All items tagged with phone and DC (3)

| It’s often the small, everyday things that turn out to have interesting features when you examine them more closely. In any case, here you c...

| elektor July/august 1985 Microphones, unfortunately, produce onlyasmallsignalandthey,therefore, require a special pre-amplifier to boost the...

| 12-40 — elektor december 1982 home telephone help used (see figure la) may differ depending on the type of tele- phone in use. If your sys...