This design utilizes the key control of the STC chip and the principle of timer overflow interrupt control frequency to achieve the purpose of outputting square wave signals of different frequencies when each key is pressed. This circuit board can be connected to audio equipment with an AUX cable to achieve the output effect. Press the SW key to go up an octave, and the knob can adjust the output volume.
All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.
It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.
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