AC power on front panels

On 1/15/2006 at 8:59 AM Dave Brown wrote: h%20.pdf Very nice job, particularly using the grounded/earthed neutral as the return. Here in the USA, one side of the 120vac is tied to the third prong of the mains receptacle in the distribution panel, so this would also be a way to avoid tying into an incorrectly-wired receptacle (more common than you'd think!). Back in the bad old days of glass-enclosed active devices, a dodge for powering a single 6.3v 0.3a filament from the mains without a filament transformer was to use a 1.0 uf nonpolar cap as a dropping device. In that application, if the cap failed, the filament of the tube/valve would simply burn out. Perhaps a very small (7w) incandescent bulb might be used in your circuit in place of a 100 ma fluse. Would a common NE-2 neon also work as protection? It might be nice to use as a "this equipment is connected to the mains" indicator. Cheers, Chuck