Electronic dog whistle - high quality ultra-sonic dog call

6-30 — elektor june 1982 electronic dog whistle Some time ago a particular type of tweeter came onto the market ac- companied by an enormous amount of publicity such as "over 300 W" and "without a crossover network", etc. The "Hallelujah Chorus" of the advertising fraternity was convinced that it would take the world by storm. The piezo tweeter did not in fact receive the universal acclaim expected and as result they are still relatively cheap and easily available. The article is certainly not going to argue the pros and cons of this tweeter, let"s just say, that for certain appli- cations it is ideal. electronic dog whistle high quality ultra-sonic dog call Most if not all the circuits published in electronic magazines have always catered for other hobbies. During the last few years Elektor has designed numerous circuits for photographers, musicians, movie makers, model railway enthusiasts and so on. But, "where oh where" are the circuits for the dog owners of this country? Aft...