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Hospital Room Call Bell Circuit for Alerting Nurse with a Button Press

Last Updated on January 4, 2024 by Swagatam 19 Comments

In this post I have explained a simple hospital room call bell circuit which can be installed in hospital patient rooms for allowing the patients to get a quick access to a medical representative or a nurse whenever in need, by simply pressing a call button at the bedside. The idea was requested by Mr. Willy.

Table of Contents
  • The Design
  • Parts List for the proposed hospital call circuit
  • Hospital Room Call Bell Circuit using SCR

Circuit Objectives and Requirements

  1. Its Willy from Goa,
  2. I want to request to to make a patients room call bell to nurse station circuit diagram for a 10 bedded hospital.
  3. The circuit can be made as simple as possible with no false triggering and solid state with no relays and individual reset switch at the nurse station
  4. Thanking you in advance

The Design

In one of my previous posts I discussed a simple office call bell circuit for facilitating an easy and foolproof communication across the rooms and the headoffice.

In this post I have explained a call bell system for hospital installation in order to facilitate communication between the patients and the nurses who may situated in different rooms or destinations across the hospital premise.

warning message: electricity is dangerous, proceed with caution
Hospital Room Call Bell Circuit

Referring to the above shown hospital room call bell circuit, the idea may be understood as follows:

The transistor T1, T2 basically forms a transistorized latch circuit wherein a trigger at the base of T1 causes the circuit to hold into a latching mode, meaning a single momentary positive pulse at the base of T1 enables T1/T2 to go into a permanent conduction mode until the feed from R3 is grounded by pressing the reset button.

On pressing the button at the patent's end latches the circuit into conduction and causes a DC pulse to be sent through D2 to the connected DC bell.

The bell sounds loudly until the 1000uF capacitor is charged fully, after which the bell ceases to operate.

However the latching action keeps the RED LED switched ON along with the green LED which is supposed to be positioned in the patient's room beside the call button. This LED informs the patient regarding the call been sent and confirms regarding the same. The red LED intimates the nurse regarding the patient's room.

Identical stages as explained above may be repeated and installed for each of the rooms in the hospital for enabling the respective occupants to execute a foolproof interaction with the nurses rooms whenever the patient may be in need for help.

The reset button is provided for enabling the nurse to reset or restore the situation back to the switched OFF condition which also simultaneously tells the patient regarding the response from the nurse's room, so that the patient is able to anticipate the help being on the way.

Parts List for the proposed hospital call circuit

R1 = 100K
R2, R3, R4 = 4K7
C1 = 100uF/25V
D2 = 1N4007
T1 = BC547
T2 = TIP127

Hospital Room Call Bell Circuit using SCR

SCR based Hospital Room Call Bell Circuit

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Filed Under: Health related Projects Tagged With: Alerting, Bell, Call, Hospital, Nurse, Room

About Swagatam

I am an electronics engineer and doing practical hands-on work from more than 15 years now. Building real circuits, testing them and also making PCB layouts by myself. I really love doing all these things like inventing something new, designing electronics and also helping other people like hobby guys who want to make their own cool circuits at home.

And that is the main reason why I started this website homemade-circuits.com, to share different types of circuit ideas..

If you are having any kind of doubt or question related to circuits then just write down your question in the comment box below, I am like always checking, so I guarantee I will reply you for sure!

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