Water mark detection music pen

Abstract

The invention provides a water trace detection music pen. The water trace detection music pen comprises a pen body and a control module. The control module comprises a single-chip microcomputer, a control circuit and a touch control point. The control circuit comprises a one-from-multiple analog switch and a plurality of parallel channels. A midi controller is pre-arranged in the single-chip microcomputer. Steps are as follows: (1) a conductive substance is drawn on a non-conductive surface as a water trace; (2) a user touches a touch control point with a finger of one hand and touches the water trace with a finger of the other hand; (3) the resistance of the human body and the resistance of the water trace are detected and matched with all channels, the most approximate resistor is selected as a loop path, and the water trace resistance resolution is obtained; (4) voltage changes are detected in real time according to the movement of the finger on the water trace to obtain the changevalue of the resistance of the water trace through conversion, and corresponding notes are matched in the midi controller according to the change value of the water trace resistance; and (5) sounds are simulated according to the notes. The water trace detection music pen can be used in a plurality of ways with joy.

Description

technical field [0001] The invention relates to the technical field of electronic products, in particular to the aspect of electronic musical toys. Background technique [0002] Traditional electronic musical instrument toys, such as electronic pianos, electronic music percussion pads, etc., all use specific physical buttons to press and pronounce, so as to achieve the effect of playing music. The way of pressing physical keys has existed since traditional musical instruments, and people have defaulted to the way of pressing physical keys in the way of playing musical instruments. However, the traditional way of playing requires more physical keys, so more SCM detection ports are required, which is a factor that has a great influence on cost-sensitive toys and greatly increases the price of the product. In addition, the traditional way of playing makes too many products that use physical physical buttons bulky and inconvenient to carry. [0003] Therefore, the current use ...

AI Technical Summary

Problems solved by technology

However, the traditional way of playing requires more physical keys, so more MCU detection ports are required, which is a factor that has a great influence on cost-sensitive toys and greatly increases the price of the product.

In addition, the traditional way of playing makes too many products that use physical physical buttons bulky and not easy to carry

Images