Circuit Project Electronic

Specifications
Frequency range 0.95 Hz to 105 KHz in five decade ranges.
Waveforms
Sine, Triangular and Square.
Output amplitude
Adjustable from 10 mV PP. to 10 V PP
Output impedance 50 ohms.
Sine wave Amplitude Flatness +/- 1 dB
Sine wave THD
* Less than or equal to 0.8% from 10 Hz to 10 KHz
* Less than or equal to 2.5% from 1 Hz [...]

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This is circuit Function Generater,Triangle and Squarewave Generator. Use IC 40106 and Transistor BC547.
VR1 For Control frequency Output.
S3 to Seclector High = 1kHz-10kHz, Low = 10Hz-100Hz.
Voltage supply 3-15V.
Detail other see in circuit.
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Squarewave Oscillator by IC [...]

IC1 astable gives a fixed square wave at pin 3, C1 and R1 derive uS trigger pulses from IC1 and this will trigger IC2 monostable or single shot, the voltage at pin 5 of IC2 will change the pulse width output of IC2, to get it working all the three RC combinations have to be [...]