Author: 360customs

USB "SainSmart DDS120" 2-channel oscilloscope 20 MHz 50Msps (Buudai/Rocktech BM102) 2

USB "SainSmart DDS120" 2-channel oscilloscope 20 MHz 50Msps (Buudai/Rocktech BM102)

For approximately € 50 (10.09.2014) SainSmart offers a 2-channel USB oscilloscope with 20 MHz of analogue bandwidth and maximum 50Msps (mega samples per second). Identical models are the "BM102" by Rocktech/Buudai. Read the technical data is as follows: interface USB 2.0 channels 2 calibration signal...

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18650 battery tank (mobile battery)

There are battery tanks (mobile battery) in different sizes and styles. Equipped with (at least) a lithium ion cell (E.g. 18650) they deliver 5V at output (for.5A). A charging circuit are integrated (CV/CC procedure), a Step-Up Converter as well as a protection circuit against deep discharge. The latter is...

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Upper surface roughness of a 250 GB platters

It scans a 250 GB platter with the laser scanner, the following picture emerges. The "Roughness" or amplitude is in the range -0 1µm. However, has dust according to definition a particle size of 2.5 10 µm, thus 25-100 is greater. This is one reason, among others...