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    EEVblog #1056 – Digilent Open Scope MZ Review

    Dave looks at the Digilent Open Scope MZ Review, an $89 open source oscilloscope, logic ...

    • Jan

      Hi Dave!

      Could you please tell us something about your adjustable current source or mybe even do a teardown?



      • I’m sure it’ll make it’s way to Teardown Tuesday!

    • huh

      Now all it needs is a uC to read the serial output off the multimeters then make an audible sound to let you know whether the board is within specs or not. The visual inspection forces you to look at the multimeters and back, which takes time.

    • Daves Not Here

      Nice demo of making a jig. Taking a unit you already have and modding it for a test rig is classic! The way it’s arranged you can’t put it on backwards, clever one.

      I’d like to mention that the test jig should be marked so you can pick it out of hundreds. This way jigs won’t be sent out as product and you can always find it on the bench.

      Daves Not Here

    • Nick

      Nice tutorial but, now, a question has risen: What do you do or plan to do with all these case covers you don’t use? It looks like they are the ones used for your μWatch. Why don’t you start it all over again?


      • It’s about 5 times bigger than my uWatch!

    • Ondre

      Great fun to watch Robo-Dave!

    • JRR

      One thing occurred to me since you’re a fellow 3D printer owner – It’s probably not worth it in this case, but it would be neat to build an OpenSCAD script that would take an array of points and build then print a holder that would hold a set of pogo pins in given locations.

      For more complex testing that would be pretty neat I think. You could print a 5mm thick rectangle of plastic with a bunch of holes in given places pretty quick and the tolerances would be fine for that.

      • Sure. Not needed in this case, but could be very useful for others.

    • Worf

      So where can I buy the test jig? That link only lets me buy uCurrents….

      • Worf

        Yes, I forgot a 🙂 at the end of that.

      • f4eru

        don’t buy the test jig, make it:))

    • MG

      I would have made the jig so that the ucurrent would end face up; that way, I could later make a neat circuit to test the 3 ranges at the same time without going trough all the boards 3 times. I bet I could make it test all the board features in less than 10 seconds per unit, wich would save about 10-15seconds per unit. It’s not very useful (I’d save only 12 minutes for 50 units) but it would be fun.

    • Alex


      Suppose I want to measure a pulse of current. How fast a response can I get for your uCurrent?

      • The full article has the bandwidth measurements in it.

    • Philip

      You should use 3 of the 10 saved seconds to place autographs on them… Would make it even more unique.

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