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Content 4/4

For making this project I have used very popular timer IC 555.

When you press the button then the IC generate a tone & after release the button The IC generate a different tone so its sound like ding dong bell.


all components values are printed on PCB.

Supply voltage of this circuit is 3 volt to 6 volt. don't use more than 6 volt DC.




More details - https://technoreview85.com/electronic-dingdong-doorbell/


Bill of materials used in this project

Capacitor 10mfd /25v
1
100mfd/25v
1
47K resistor
4
Diode IN 4148
2
Ceramic capacitor 0.01uf
2
Ceramic capacitor 0.001uf
1
Micro switch
1
Terminal block
2
IC 555
1
8 pin Ic base
1
4 X AA batteries & battery holder
1
Apr 14,2020
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