Various waveforms generator

Published:2011/4/20 21:27:00 Author:Ecco | Keyword: Various , waveform , generator | From:SeekIC

The circuit shown as the chart, it can produce square wave, triangle wave, sine wave and output at the same time, it is especially for the electronic hobbyist or student to do oscilloscope waveform observation experiments. The signal generator circuit is simple, low-cost, easy to adjust. 555 timer connecting as a multivibrator, C2 is the timing capacitor, the charging circuit of C2 is R2 → R3 → RP → C2; C2 discharging circuit is C2 → RP → R3 → pin 7 of IC (discharging tube). The value of R3 + RP is higher than R2, so the charging and discharging time time constants is approximately equal, the pin 3 of IC outputs an approximately symmetrical square wave. Device parameters are as shown, the frequency is about 1kHz, adjusting potentiometer RP can change the oscillator frequency. Square-wave signal becomes triangular wave by the R4, C5 integration network. Triangle wave becomes sine wave by R5, C6 integral network. C1 is the power supply filter capacitor . The light-emitting diode VD is used as power indicator.



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