Author Topic: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown  (Read 25325 times)

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Offline Otatiaro

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #50 on: September 24, 2013, 01:37:25 pm »
Hello,

Received the lenses today ... first the polarized filter is crap, pretty much no effect.

With the +4 lens I get quite decent zoom and still have approx 22cm clearance between lens and work area. That is enough to solder under without issue.

Now the result is pretty good, but I feel there is some improvements on the lighting part ... you need diffuse lighting to get smooth reflection. With LED spot lights I get too much reflections from the spot itself.

Any idea ?

Thomas.
 

Offline synapsis

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #51 on: September 24, 2013, 03:30:30 pm »
For cheap and quick diffusion I've used just plain sheets of paper taped to the light.

I picked up some of this material from the drafting dept where I used to work. I clip it directly onto the spotlight for circuit board photography.

https://www.inventables.com/technologies/light-diffuser-film-rolls
 

alm

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #52 on: September 24, 2013, 03:40:17 pm »
Taping a piece of paper to the light will do very little, especially if it has a decent reflector. Softness of the light will depend on the size of the light source as seen from the object. The sun is huge, but a relatively hard light source because it's so far away. A softbox or umbrella, as used by a professional portrait photographer, very close to the object produces very soft light. A piece of paper the size of the reflector will do very little to increase the size of the light source. You need a relatively big diffuser (think softbox) or reflector to get soft light.
 

Offline Otatiaro

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #53 on: September 25, 2013, 02:16:31 pm »
Hello,

Ok I just played with the Magnus HD ZIP on my desk. Short conclusion : won't buy it.
The image quality is not that great especially when you zoom in.

The product itself is very good, simple, easy to use (the manual focus is nice to have), but not as good as I expected.

The good point is there is no delay at all, tested with my camcorder at the same time, the Magnus is faster, with the camcorder you can feel a slight delay. I still have to test with an iron if this is a problem or not.

Anyway, they have quite good binoculars in their catalog, might probably go that route and keep the camcorder on the arm for some usages.

He also talked to me about the Metcal soldering irons ... seems nice, next time he'll bring one for me to test.

Thomas.
 

Offline EEVblog

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #54 on: September 25, 2013, 02:19:18 pm »
Ok I just played with the Magnus HD ZIP on my desk. Short conclusion : won't buy it.
The image quality is not that great especially when you zoom in.

I didn't see any image quality issues in my quick test.
Were you able to test the field of view in mm at full zoom?
 

Offline diverger

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Re: EEVblog #521 - Picoscope 5000 USB Oscilloscope Teardown
« Reply #55 on: October 19, 2018, 02:28:59 am »

Taking a look at the DC input, it seems they do not directly connect the input ground to the system ground, but go through some filtering.

Can anyone help guess what the two blocky devices are (they look like chokes) but im not sure about the 2nd one.

DC jack --> series L --> shunt C  --> Common mode choke  -> larger shunt C ? -->  ??? (no idea whats going on here)

Regards

I also want to know what is it. It seems a big choke. But I can't find the model of it. Can anyone confirm this?
 


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