How Desire Paths can Transform your Branding and Public Relations
How Desire Paths can Transform your Branding and Public Relations
5 Steps to Creating Successful Ads

Tiny Tapeout 4: A PWM Clone Of Covox Speech Thing [Video]

Categories
Integrated Solutions Offering

Tiny Tapout is an interesting project, leveraging the power of cloud computing and collaborative purchasing to make the mysterious art of IC design more accessible for hardware hackers. [Yeo Kheng Meng] is one such hacker, and they have produced their very first custom IC for use with their retrocomputing efforts. As they lament, they left it a little late for the shuttle run submission deadline, so they came up with a very simple project with the equivalent behaviour of the Covox Speech Thing, which is just a basic R-2R ladder DAC hanging from a PC parallel port.

The computed gate-level routing of the ASIC layout

The plan was to capture an 8-bit input bus and compare it against a free-running counter. If the input value is larger than the counter, the output goes high; otherwise, it goes low. This produces a PWM waveform representing the input value. Following the digital output with an RC low-pass filter will generate an analogue representation. It’s …

How Much Traffic do you Really Need?
How Much Traffic do you Really Need?
12 Steps to Create Videos