Re: trim buttons

[Gramin@aol.com]

Two  SPDT push buttons  (Fig. 4 of the MAC info.) gets away from the doubtful
rocker switch.  Furthermore if each is actually a DPDT, wiring the halves in
parallel give the redundacy needed to overcome dirty contacts. Doesn't guard
against sticking down  so you still need an isolate, but only one thing to
press at a time.  Pressing both by accident is safe .

Graham C.