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UM66 Datasheet Preview

UM66 Datasheet

Music Calling Bell

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Musical Calling Bell
By Kalyan Prodhan
www.kalyan-prodhan.tk
Connection Diagram
Component List with cost (Approximate)
Component Description (IC and Transistor)
Precaution
Modification for adaptation
Description:
This is the simplest ever musical calling bell that can be easily built. It uses the
musical 3 pin IC UM66 and a popularly known Transistor BC548b. The circuit
can be made even without soldering and the ideal for the first electronic project
for newbies. Here the musical IC UM66 generates the music when it receives
supply and drives a small speaker through a class c amplifier using silicon
transistor BC548b.
UM
66
Fig-1 : Connection Diagram
The connection diagram is shown below. The component details with cost is also with
this. The battery supply should be kept in a battery container to ensure the connection.
The volume of the sound of this circuit is so much that it can be used as a calling bell. If
anyone want to reduce the volume of the circuit then insert a resistance () in place of the
blue line connection. In this circuit please don't give the supply beyond 3 volt without
modification as the IC may got damaged. It is better that you should not run this circuit
in Eliminator as most of the available eliminator don't have a good filter built in and have
no precision over voltage protection. The circuit should not be run in Rechargeable
battery also if the Speaker resistance is less than 8 Ohm and may burn the Transistor.




ETC

UM66 Datasheet Preview

UM66 Datasheet

Music Calling Bell

No Preview Available !

www.DataSheet4U.com
Component
Sl No
1
2
3
4
5
6
7
8
Item
IC UM66
Transistor BC548b
Speaker 2”-4”
Wire for connection
Push butten switch
Battery
Battery Holder
Resistance
Specification
Cost
Three pin IC, like plastic case transistor. Rs. 6 to Rs. 20
Package code TO-222.
depending upon the
music and part code.
-same-
Rs. 1/- to Rs 2.5/-
depending upon the
make.
Speaker having diameter 2 inch to 6 inch Rs. 10/= to Rs35/-.
with 50gm to 200 gm magnate and the
resistance is more than 4 Ohm.
Any insulated wire. Five coloured wire can Each 1 M = Rs 2/- to Rs
be used.
3.5/-
Any type.
Rs 1/- to Rs 25/-
Any Dry cell battery, Alka;ine battery. Rs. 4.5/- to Rs. 25 each.
Rechargeable can be connected with
protection/Modification.
Any type but should be matched with the Rs. 7/- to Rs. 10/-
battery.
Optional Quarter wat if not specified.
Rs. 4.5/- to 2.5/- for 1
dozzene,


Part Number UM66
Description Music Calling Bell
Maker ETC
PDF Download

UM66 Datasheet PDF





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