🚀 go-pugleaf

I'm trying to build _cheap_ X10-like modules for controlling loads in
a new house.  I'll be dropping dedicated cable, so I'm planning to use
RS-485 interfaces to a MC14469 (addressable async rec/trans).  I'd like
to use the 7-bit parallel output of the 14469 to drive two dimmers in
some modules.

I was thinking that the easiest way to do this is to run three lines
to each (of two) counter's inputs so that when reset they load this
value.  A clock of 60*2*2^3 Hz would drive the counter, and reset
would be provided by a zero-cross detector built in to the remote power
supply.  (Cut power at zero cross, but have modules run off of local
capacitors.)  The overflow output would then drive a triac.

In operation, VCC for the module would go low (indicating that a zero
cross has been detected) resetting the counter (but not the entire
module since it's running off of a capacitor), at reset the three bits
present from the network interface would be loaded and the overflow
cleared.  This would turn off the triac.  When the count overflows, the
triac would be turned on until it detects zero cross.  At zero cross,
the cycle repeats.

So...will that do it?  Can I easily get a zero cross detector built in
to the triac (instead of having it done remotely)?  Can I reduce or
eliminate the buzzing I associate with these dimmers?

Thanks for the help!

--kyler