Ashutosh Bhatt

In previous tutorials of this series, we saw how to vary the intensity (brightness) of LEDs using the PWM output of ATtiny85. This tutorial shall take it to the next step by varying LED brightness using a potentiometer (pot). The pot will give an analog output of 0 to 5V. ATtiny85 has an inbuilt ADC…

In the previous two tutorials of this series, we have seen how to vary the intensity (brightness) of LEDs using the PWM output of ATtiny85. In this tutorial, we shall use a PWM output to vary the speed of a DC motor. DC Motor speed varies as the potentiometer is varied. As we have learned…

In the previous three tutorials of this series, we saw how to vary the intensity (brightness) of LED and DC motor speed using the PWM output of ATtiny85. In all those previous tutorials, we used only one PWM output, but now we shall simultaneously use three PWM outputs of ATtiny85. ATtiny85 has three PWM outputs…

In this tutorial series, we have learned about interfacing potentiometer to get analog input, interfacing of RGB LED by generating PWM output, DC Motor speed control using PWM output, and some other things. This tutorial explains the serial communication of ATtiny85 with Bluetooth module HC05. ATtiny85 does not have built-in UART or USART with Rx…

In the previous tutorial, we have learned how ATtiny85 serially communicates with Bluetooth module HC05 and send/receive commands from smartphone Bluetooth This tutorial also involves the role Bluetooth module HC05. But instead of receiving commands from a smartphone, it sends sensor data values to the smartphone. The sensor is connected to an analog input pin…

In the previous tutorial, we learned we need the following hardware and software tools to build any application using ATtiny85. Arduino IDE software USB SPI AVR programmer PROGISP software So let us build the first LED blinking, “hello world” application for the ATtiny85 microcontroller. Open Arduino IDE. Open LED blinking example from file->example->basic->blink Modify the…

Complete robot is combination of three subsections: Robotic mechanism, Hardware driver circuit, controlling software in VC++.Obviously, the main part will be the mechanism that actually forms the body of robot means moving hand that picks or places any object. Function of hardware driver circuit is to drive all three motors and actuates all the motions of robot. Controlling software is also an important part of this robot because it will take care of all controlling actions. The main functions of this section are: Rotate the hand to one specific angle from where the object should be picked or to be placed, Move the hand up or down to pick or place the object, and Open or close the grip of hand depending upon size of object. 

UMPS is perhaps most efficient virtual simulator for simulating the programs of 8051/52/2051/4051, PIC micro controllers, HC micro controllers, AVR microcontrollers etc. It provides perfect platform for simulating real time applications. It has wide varieties of peripherals to connect with micro-controllers like in display there are LED, matrix LED, alpha numeric display, all type of LCD etc. Other peripherals like ADC, DAC, serial transmitter-receiver, function generator, I2C memory, I2C display, PWM converter, digital recorder and player, shift register etc. are given to design any embedded system. With the help of umps, one can create virtual 8051 training board on his computer’s desktop. He can simulate all kind of programs by connecting required resources like 7 segment display, Matrix LED, LCD, Matrix keyboard and all he wants. 

This is programmable FM remote control can be used for some specific applications. Phase Lock Loop (PLL) IC-567 is used in transmitter and receiver part as oscillator and filter respectively. It can operate/control any device / application from the distance of around 50 meter (this range can be increased up to 1-2 Km if good…

How to deal with any unknown stepper motor? This section deals with a special procedure that can be useful to find out the type of stepper motor, its terminals, its coil sequence, its step resolution and everything about stepper motor. if anyone have a steppe motor that doesn’t have any specifications then after going through this section…

In the previous tutorial of this series, we have seen how to work with ATtiny85, how to program it, and also we have built our first – hello world application – that is LED blinking application using ATtiny85. So let us extend it to the next step – means one step advance. We shall connect…

This article explains how one can change the direction and speed of mini DC motor using very simple circuit built using readily and easily available handy components. First we will see how we can change the direction of motor and then we will see how we can vary the speed of DC motor. Then I will explain very simple DC motor controller circuit that changes direction as well as varies the speed of DC motor. So let us start 

All you might have seen controlling a DC motor using joystick.Most of RC toys are DC motor operated and they are controlled using remote controlled joystick. There is a RF transmitter in the remote controlled joystick and in a toy, there is RF receiver that rotates DC motor forward (clockwise) and reverse (anticlockwise)The remote controlled robotic vehicles used in military applications also controlled using such joystick connected with laptop or computerUnmanned air vehicles like drone, quad copter etc used for air surveillance or aerial photography/videography are the best examples of joystick control 

This article explains how to build a voice-based Home Automation to control Home Appliances. Google Assistant is used to input voice commands or text commands. The main intention of this project is to introduce various IoT tools and integrate them to build a real-time project. As home automation is a friendly project, it is chosen…

ATtiny85 microcontroller is a very popular 8-bit RISC microcontroller. It has become the first choice for professionals and developers because of its incredible features in such a small size. As its name suggests, it’s a tiny 8-pin (PDIP) microcontroller with almost all required features that any microcontroller should have such as built-in FLASH, EEPROM, SRAM,…

Working with ATtiny85 requires you to learn how to write a program for ATtiny85 and how to download it into its internal Flash memory. Would it surprise you to know that we can write programs for ATtiney85 in Arduino IDE? Yes, it is true. We can write, compile, create HEX files and even download the…

IC 555 timer is a well-known component in the electronic circles but what is not known to most of the people is the internal circuitry of the IC and the function of various pins present there in the IC. Let me tell you a fact about why 555 timer is called so, the timer got its name from the three 5 kilo-ohm resistor in series employed in the internal circuit of the IC. IC 555 timer is a one of the most widely used IC in electronics and is used in various electronic circuits for its robust and stable properties. It works as square-wave form generator with duty cycle varying from 50% to 100%, Oscillator and can also provide time delay in circuits. The 555 timer got its name from the three 5k ohm resistor connected in a voltage-divider pattern. 

Previously, I have given arduino library for unipolar type stepper motors. It perfectly controls speed, direction, the number of revolutions, motor angle etc all the parameters of unipolar type stepper motors. But it was for only unipolar type stepper motors. As we know the stepper motor may be bipolar type also. But this library cannot control bipolar type stepper motor. So, I have decided to develop another arduino library to control bipolar type stepper motor. Here, I present Bipolar Stepper motor library in Arduino for all bipolar type stepper motors. The library has 9 different functions that can be used to rotate and control motor as per the requirements. The library is designed as per the industrial motion control requirements.

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In the previous tutorial, VHDL – 18, we designed a T-flip flop using VHDL. For this project, we will: Write a VHDL program a VHDL program to build a 4-bit binary counter Verify the output waveform of the program (the…

Note: it’s recommended to follow this VHDL tutorial series in order, starting with the first tutorial. In the previous tutorial, VHDL Tutorial – 19, we designed a 4-bit binary counter using VHDL. In this tutorial, we will: Write a VHDL program to build a 4-bit binary to gray, and gray to the binary code converter Verify…