1 Set DDS Function Signal Generator Sine Square Triangle Sawtooth Wave Low Frequency with Shell  Introduction:  Function (waveform) signal generator. It can produce some special periodic time function waveforms (sine wave, Fang Bo, triangle wave, saw tooth wave and pulse wave, etc.), the frequency range can be from a few micro he to tens of MHz function signal generator in the circuit experiment and equipment detection has a very wide range of uses. So the learning and design circuit will also be used to.  DDS signal generator parameter:  The frequency range of 1HZ-65534Hz is: DDS. (almost no distortion, the enlarged part of the TL082)  High speed (HS) Fang Bo: 1MHZ/2MHZ/4MHZ/8MHZ signal;  The offset amplitude of the DDS signal can be adjusted by two potentiometer;  DDS signal: sine wave, square wave, saw tooth wave, reverse zigzag wave, triangle wave, ECG wave and noise wave.  1602 LCD LCD screen;  Intuitive 5 keyboard.  Step frequency: 1, 10,100,1000,10000Hz;  Automatically recover the last time after power supply.  Offset: 0.5pp-5Vpp  Amplitude: 0.5Vpp-14Vpp  Output impedance: ohms 20-200  Power Supply:DC 9V