4 Simple Door Buzzer Circuits

These are many simple door buzzer circuits, use low voltage so safely.

I fall bored old buzzer. When using the AC line, the danger of leakage power in the heavy rain.

Three Circuits Below can help you!   What is more?

Have you ever had a problem with the front doorbell or not?

Many ideas of door buzzer sound circuits

When used with directly AC line, the danger of leakage power in the heavy rain.

And the doorbell quality is very expensive.

I think we try to make ourselves better, strange sounds are unique. Cheap pieces of equipment. And high performance. Because we have a Choose circuit.

I collected many of the circuits as follows.

# 1: Door buzzer circuit diagram using 555

This is an easy buzzer circuit. It uses IC 555 timer as key, Speaker 25 -80 Ω.

Door buzzer with IC-555

I demolish a store-room, see old loudspeaker, and other equipment a little again. Then born the though builds Door Buzzer by use, IC 555. Perform sound electric bell origin.

When press S1, as a result, have a voice fair loud. This circuit almost must not do anything.

Because divisible Amen! should use 25-80 Ω size loudspeakers. It will make good sound use force against electricity low work or economize the electricity. You will use 9V batteries all right.

Also: Simple time Delay Circuit using MOSFET

# 2: Door Buzzer circuit using NE555 + LM386

Someday I go to visit a friend. He begs me for helps to seek an electric bell front door circuit. In the model to be simple, use a little equipment.

I then choose the Door Buzzer circuit this give. Because of use, IC NE555 produces electric bell sound and uses IC LM386 to amplify talk at one time. For R1 use fine decorate the sound as you like it. request have fun with this circuit.

Door Buzzer circuit using NE555 + LM386

# 3: Simple Electronic Bell Generator using LM741

This is a basic electronic ell circuit, it is interesting. We use a number of IC-741 Op-amp, it works. When you press S1 will be mimic the bell sound at the output pin 6 of IC1, which we can fine tone sound with three potentiometer are VR1-1M, VR2-1M and VR3-1M to control sound as close as possible. We set form of the audio oscillator generator or sine wave form can be changed with by pressing our S1. But sound is slight required to use power amplifier for boost up its. And this circuit need the dual power supply positive, ground, and negative 9V power supply.

Simple Electronic Bell Generator using LM741

#4: Door buzzer sound circuit using CD4001-CD4060

We like The Door buzzer sound circuit, in two-tone sound. It uses a low voltage, 6V power supply so it is safer than general AC main. We can install the push button outdoor, do not worry about rainy to makes a short circuit. It saves if you use a battery. Because it uses energy only press the push button. See the advantages, do not wait! You can build it.

Door buzzer sound circuit using CD4001-CD4060

How it works

When we press the switch-S1. An electric current flows to the circuit. The IC1 will makes two things.

  • First, generates a oscillator in high frequency. Which the C1 and R1 set a frequency level.
  • Second, it will divide frequency to lower into the tones.

This audio signal from pin 7 and pin 4 into the pin 1 and pin 8 of the IC2a, IC2c respectively.

The IC2b of a frequency converter to control IC2c. When the control signal in during the low state (Low), The 1.25 kHz frequency will come to IC2a.

At the same time, the control signal flows through IC2b to be a high state (High).

The 300 Hz frequency will come to the IC2c. Also, the output at pin 3 of IC2a is low in the same condition.

The output of IC2a and IC2c output is sent to the IC2d. Which it mixes both signal to output to the transistor-Q1.

The Q1 acts as switches and amplifiers. The tones can be heard as two strokes.

The R3 acts as a volume.—You add more value to make the softer sound, but it is lower.

This circuit uses a 6V power supply. You should use a 6V battery or 1.5V x 4 batteries.

2 tone doorbell circuit using transistors

How to build this projects
You can build easily circuit. We use the universal PCB board because has a few parts Cause faster for make than general PCB.

The component List

IC1: CD4060, 14 stage ripple counter and oscillator IC
IC2: CD4001, Quad 2-Input NOR(NAND) Buffered B Series Gate
Q1: BC338, 0.5A 50V NPN transistors.
S1: Switch Nomally open pushbutton.
C1: 0.0047uF 50V, Ceramic capacitors.
R1: 47K Resistor
R2: 4.7K Resistor
R3: 2.2K Resistor

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I always try to make Electronics Learning Easy.


  1. neeraj mathur

    You provide good circuits & some r intresting & easy to assemble.Keep it up./

  2. vinita swami

    i am the student of 3rd year B.tech electronic and communication branch.i am making the project power generation using speed breaker with the help oh piezoelectric buzzer.please provide me the circuit for this…….i will be highly obliged…..

  3. Emman

    Please i have been trying build the salt and alkaline tester as well as the door buzzers there are not working properly. I need them for my project. Thanks

  4. Sivakrishna

    Hai sir,iam the student of 3rd year b.tech student,sir,i want some electronic mini projects,so,could you please send me that mini projects sir

  5. james chemai

    simplified and straightfoward circuits .

  6. Emly

    Hello sir, i thank you for the good work that you have been doing. Do keep it up. I am just a beginner in electronic career from Nigeria and your site have been very helpful. Please help me with what ever informaion you can …thanks a lot.

  7. anas

    sir can u plz tell me what are the applications of buzzer circuit

  8. Dear sir am very grateful for your good works in engineering

  9. Victoria

    Are there any 1 second long buzzers?

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  11. wildhunter

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    You know so much its almost hard to argue with you (not that I really will need to…HaHa).

    You certainly put a new spin on a topic that has been discussed
    for many years. Great stuff, just excellent!

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