today’s piece of artwork. The ‘scope in question is slightly unusual, a Leader LBO-51, a device optimized for vector work rather than the general purpose ‘scopes we. Fancy measurement gear is often expensive to buy, but some bits of kit are entirely DIY’able if you’re willing to put a little work into the project. [Christer Weinigel] needed to get some measurements of a differential clock signal that was ticking away around 500 MHz. El-cheapo probes aren’t going to cut it here.

They won’t have the bandwidth and most off-the-rack probes are single-ended, that is they’re referenced to ground. [Christer] needed the difference between two balanced signals, neither of which is grounded.

In short, [Christer] needed a high-frequency active differential oscilloscope probe, and they’re not cheap. So he probe_featuredhexagon5unsimulation-schematic.

From what we can understand, [ompuco] has built a 2D audio output on top of the Unity game engine, enabling him to output X and Y values from his stereo soundcard straight to an oscilloscope in XY mode. His code simply scans through all the vertexes in the scene and outputs the right voltages into the left and right audio streams. He’s using this to create some pretty incredible animations. Check out the video “additives” below for an example. (See if you can figure out what’s being “added”.) As a first demonstration application, [ompuco] wrote an oscilloscope drawing application: electricanvas lpfxr3l-featuredhexagon5un. When you work at Tektronix and they make a difficult to refuse offer for their ‘scopes, you obviously grab it. Even if the only one you can afford is the not-so-awesome TDS1012.

[Jason Milldrum] got his unit before cheaper, and better ‘scopes appeared on the market. It served him well for quite a long time.

But keeping it switched on all the time took a toll, and eventually the CCFL backlight failed. Here’s how he replaced the CCFL back light with a strip of LED’s and revived the instrument.

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Searching for an original replacement CCFL backlight didn’t turn up anything tds1012_01_featuredanool. One of the most ingenious developments in test and measuring tools over the last few years is the Mooshimeter. That’s a wireless, two-channel multimeter that can measure voltage and current simultaneously. If you’ve ever wanted to look at the voltage drop and power output on a souped up electrified go-kart, the Mooshimeter is the tool for you. A cheap, wireless multimeter was only the fevered dream of a madman a decade ago. We didn’t have smartphones with Bluetooth back then, so any remote display would cost much more than the multimeter itself.

Now this test and measurement over Bluetooth is aero-testing-beer_jpg_project-bodybrianbenchoff. It is something of a rite of passage for an electronics enthusiast, the acquisition of a first oscilloscope. In decades past that usually meant a relatively modest instrument, maybe a 20MHz bandwidth and dual trace if you were lucky. Higher spec devices were eye-wateringly expensive monsters, not for the Common People. We are fortunate that like most other areas of technology the world of test equipment has benefited in the last few years both from developments in digital technology and from the growth in Chinese manufacturing. If your first ‘scope is that second-hand 20MHz CRT you will probably secure it owon-scope-featuredjennylist.