RF TX RX – HVS Technologies

HVS-3388. Sleep sensing and Alerting system for drivers

hvsadmin — Sat, 24 Jan 2026 12:05:00 +0000

In modern-times, owing to hectic schedules it becomes very difficult to remain active all the time. Imagine a situation where a person is driving home from work, dead tired after facing all the challenges of the day. His hands are on the wheel and foot on the pedal but suddenly he starts feeling drowsy, his eyes start shutting and his vision blurs and before he knows it, he’s asleep. Falling asleep on the wheel can lead to serious consequences, there may be accidents and people may even lose their lives. This situation is much more common than we notice and hence, it is very important to counter this problem. So, to address this issue, we have come up with a Driver Anti-sleep Device. This system alerts the user through buzzer if he/she falls asleep to avoiding accidents and saving lives. This system is useful especially for people who travel long distances and people who are driving late at night.

The main controlling device of the whole system is an arduino nano Microcontroller. Eye blink sensor and Buzzer and RF transmitter are connected to Microcontroller. This sensor data continuously monitors by the Arduino nano microcontroller. If the sensor detects drowsiness it will process to the microcontroller, then microcontroller active the Buzzer and transmits this to the vehicle section through RF transmitter. This data received by RF receiver and stop the vehicle ignition automatically. To perform the task, Microcontroller is loaded with an intelligent program written in embedded ‘C’ language.

The main objectives of the project are:

Automatic drowsiness detection using eye blink sensor.
Automatic vehicle ignition control system.
Using wireless RF technology.
Audible alerts using buzzer.
To achieve this task using Arduino nano microcontroller.

The main blocks of this project are:

9v Battery power.
Arduino nano microcontroller.
Eye Blink sensor.
RF transmitter and RF receiver modules.
Encoder and Decoder.
DC Motor

Software’s used:

Embedded C programming.
Arduino IDE Studio for dumping code into Micro controller.
Express SCH for Circuit design.

Block diagram:

video:

HVS-1080. Smart zone based Vehicle speed control

hvsadmin — Sat, 27 Dec 2025 12:49:39 +0000

The project aims in designing an efficient automatic speed control of cars using RF wireless communication at the specified zones like hospitals, schools, accidental places etc.

Now a day’s every system is automated in order to face new challenges. In the present days Automated systems have fewer manual operations, flexibility, reliability and accurate. Due to this demand every field prefers automated control systems. Especially in the field of electronics automated systems are giving good performance.

The modules in the project are: RF transmitter and receiver modules for establishing wireless communication, DC motors for the robot movement.

Zone section consists of RF transmitter with battery power. Another section is with the vehicle (robot) which consists of microcontroller interfaced with DC motors and RF receiver module. The RF receiver gets the data relating to entry into slow speed zone and feds this to microcontroller. Microcontroller acts on the vehicle motors to reduce the speed of the vehicle.

The Microcontrollers used in both sections are loaded with an intelligent program written using embedded ‘C’ language.

The objectives of the project include:

Automatic speed control of vehicles when they enter in Speed control Zones like schools, hospitals etc..,

The major building blocks of this project are:

Regulated Power Supply.
RF Transmitter.
RF Receiver.
PIC Micro Controller.
Crystal
Reset.
LED indicators.
DC motors with driver.

Software’s used:

PIC-C compiler for Embedded C programming.
PIC kit 2 programmer for dumping code into Micro controller.
Express SCH for Circuit design.

Block diagram:

video:

HVS-1079. RF based Child missing alert system.

hvsadmin — Sat, 29 Nov 2025 12:19:52 +0000

The project aim is to construct an intelligent system for continuous monitoring of a child. Children missing and kidnapping has become common these days. This system automatically horns a buzzer alarm, if child tries to move out of the house.

RF Communication ranges in between 30 KHz to 300 GHz. RF communication works by creating electromagnetic waves at a source and being able to pick up those electromagnetic waves at a particular destination. These electromagnetic waves travel through the air at near the speed of light. The wavelength of an electromagnetic signal is inversely proportional to the frequency; the higher the frequency, the shorter the wavelength.

The main controlling device of the whole system is a Microcontroller. RF receiver, buzzer and LCD are interfaced to Microcontroller. RF transmitter is connected in such a way that it always transmits the data. The RF receiver gets the data and feeds it to the Microcontroller. The microcontroller processes the data and analyzes whether the chills is within the range or not. A buzzer alarm is horned, if child is not in the range allotted. Also, LCD is used to show visual alerts. The Microcontroller is loaded with an intelligent program written using embedded ‘C’ language.

The objectives of the project include:

Alerts child missing.
Monitors child or a blind person.
Wireless transmission using RF.
A buzzer to give alerts.
Visual alerts using LCD.

The major building blocks of this project are:

Regulated Power Supply
RF Transmitter
RF Receiver
Microcontroller
LED indicators
Buzzer with driver
LCD with driver
Crystal oscillator
Reset

Software’s used:

PIC-C compiler for Embedded C programming.
PIC kit 2 programmer for dumping code into Microcontroller.
Express SCH for circuit designing.

Block diagram:

video: