The IC circuit utilizes the principle of digital memory.
The digital signal and program which cannot be changed is put in IC produced from the IC factory.
The voice is imprinted on to the IC
These are very easy to make.
Technical specifications:
- power supply: 3VDC or 12VDC (select jumper)
- consumption: 75mA max. at 3VDC
- dimensions: 1.21 x 1.77 inches.