The diagram above depicts the proposed musical door bell circuit the various stages may be understood with the following explanation. In many cases a doorbell that sounds off a musical tone is preferable over the common buzz sound.
He 0140 Musical Doorbell Circuit Free Diagram
Musical doorbell circuit diagram. Musical doorbell circuit diagram. Get free shipping on qualified musical doorbell chimes or buy online pick up in store today in the electrical department. After the button s1 is pressed a short melody is played. Musical doorbell circuit diagram. When s1 is released opened the register runs until the capacitor c1 gets discharged through r2. When the button is pressed many times in rapid succession or pressed longer a different melody is generated and the melody plays longer.
The straightforward design of a musical doorbell explained here can be easily built and installed in your house. Connect the input wires on the transformer to the source circuit using the black to black white to white and ground to green method. 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 tonesthis multi tone door bell circuit produces 12 types of musical toneyou get twelve popular tones in sequences that gives a new dimension to musical door bells. Wiring for two doors is the same as for one with the transformer hardwired to the 120 volt source from a house circuit. The circuit is equipped with some outstanding features like interchangeable music chips acdc operation and audio period time adjust facility. This featured circuit is a musical doorbell.
The timer the monostable multivibrator and the tone generator stage. It is intended for applications such as toys door bells music boxes melody clocktimers and telephones. Wiring diagram for a two chime doorbell. When s1 is again pressed closed the capacitor c1 stays charged causing the musical bell to play continously. This musical doorbell circuit uses um3481 a series ic. The circuit basically comprises three stages viz.
The bc547 transistor along with the associated preset and the 100uf capacitor form a simple delay off timer circuit where the preset and the capacitor determines the delay for which the sound output may be sustained once the indicated push button is pressed.
Gallery of Musical Doorbell Circuit Diagram
