Speaking Wall Art: Difference between revisions
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Grey - Miscellaneous Wiring<br /> | Grey - Miscellaneous Wiring<br /> | ||
White - Clock Line Wiring | White - Clock Line Wiring | ||
= Random Information = | |||
* Application note used is dated 1986 | |||
* The SPO256 chip recieves parallel data from the address lines in this implementation | |||
* The text to speech algorithm used in the CTS256 chip was developed at Naval Research Labs in the 1970's | |||
* The External EPROM is "erased" by UV light, ambient room light will cause problems after (alot of) years | |||
* The application note has a different Parallel Panel schematic than the one supplied with the CTS256 chip | |||
* Parallel Panel has Eight Data and Two Control pins mid board edge and break the aesthetic | |||
* The 3.12 Mhz Crystal for the SPO256 is difficult to get, so this implementation uses a 3.2 Mhz Crystal | |||
* JAC_101 has sworn not to do another project with the SPO256 chip, because he is out of them | |||
= Panel Breakdown = | = Panel Breakdown = | ||
Latest revision as of 11:35, 19 April 2012
Construction
Nine Panels of Vero Stripboard
Eighty One Strips Horizontal
Dimensions
Length 28.5 inches
Height 8.5 inches
Depth 0.75 inches
Wiring Color Code
Green - Eight Line Data Bus
Yellow - Twelve Line Address Bus
Blue - Twelve Control Data Lines
Orange - Eight Chip Select Lines
Brown - Six Serial and Parallel Control Input Lines
Red - Five Volt Positive Power
Black - Ground Power
Grey - Miscellaneous Wiring
White - Clock Line Wiring
Random Information
- Application note used is dated 1986
- The SPO256 chip recieves parallel data from the address lines in this implementation
- The text to speech algorithm used in the CTS256 chip was developed at Naval Research Labs in the 1970's
- The External EPROM is "erased" by UV light, ambient room light will cause problems after (alot of) years
- The application note has a different Parallel Panel schematic than the one supplied with the CTS256 chip
- Parallel Panel has Eight Data and Two Control pins mid board edge and break the aesthetic
- The 3.12 Mhz Crystal for the SPO256 is difficult to get, so this implementation uses a 3.2 Mhz Crystal
- JAC_101 has sworn not to do another project with the SPO256 chip, because he is out of them
Panel Breakdown
| Front Image | Text Description | Fritz Image |
|---|---|---|
|
SPO256-AL2 Voice Synthesizer IC | 
|
|
Audio Amplifier based on LM386 | 
|
|
CTS256A-AL2 Text-To-Speech Controller IC | 
|
|
System Function Selection with Decoder/Demultiplexer (74LS138) and HEX Inverter (74LS14) | 
|
|
Data and Address Bus Exchange with Latch (74LS373) | 
|
|
External RAM (TMS4016-25) Buffer For Text Conversion | 
|
|
External EPROM (2732A-70) For Custom Text To Allophone Conversion | 
|
|
Serial Data Transfer Configuration Module with Latch (74LS373) | 
|
|
Parallel Data Input Option with Octal Latch (74LS374) and D-Type Flip/Flop (74LS74) | 
|
|
|
Full Panel From Application Notes |  
|
Prior Implementations:
http://wiki.lvl1.org/Speech_Synthesizer,_Now_from_the_Past
http://wiki.lvl1.org/Text_to_Speech_Synthesizer
And what will this device be speaking for: