Retrocomputer enthusiast Yeoh Kheng Meng has made a clone of the classic Covox Speech Thing device, which connected to a computer and allowed digital sound playback.
Unlike the original version, however, his device runs on a proprietary silicon chip custom-made by Tiny Tapeout.
Meng's project is designed to replicate the functionality of the 1987-made Covox Speech Thing device. Meng used pulse width modulation (PWM) to recreate the device.
The resulting board was tested with both a modern system using an ExpressCard parallel port adapter and a vintage system running MS-DOS 6.22. Meng expressed delight that his design worked as he expected, using only electronic circuitry that did not require microcontroller firmware or FPGA bitstreams.
Yeo Kheng Meng was able to replicate the functionality of the original device by using pulse-width modulation instead of a digital-to-analog converter. The resulting board was tested with a variety of systems, and Meng expressed his joy at the success of his design.
Meng's project is designed to replicate the functionality of the 1987-made Covox Speech Thing device. Meng used pulse width modulation (PWM) to recreate the device.
The resulting board was tested with both a modern system using an ExpressCard parallel port adapter and a vintage system running MS-DOS 6.22. Meng expressed delight that his design worked as he expected, using only electronic circuitry that did not require microcontroller firmware or FPGA bitstreams.
Yeo Kheng Meng was able to replicate the functionality of the original device by using pulse-width modulation instead of a digital-to-analog converter. The resulting board was tested with a variety of systems, and Meng expressed his joy at the success of his design.