Ashutosh Bhatt

In Part I of this series, we demonstrated how to display analog sensor data (value), such as POT or LM35, on a TFT LCD. A TFT is a thin-film transistor display (typically, a television screen or computer monitor) that’s of much higher quality than a regular LCD display. In this article, we’ll explain how to display…

Displaying potentiometer value and temperature using LM35 In my previous tutorial series on displaying sensor data (value) on OLED display, I have explained how to display values of different sensors like a potentiometer, LM35, soil moisture sensor, DHT, HC SR04, etc. on a tiny 1” OLED display. This time, I will demonstrate and explain how…

Contactless temperature-measurement guns became popular during the Covid pandemic. Several places used this device to ensure safety protocols. However, one of the drawbacks of the contactless temperature measurement guns available today is that they measure body temperature — not the distance of the body (object) from the sensor. The body’s distance from the sensor is…

In this article, we will be controlling devices that do not support WhatsApp but support other communication protocols like MQTT, TCP, IMAP, etc. If a house is installed with home automation devices that do not support Whatsapp, we will communicate with these devices (controllers) using protocols supported by these devices. Thus, we will be able…

In this article, we will learn how to control our IoT home appliances using the messaging app WhatsApp to easily and effectively communicatie with those devices. So we will be sending WhatsApp messages to a number of “lights on,” and lights at our house will turn ON. Components required  Tools Required/ libraries required: WhatsApp API…

In this article, we will be detecting a forest fire using an IoT sensor network and making a portable device with battery operation. Getting information about a fire hazard in a forest in time can prevent the forest fire from spreading. The sensor network can give the particular location of the fire as we already…

In Part 1 of this series, we learned how to interface an organic light-emitting diode (OLED) display, using analog voltage (a potentiometer), with Arduino. In Part 2, we covered how to present data from an analog sensor — specifically, a light-dependent resistor (LDR) and soil moisture sensor — on an OLED display. In Part 3,…

In Part I and Part II of this series, we learned how to use an analog sensor — including a potentiometer (POT), a light-dependent resistor (LDR), and a soil-moisture sensor — to present values on an organic light-emitting diode (OLED) display.  In Part III, we’ll also present data on an OLED display, but this time…

In Part I of this tutorial, we learned how to present data (or values) using a potentiometer (POT) and an organic light-emitting diode (OLED) display. For this project, the POT was an analog sensor (potentiometers can also be digital), which acts as a resistor to control the flow of an electric current. The OLED technology…

Sensors are used to convert a physical quantity, such as light intensity or temperature, into an electrical one. There are several types of sensors that can easily be used with an Arduino board, which is an advantage. For example, any analog or digital sensor easily interfaces with Arduino as the board offers both analog and…

The GPS receiver is used to get accurate geographical location by receiving information from satellites. It receives information from satellites and gives location information in terms of latitude and longitude. It gives latitude and longitudes with accuracy of degree-minute-second. Using this latitude and longitude co-ordinates one can easily trace out the location on entire globe. The GPS receivers have enormous applications.The GPS receiver gives output serially in form of strings with NMEA 0183 protocol. These strings are received serially by host computer or host processor/controller for display or to take any decision or action. The following figure shows the output of GPS receiver on hyper terminal of desktop computer.  

RGB bulb means bulb made up of three LEDs – RED, GREEN and BLUE. It generates light of many different colours. As we all know RED, GREEN and BLUE are three primary colours and all other colours can be generated by mixing these 3 colours in different amount. So in RGB bulb the intensity of RED, GREEN and BLUE LEDs are varied – means the amount of RED, GREEN and BLUE colours are varied to generate different colour or shade of different colour.The intensity of LED is varied using PWM generated by NE555 IC. NE555 chip generates PWM when it is connected in astable mode. So three NE555 ICs are used to vary the intensity of three LEDs – RED, GREEN and BLUE.     

Here I am presenting very interesting project that can be use as a nice show piece or display item with live colours. The desire colour can be set manually from 7 different RGB (Red-Green-Blue) colour combinations. FOC light fountain is a made up of hair like small optical fibre cables bunched togather at one side. When light of different colours is given from that side the entire bunch of fibers look like fountain of light. Such show pieces are readily and easily available in gift article shops or show piece item shops.

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In the previous tutorial, we designed a clocked SR latch circuits using VHDL (which is a very high-speed integrated circuit hardware description language). For this project, we will: Write a VHDL program to build a D flip-flop circuit Verify the…

In the previous tutorial VHDL tutorial, we designed an 8-bit parity generator and 8-bit parity checker circuits using VHDL. (If you are not following this VHDL tutorial series one by one, you are requested to go through all previous tutorials of these series before going ahead in this tutorial) In this tutorial, We shall write…

In the previous tutorial VHDL tutorial, we designed 8×3 encoder and 3×8 decoder circuits using VHDL. (If you are not following this VHDL tutorial series one by one, you are requested to go through all previous tutorials of these series before going ahead in this tutorial) In this tutorial, We shall write a VHDL program…

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In the previous tutorial, VHDL tutorial – 14, we designed two circuits using VHDL: a 1×8 de-multiplexer and a 8×1 multiplexer. In this project, we will, Write a VHDL program to build a clocked SR Latch (flip-flop) circuit Verify the…

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In the previous tutorial – VHDL tutorial 16 – we designed a D flip-flop circuit by using VHDL. For this project, we will: Write a VHDL program to build a JK flip-flop circuit Verify the output waveform of the program…

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In previous tutorial, VHDL tutorial – 17, we designed a JK flip-flop circuit by using VHDL. For this project, we will: Write a VHDL program to build the T flip-flop circuit Verify the output waveform of the program (the digital…

The article discusses designing a servo motor angle controller using the IC NE555. The servo motor used here for an experiment is an 11-gram micro servo motor with the following specifications. Rotational range                                    160o Operating voltage     …