Space Invader Sounds Part 2 - The SN76477

In this video I continue the series started with

and have a look at the Retro Audio SN76477 Complex Sound Generator IC from Texas Instruments.

The kicad files are here:

and the documents are on google drive here

0:00 Intro and SN76477 description
0:50 Source documents
1:48 Block diagram and SN76477 capabilities walkthrough
4:44 Examples walkthrough
5:11 The classic UFO sound from Space Invaders
7:53 UFO sound on the breadboard
9:36 Attack and Decay Envelope control
11:42 Attack/Decay on the Breadboard
14:15 Noise Generation
16:11 Noise Generation on the Breadboard

[IanSlothieRolfe]

Well that brought back some memories. I didn't realise that the Space Invaders machines had any sound effects that weren't analogue. I've been looking at generating sounds by synthesis in an ESP or arduino, and Youtube recommended this video - so for once the algorithm is working! Think I'll be checking out your other videos, I like the way you're using KiCAD to show the circuits. About 15 years ago I spent a lot of time experimenting with analogue synthesiser circuits, so this and the previous video were also a bit of a nostalgia trip. You never know, one day I might actually make that synthesiser I've thought about all these years!!!

[TheEmbeddedHobbyist]

I liked the 14 pins each side description of a 28 pin chip. love the old school sounds, they are the sounds of my late teens.