[sdiy] TI 76477 Space Invaders sound chip detailed analysis

[Olav Martin Kvern]

Colleagues,

In the early 1980s I built a battery powered synth using the SN76477. I put up posters around Seattle with schematics showing how to build and use this folk instrument. I called it "Crude Instrument."

https://soundcloud.com/user4909220/crudeinstrument-1

https://soundcloud.com/user4909220/crudeinstrument-2

https://soundcloud.com/user4909220/crude-instrument-3

It had several clocks to connect to the select pins--by doing this, you could get several sounds at once. The controls were a joystick, a trigger button, three or four multi-pole switches, and several potentiometers. It was never quite clear what sound(s) you were going to get, but it was often interesting. And always crude.

It appeared in a few shows around the area. I have no idea where it is now.

Thanks,

Ole