Vbe 203: Zoyi ZT-702S full test and teardown

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Published on Oct 12, 2024
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In this video I do a complete test of the Zoyi ZT702S multimeter-oscilloscope and do its complete disassembly. Will it survive the high voltage tests? Check it out! Related Videos: Vbe 169: Zoyi ZT-702S Digital Oscilloscope and Multimeter - First Impressions • Vbe 169: Digital Oscilloscope and Multim... Vbe 170: Green Fuel AD20001G 150W Car Inverter Test and Teardown • Vbe 170: Green Fuel AD20001G 150W Car Inverter Test and Teardown... Product Page: Zoyi ZT702S - also Bside ZT-702S, Aneng AOS02, Richmeters 702S https://zoyitools.com/product/zt-702s/ Components: Artery AT32F403A Microcontroller - 240MHz Cortex M4, 1MB Flash, USB, LCD Controller https://www.arterychip.com/download/D... Ruimeng MS9280 A/D Converter - 35MSPS, 10-bit https://www.relmon.com/en/index.php/l... AD8091 Operational Amplifier - 110MHz GBW https://www.analog.com/en/products/ad... LM321 General Purpose Operational Amplifier https://www.ti.com/product/LM321 DM1109 - 10000 count multimeter IC (datasheet not found) ICL8069 - 1.2V voltage reference https://www.renesas.com/en/document/d... Awinic AW21009 - RGB LED driver https://www.lcsc.com/datasheet/lcsc_d... Teardown photos by Dave Jones (@EEVBlog) https://www.flickr.com/photos/eevblog... Chapters: 00:00 Introduction 03:01 Operational Summary 05:50 AC and DC Voltage 06:29 Resistances 10:36 Continuity 11:24 Diodes 12:45 Capacitor 14:48 AC and DC Current 16:11 Input Detector 16:33 Bandwidth 17:48 Frequency Meter 21:20 Disassembly 24:09 Multimeter Circuit 31:09 LiIon Battery 31:20 Display Side 33:22 Removing the Display 35:26 The Analog Stage 40:40 High Voltage Tests 46:38 Conclusion

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