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This is a Function Generator made with STC MCU. Need only several components and the circuit is simple.

Specification
Output: Single Channel
Square Waveform Frequency: 1Hz~2MHz
Sine Waveform Frequency: 1Hz~10kHz
Amplitude: VCC, about 5V
Load ability: Not available
MCU: STC15W4K32S4 @24MHz
Display: LCD1602
Controller: EC11 Encoder”

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