IF you are electronic? I recommend this TESTER + component tester + handheld oscilloscope for beginners studying electronics, robotics and more...
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Here the DSO-TC3 instrument:
✅ https://s.click.aliexpress.com/e/_on3rgoQ
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00:00 a good instrument for an electronic novice
00:43 the instruments and their versions
02:02 electronic components tester
06:06 review Zener diodes
07:33 How to use the oscilloscope here?
09:54 you can use CONTINUITY AND VOLTMETER
11:10 has an infrared control decoder
11:51 in conclusion of the instrument
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Cochabamba - Bolivia