[sdiy] New SDIY Guy Video: Oscilloscope Kit, DFAM, A cool film score patch and more

[Ben Bradley]

I looked, I presume this is the device. If not, it's a good example:
https://www.banggood.com/Orignal-JYE-Tech-DS0150-15001K-DSO-SHELL-DIY-Digital-Oscilloscope-Kit-With-Housing-p-1093865.html?cur_warehouse=USA

Scrolling down to the pic with the input BNC connector, there's text
on the device that says "Max 50Vpk." That is the actual maximum input
signal level the device is rated for. This reminded me of what I
already knew but was distracted by the "20v max" claim, that the scale
setting has no relation to the max input voltage.

The "20v" setting is just a scale setting, it means 20 volts per
division. On a "full size" scope screen each division is 1 cm and
there are 10 vertical divisions, 5 above and 5 below the center zero
line.. I'm guessing divisions on this display are 0.5cm, but
regardless, a 20V peak signal would only go one division above and
below the zero line on the 20V setting.

On Sun, May 6, 2018 at 3:28 AM, Quincas Moreira <quincas at gmail.com> wrote:
> I’m going by the visual range. In 20v setting my 10v bipolar signals look way small. They look good in the 2v setting. I’m thinking this is a scaling thing, maybe I’m wrong
>
> Sent from my iPhone
>
>> On May 6, 2018, at 00:45, rsdio at audiobanshee.com wrote:
>>
>> I’m curious: what makes you think that it can handle more than the manufacturer claims? They could easily be using parts with an absolute maximum of 20 V, which means that’s it. I wouldn’t recommend feeding it more voltage than they say it can handle.
>>
>> Brian
>>
>>
>>> On May 5, 2018, at 7:57 PM, Quincas Moreira <quincas at gmail.com> wrote:
>>> Just measured, the voltage range goes well beyond what's needed for modular. it says 20v, but I think that's wrong and it's way more. My VCOs look good in the 2v setting.
>>
>
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