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June 26, 2020

led dot matrix writing display

This article introduces the LCD dot matrix writing display in detail, from the hardware schematic diagram to the applied chip and circuit. The design hardware of LED display is mainly composed of the minimum system of STC89C58 single-chip microcomputer, 32 & TImes; 32 two-

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June 21, 2020

3G wireless network indoor coverage transfer direction

This year, 3G development has entered a blowout period. Operators are striving for data services. In particular, indoor networks need to ensure the ability to provide 3G services. Data service bandwidth and quality assurance have become the core of indoor network coverage and

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June 21, 2020

50MHZ RF bridge schematic

The bridge is used to measure the 50MHz amateur radio antenna. R1 is a 500M miniature wire potentiometer. The position impedance is compared with the 51M resistor R2. The bridge needs an external signal source. 50MHZ RF bridge principle diagram: Accordin

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