Posted on Jan 13, 2013

The circuit, a general-purpose system with many uses, vocalizes 59 allophones contained in the speech processor. After filtering and amplification, its pulse-code-modulated output can drive an 8-!l speaker. The processor`s address pins, Al to A6, define 64 speech-entry points. Closing the test switch to the NAND gate lowers its output, thereby loading an address and triggering the ALD input for an allophone cycle.

Click here to download the full size of the above Circuit.

The CD4520 dual binary counter, IC2, counts from 0 to 63 in binary code until its Q7 output resets it on the number 64 count. To generate a phrase, just add an EPROM between IC2 and IC3 that contains a program for a predetermined sequence of allophones.

Leave Comment

characters left:

New Circuits



Popular Circuits

Car Speed limit Alarm
Parametric SubWoofer Equaliser
Transistor Tester
High-Accuracy Thermometer
Window Comparator Circuit
DIY Single-Ended (SE) 6L6 / 5881 Tube Amplifier
Lx1995 Led Driver: Camera Flash Application
Triple Stroboscope
FET Audio Mixer
build your own geiger counter
Multimedia RIAA Preamplifier
Yves OESCH HB9DTX Transceivers modifications
Chemical mixer circuit
DF data transmission module and the super-regenerative receiver module
FET relay circuit 2
Fan motor starting circuit diagram