12 tone door bell | Multitone Doorbell Alarm | How to Make Doorbell At home

12 tone door bell | Multitone Doorbell Alarm | How to Make Doorbell At home

  Listening same door bell  tune at always may be boring, this melody generator doorbell circuit may help us to avoid this dull situation because this circuit provides 12 tones. This multi tone door bell circuit produces 12 types of musical tone. You get  twelve popular tones in sequences that gives a new dimension to musical door-bells. Whenever a switch is […]