Voice signals are continuous analog signals and the analog circuits or systems can only handle the voice signals without changing their continuity feature. There come situations in which the analog voice signals need to be applied as the input to simple digital microcontrollers. The digital devices like microcontrollers cannot handle the continuous analog signals. Most of the microcontrollers have an ADC module which can do analog to digital conversion. The microcontroller uses sampling technique to convert the continuous analog signals to discrete digital equivalent samples.
Fig. 1: Block Diagram of GR Sakura based Voice Sampler
Fig. 2: Circuit Diagram of Microphone Amplifier
GR Sakura and Loudspeaker Driver
Fig. 4: Circuit Diagram of GR Sakura based Voice Sampler
Fig. 5: Prototype of GR Sakura based Voice Sampler