Abstract: In a design methodology for an electronic device that accepts a removable accessory card, the electronic device is provided with an accessory card receptacle and a power connector. The power connector is positioned with respect to the accessory card receptacle such that an accessory card cannot be inserted into, or removed from, the accessory card receptacle while a power cord is connected to the power connector. An accessory card, and electronic devices that receive accessory cards, are also disclosed.

Abstract: In a design methodology for an electronic device that accepts a removable accessory card, the electronic device is provided with an accessory card receptacle and a power connector. The power connector is positioned with respect to the accessory card receptacle such that an accessory card cannot be inserted into, or removed from, the accessory card receptacle while a power cord is connected to the power connector. An accessory card, and electronic devices that receive accessory cards, are also disclosed.

Abstract: A sound enhancing insert for stringed instruments in general and for guitars, in particular. The insert is readily mountable between the string supporting bridge saddle and the string tie-down members without repair, alteration of, or replacement of instrument parts. One or more rigid members, constructed of metal, wood, rigid plastic or ceramic, are mounted with a top surface of the rigid member contacting a respective string and the bottom surface of the rigid member contacting the sound table of the instrument. The rigid members are preferably mounted within a pliant soft plastic material such as Neoprene for supporting the rigid members in place and making the insert adaptable to different string heights. The rigid members, in their engagement between string and sound table, provide a second reverberation signal, a change in sustain, and a change in timbre, depending upon the particular material used.