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Make this Simple 2 Tone Door Bell Circuit using IC 555

Last Updated on April 20, 2025 by Admin Leave a Comment

two tone door bell circuit compressed

Here we are making an electronic doorbell circuit that makes a dual-tone sound. So this thing is designed using the well-known IC 555. That IC 555 is something we see […]

Filed Under: Audio and Amplifier, Household Circuits Tagged With: 555, Bell, Door, Simple, Tone

Automatic Kennel Door Circuit with Day Night Lock

Last Updated on December 26, 2024 by Admin Leave a Comment

darkness activated door lock circuit

This article explains a simple automatic door locking system that works when day turns into night. This clever setup is made to automatically unlock a kennel door in the morning […]

Filed Under: Automation, Pets and Pests Tagged With: Automatic, Day, Door, Kennel, Lock, Night

Door Buzzer Circuit

Last Updated on June 26, 2020 by Admin Leave a Comment

fig1 28

This unit is actually a two tone door buzzer of the form that generates a basic tone for around one second, accompanied by a tone of lower pitch. The result […]

Filed Under: Audio and Amplifier Tagged With: Buzzer, Door

Automatic Sliding Door Circuit

Last Updated on April 11, 2020 by Admin 2 Comments

sliding door

Automatic opening and closing doors normally don’t get much attention since they involves complex mechanisms. But still a few innovative people have attempted to set an automatic sliding door in […]

Filed Under: Motor Driver Tagged With: Automatic, Door, Sliding

Programmable electronic Door Bell Circuit

Last Updated on January 10, 2018 by Admin 1 Comment

chime el

This programmable electronic musical door bell circuit is really simple since the integrated circuit really does all the things! It should be stated that we now have created some substantial […]

Filed Under: Audio and Amplifier Tagged With: Bell, Door, Electronic, Programmable

Door Lock Circuit using Digital Code

Last Updated on January 10, 2018 by Admin Leave a Comment

IMG 0005

In this post we try to analyze a simple door lock circuit using digital code that needs to pressed with a unique sequence in order to activate the door lock […]

Filed Under: Security and Alarm Circuit Tagged With: Code, Digital, Door, Lock

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