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How to promote an USB oscilloscope to individual engineers? I am the Loto instru
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Simon:
Sort your website first and then send the product to Dave to review, once he reviews it your website may get quite a bit of attention and Dave will likely visit during the review.
nctnico:

--- Quote from: jiangtao.lv on January 27, 2019, 04:47:12 am ---Hi ,Rerouter .Thank you for you suggestion.
Yes,it can used on any computer with windows ,especially for win8,win10, on which do not need driver installation.but you need a appliction software.

--- End quote ---
Windows only? Fail... many engineers use Linux nowadays. Even the big CAD software makers like Altium and Cadence are porting their products to Linux. Also many people use Windows XP or Windows 7. Make sure it works on Windows XP at least for maximum compatibility.
jiangtao.lv:
Yes, it works on Win xp,Win7,WIN 8 ,WIN10, but not support linux. We had a team for linux ,but I did not pay their attention to this product, they do embedded computers for industry.It will also can work with Android on phones, but will takes some more time , I put a sample photo in attachment.
trobbins:
Lots of Androids around that could use a low power hardware interface via USB OTG.  One less chance for mains hum to ingress if just Android battery is used.
jiangtao.lv:
Hi, trobbins:
I agree with you in theory, but in fact,  I used a isolated DC-DC module on the board to supply a +-5V power for the analog chips. So I think the noise level of the whole circuit may depend on the performance of this power module.

I attach the HW board pictures here. The power module is pointed by a red arrow.

the result (zero-input noise)is:
±50mv ----1v/div selector ----±5V input range
±25mv ----500mv/div selector ----±2.5V input range
±10mv ----200mv/div selector ----±1V input range
±8mv   ----100mv/div selector ----±0.5V input range
±4mv   ----50mv/div selector ----±0.25V input range
±2mv   ----20mv/div selector ----±0.1V input range
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