@Vernon Barry posted:Nope, LM386 on the backside of the board (surface mount version of the LM386).
FWIW, K-line, Williams, maybe others, oh yeah, and drumroll- Aristo-craft all used those sound chips that I have put hands on.
Elan EM57P300CPS audio chip one time programmable.
And yes, you can swap them to try different sound sets depending on who and what was programmed into them.
Example in that aristo-craft live steam swap with a Williams steam chip
Very interesting. I did not know that K-line and Aristo used Elan. The Williams stuff I did know about because of TBII. The later TBII used a downgraded copy of my circuit and maybe that's where you see the Elan chip (Sanda Kan copied my circuit). I used the Elan IC in the first pass before using glob top die. I did not use the IC you specified (57P300).
Atlas had a sample from Elan for their trainman series but had BK and me design that circuit for them.
Additionally I will note that Elan's OTP had a programming failure rate of 50%.
I mentioned previously Techno-Mind. Their president Ken Tong came in one day and emptied the bank accounts and was never seen again.
Probably more than you wanted to know.
Lou N
