Voice Changer Using AP8072

Voice Changer project can be used to transpose or distort one’s voice by encoding the sound appearing at the Microphone input.  This project  is built around AP8072 IC. Supply input : 6 VDC @ 200 mA  Output : Speaker, 8 Ω / 0.5 W  Audio amplifier type LM386 with volume control preset  Jumper selectable tone frequency for encoding sound  4

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3 Tone Musical Bell with Audio Amplifier

  3 Tone Musical Bell project is built around BT66T (UM66) IC driving LM386 audio amplifier to give that extra punch.   Input 6 VDC @ 200 mA Output 8 Ohms 0.5 W Speaker Terminal pins for supply voltage and speaker connection Power-On LED indicator Onboard push to ON switch Four mounting holes of 3.2 mm each PCB dimensions 35

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