24-08-2018, 03:30 AM
Whilst the MT3608 is not a bad device, some of the stupidly cheap eBay boards using it may have compromised performance due to component choice. The DSO138 only needs 150mA.
The data sheet is pretty explicit about this - it'd be interesting to know what diode they're using and the quality of the capacitors and inductor.
If the components are indeed good, then the converter should work well...
Note that there are a lot of fake DSO138s around - the originals are made by JYE Tech - see https://jyetech.com/Products/LcdScope/e138.php
It may be an issue with the DSO itself... As Mark says, first thing is to eliminate the boost converter...
The data sheet is pretty explicit about this - it'd be interesting to know what diode they're using and the quality of the capacitors and inductor.
If the components are indeed good, then the converter should work well...
Note that there are a lot of fake DSO138s around - the originals are made by JYE Tech - see https://jyetech.com/Products/LcdScope/e138.php
It may be an issue with the DSO itself... As Mark says, first thing is to eliminate the boost converter...
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