How to make the UM66T melody generator circuit

-
HOW TO MAKE THE UM66T MELODY GENERATOR CIRCUIT

The electronic circuits are used to get alarm sounds to attract human attention. From a long-time ago electric bell, alarm circuits, and buzzers were used to draw human attention and those devices are limited to one type of tone. Sometimes alarms are not appropriate to the installed location and the purpose in which it has been used. Presently circuits are used melody generators to make a suitable sound. The UM66T Integrated Circuit is a common melody generator. This Integrated Circuit is based on CMOS LSI design and its melody is stored in 62-note ROM (1) memory. (note: The IC ROM size is changed according to its manufacturer.)


UM66T,FT66T,BT66T,UM66T IC Pin Diagram


UM66T Integrated Circuit has a series of packages. According to your project, you can select a suitable IC Package for your circuit. The packages available song series are listed in the following table.
UM66T melody table


According to manufacture, it has code variations such as UM66, FT66, and BT66. I am using FT66T19L for this demonstration. According to the table, it plays the For Elisa melody. You can select a suitable IC according to your requirements.

IC's suitable supply voltage is 1.5V to 3.3V. We need two numbers of 1.5V batteries are required to power up this ic. Pin number three is the melody output terminal and its output is limited to 2mA. This melody IC needs an amplifier stage If you need the speaker output. Diagram 1 is used for level hold mode for low power piezo. Diagram 2 is used for level hold mode for the speaker. The switch used in the diagram is normally an open switch (SPST-NO on-off switch) for level holding mode but I used push-button switch for my demonstration. Therefore the push-button is needed to hold on to play the melody. Then select switch according to your requirements.


UM66T level hold mode circuit diagram for piezo



UM66T solderless breadboard circuit



•       Item list for the first circuit

    1. UM66T19L (Equivalent FT66T19L or BT66T19L) IC   - 1
    2. Solderless Breadboard   - 1
    3. Piezo Transducer Plate or Piezo Transducer with Plastic Cover (with wires)    - 1 
    4.  Micro Momentary Tactile Push Button Switch (4 Pin, SPST)   - 1
    5. Two 1.5V Batteries With Battery Holder   - 1
    6.  Jumper Wire  - 1m


UM66T level hold mode circuit diagram for speaker
UM66T solderless breadboard


•       Item list for the second circuit

    1. UM66T19L (Equivalent FT66T19L or BT66T19L) IC   - 1                      
    2. 2SD400   -1
    3. 1K Resister  (Brown, Black, Red)   - 1
    4. 0.1uF, 10V Electrolytic Capacitor   - 1
    5. Solderless Breadboard   - 1
    6. 8 ohm , 0.5W Speaker   - 1
    7. Micro Momentary Tactile Push Button Switch (4 Pin, SPST)   - 1
    8. 1.5V Battery   - 2
    9. 1.5Vx2 , AA Type Battery Holder   - 1
    10.  Jumper Wire  - 1m

 Appendix


solderless breadboard



Reference

•Ref 1
UM66T Series, Simple Melody Generator, UMC Corporation.
•Ref 2
UTC UM66TXXL, MELODY INTEGRATED CIRCUIT, UTC UNISONIC TECHNOLOGIES CO., LTD., QW-R501-001, D.
•Ref 3
FT66T-xx, SIMPLE  MELODY  GENERATOR,  FORTECH ELECTRONICS COMPONENT.
•Ref 4
BT66T, SIMPLE MELODY GENERATOR, FORMOX SEMICONDUCTOR

Thank you.







Comments

  1. CJMarch 9, 2020 at 5:17 AM

    Vert simple and useful guidance

    Keep up the good work!

    ReplyDelete

Post a Comment

Popular posts from this blog

How to make a simple LED flip-flop circuit

-
Image
This is the second solderless breadboard project on the channel. The previous project introduced the um66 integrated circuit and demonstrated how to build that simple circuit on the solderless breadboard. This project is further demonstrating how to make a multivibrator circuit on the solderless breadboard. Figure 1 is the schematic diagram of the multivibrator circuit and figure 2 is the pictorial diagram of the circuit. Figure 1 If you have difficulty making a circuit by using a schematic diagram. Getting a pictorial diagram help to fix the circuit on the project board.  You can install electronic components on the breadboard according to the graphical drawing components are attached. Figure 2      Item list for the multivibrator circuit. 100Ω Resisters (Brown, Black, Brown)  - 2 10KΩ Resister (Brown, Black, Orange) - 2 5mm Red Colour LED - 2 100µF, 10V Electrolytic Capacitors - 2 BC547 Transistors - 2 Solderless Breadboard - 1 1.5Vx2, AA Type Ba
Read more

How to make the UM3561 siren sound generator

-
Image
The UM3561intergrated circuit is based on a low-power CMOS LSI design. It is included programmed mask ROM to generate three siren sounds and machine-gun sound.[1][2] Its siren type depends on SEL1 and SEL2 pins voltage levels. The required voltages of IC playing modes are listed in table 1. The typical operating voltage is 3V and its operating voltage range is 2.4V to 3.6V.[1][2] IC operated by an RC oscillator and it needs to fix to the external resistor. The resister pins should be fixed in between OSC1 and OSC2 pins of the UM3561 IC.[1][2] Figure 2 is the three sound application circuits. (1: Police Siren, 2: Fire Engine Siren, 3: Ambulance Siren)It has a three-position toggle (ON-OFF-ON) switch to select the siren sound and a sliding switch is used to power up the circuit. You can select a suitable type of switch according to your required application in your project. ( eg.you can use the Push-button switch for momentary situations) Required item list for th
Read more