answer to cheep advance question

[xxalexx at ix.netcom.com]

You could use the PIC12C671 to reduce pin count from 40 to 8
10 MHz built in oscillator, 4 A/D, 6 I/O.
alex
> Looks like here is a list of modifications, for one thing the knock sensor
> will be of little use without some sort of tunable device or ability to
> adjust the sensitivity etc. Must have several options for trigger,
> reluctor, mag, led. Keyboard and display can go, how about a rs232 port and
> use the rest of the I/O for something useful, A/D or what ever.
>