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Devantech SP03 Speech Synthesizer


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Make your robot talk! This speech synthesizer can remember up to 30 phrases with a total of 1925 characters. Repeats a given phrase in response to a simple command from your microcontroller. Interfaces easily with the Mark III or your own robot design. Comes completely assembled - this is not a kit.

Built-in speaker and speech synthesizer chip forms a complete text-to-speech solution which can be controlled via a serial connection, a parallel connection, or an I²C bus. Comes with a Windows application to configure the speech volume, pitch, speed, and stored text - these parameters can also be controlled directly from a microcontroller.

This item can be connected directly to a USB port on your computer using the optional USB to I2C Interface Module.

This product is made by Devantech. More information, applications, and code samples may be found on their web site.



A complete description of the SP03 pinouts, communications protocols, example code for various platforms, and samples of the speech output can be found on Devantech's web site: A Windows-based helper application, used to configure the SP03 and download pre-set phrases from your PC, can be downloaded directly from Devantech:
Voltage: 5V only Required
Current: 35 mA Standby, 60-100 mA Speaking.
Synthesizer: Winbond WTS701EM/T
Control 1: RS232 interface to PC (38400 baud)
Control 2: I²C interface for easy wiring to Microcontroller
Control 3: 5-pin parallel input port
Stored Speech: 30 phrases with up to 1925 total characters
Text to Speech: Unlimited via RS232 or I²C interfaces
Speaker: 40mm Speaker built in
Amplifier: 325mW LM386 on board
Small Size: 1.57 x 1.57 x 0.65 in.
40 x 40 x 16.5 mm