Introduction: Two Tone Doorbell Using IC 555
Saw someone selling a two tone buzzer on Aliexpress for $10. Immediately my brain said, are you serious?
Just by investing a little bit of your time and enthusiasm you can make this circuit for under 3 dollars.
Step 1: Components Used
For this project we need:
- 1 x 555 Timer IC
- 1 x Pushbutton Switch
- 2 x 1N4148 Diodes
- 1 x 10μF Capacitor
- 2 x Ceramic Capacitors (103)
- 4 x 47K Resistors
- 1 x 8Ω Speaker
Step 2: Schema
So, this is the simple schematic of the two tone buzzer circuit using the 555 timer IC.
Step 3: The Board
And, this is how my board looks like.
The link to the gerber file is here: http://scorphq.com/GrpHDD/GerberFiles/Gerber_Door_...
You can also download it from my website or my blog: http://diy-projects4u.blogspot.com/
Step 4: Assembly
Lets start the project by soldering the 4, 47K resistors to the board. Then, lets solder the 2, 1N4148 Diodes to the board. After that I am soldering the 2 ceramic capacitors to the board. Next, I am soldering the 10μF Capacitor followed by the base of the 555 timer IC. Finally, I am soldering the male female pin-headers to the board. It really doesn't matter what order you solder the components to the board; however, putting the small components first makes the process a bit easy.
Once all the components are in place its time to install the IC to the base, that's it all done.
Step 5: Demo
By pressing the push button switch you can now produce the two tones from the 8Ω Speaker attached to the pin headers.
Step 6: Thanks
Thanks again for checking my post. I hope it helps you.
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Full Blog Post: https://diy-projects4u.blogspot.com/2020/09/two-t...
Gerber File: https://diy-projects4u.blogspot.com/2020/09/two-t...