LCD liquid crystal display monitor module; Step-by-steps the motor control module; Monolithic integrated circuit serial communication module; Electric piano module; Digital voltmeter module; Miniature printer module; Multi-purpose recognition technology and so on. Stressed that easy to study the nature and the usability, each module has the complete procedure and the circuit diagram, the detailed annotation, the very suitable beginner to cross the threshold and to enhance. As a result of the time reason, this time only makes the first 4 modules.

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