• Skip to main content
  • Skip to primary sidebar

Making Easy Circuits

Learn and build electronic circuits

You are here: Home / New Circuits / How to Make a Office Call Bell Network Circuit with LED Monitor

How to Make a Office Call Bell Network Circuit with LED Monitor

Last Updated on February 17, 2018 by Admin Leave a Comment

The submit describes a call bell network system for office complexes which might be employed for contacting and tracking office member's attendance and reply from the specific meant office chamber.
The suggested office call bell network as required above might be summarized provided below:
The central head office ought to be attached to each of the office departments such that pressing the specific push buttons rings the related bell in the preferred office chamber.
In an event the concerned office member is not in the "called" office, but in other sorts of close by department and hears the ringing, has the capacity to react by showing up at the "answer button" from the other office the member could be located throughout that immediate.
The above reply gets kept in the form a glowing LED in the head office enabling the attendant there to check the concerned members exact position.
The circuit achievement of the offered office call bell monitor network can be achieved by utilizing several set/reset flipflops as might be observed below diagram:

 

office2Broom2Bbell2Bnetwork
The circuit above demonstrates an illustration wiring for three office rooms which can be lengthy to any most wanted numbers basically replicating the stages.
As may be seen the upper section comprises three identical stages of transistor set/reset modules, each module being made up of two NPN transistors, one PNP, a couple push buttons and a few resistors.
The push button labeled as "ON" is utilized for signaling or provoking the latch circuit comprised of T1 and T2. The OFF button does the reverse that is deactivates the certain module activation.
When started a positive voltage turns into offered at the collector the corresponding PNP transistor which can be shut down for activating the office bell located at the specific office, in the diagram these are labelled as "Trigger to room#1, room#2, room#3...."
When one of these triggers is started it's presented to a relay driver circuit system set up in the intended office chamber where the trigger is provided to the base of the relay driver transistor as demonstrated in the diagram below (labelled as "trigger from head office").
This encourages the relay to get initialized as well as the linked bell across the relay contacts.
The member now presses the green switch in result which happens to be moved back to the head office and gathered across one of the inputs marked "trigger from room#1, room#2 room#3..." relying upon from where the member might have attended the green button. This activity allows an immediate switching off of the bell.
If it was from the concerned room, say as an example room#1 then the corresponding red LED placed in "room#1"module gets lighted and latched, if it was from any other room the corresponding red LED is activated offering the right immediate location of the member in the course of his/her reaction to the call made from the head office.
The red LED illumination could be reset and restored to its turned OFF position by pressing the reset button at the extreme right corner of the above head office call bell monitor circuit above.

 

office2Bcall2Bbell2Bnetwork
Parts list
All R1 = 100 k
All R2, R3, R4 = 10 K
All diodes = 1N4148
All C1 = 100uF/25V
All NPN = BC547
All PNP = BC557

You'll also like:

  • 1.  Simplest Transistor Running Light Circuit for Christmas Lighting Decoration
  • 2.  Simple Electronic Pinball Game Circuit
  • 3.  Sound Operated Music Bell
  • 4.  How to Build a Thunder Lightning Detector Circuit
  • 5.  How to Build a LM317 as a Variable Voltage Regulator and Variable Current Regulator
  • 6.  Simple 220V Ding Dong Bell Circuit

About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Categories

  • 3 Phase (4)
  • 8051 Microcontroller (1)
  • Arduino (11)
  • Audio and Amplifier (102)
  • Automation (8)
  • Battery Chargers (64)
  • Bicycle Projects (4)
  • Car and Motorcycle Projects (39)
  • Datasheets (10)
  • DIY Projects (5)
  • Electrical (15)
  • Free Energy (6)
  • Games Projects (2)
  • High Voltage (14)
  • Hobby Projects (30)
  • Household Circuits (2)
  • IC 555 Circuits (5)
  • Ignition Circuits (2)
  • Indicators (50)
  • Infrared (6)
  • Inverter Circuits (29)
  • Lights and Lamps (97)
  • Medical (8)
  • Meter and Tester Circuits (38)
  • Motor Driver (17)
  • New Circuits (56)
  • Oscillators (30)
  • Pets and Pests (5)
  • Power supply (80)
  • Protection Circuits (25)
  • PWM (9)
  • Remote Control (20)
  • Security and Alarm Circuit (48)
  • Sensors and Detectors (66)
  • Signal Processor (23)
  • Solar Controller Circuits (62)
  • SSR (3)
  • Temperature Controller (20)
  • Timer (25)
  • Transformerless (7)
  • Transmitters (12)
  • Tutorials (45)
  • UPS (2)
  • Voltage Regulators (57)
  • Water Sensor and Controller (29)
  • Home
  • Privacy Policy
  • Contact
  • Disclaimer
  • Copyright

© 2025 · Making Easy Circuits