# Sound Generator

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#### rod

##### New Member
I am trying to source a piston engine sound generator for a model project. There is one on the net but it uses an HT2812A ic and I can find no source of supply for that item. Therefore, can anyone direct me to a supplier for that item or, recommend another ic based design for the project?

#### Gene

##### New Member
Seems like I read somewhere that the 2812 was a Soviet version of a 555 but I'm not sure at all. Perhaps you could post the circuit and someone could see the design idea and recommend a substitute.

Steve

#### Gene

##### New Member
steve is correct. I have seen the chip displayed I think as an 8-pin IC that produced oscellating sounds but I think the chip actually produces the sound and probably had an external circuit to make the output oscillate.

I also seem to remember reading on a model train forum about a circuit designed too produce the sounds of a steam engine and a whistle. I might even have a copy somewhere. Perhaps some of the model forums might have a schematic for the piston engine sound you want - using common parts. Good luck on this one.

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