Long Range Powerful FM Transmitter Circuit with PCB Layout – Tested

Written by Prithwiraj Bose on . Posted in Hobby Centre

FM Transmitters are always one of most popular circuits for hobbyists. Transmitting audio without wire is really exciting to make and use. I particularly know this because I am hobbyist. I am not an Electronics Professional. My major was not Electronics. I started my journey with Electronics as a hobbyist who loves to make every hobby circuit available on the web. After gaining much experience on which circuits to make and which projects are fake, I started writing this blog. I personally test each of the circuits, which are posted in my electronics hobby section. I’ve been playing around with this long range high power FM Transmitter circuit for quite a while and finally got a chance to make and test it personally last week.

NE555 based PWM DC Motor Speed Controller Circuit with PCB Layout

Written by Prithwiraj Bose on . Posted in Hobby Centre

In this article I will show you how to create a NE555 Timer IC based PWM DC Motor Speed Controller. I will share the circuit diagram, component list, tips for making the circuit yourself and a fully working Printable PCB Layout. You can fabricate your PCB with this layout and make the circuit easily. This is one of the most common circuits of my Electronics Hobby series.

LM317 High Current DC Regulated Power Supply Circuit

High Current DC Regulated Power Supply Circuit With LM317 – 5 Amp Current with Voltage Control

Written by Prithwiraj Bose on . Posted in Hobby Centre

Lets make a High Current power supply with LM317 Voltage Regulator which can supply upto 5 Amp. LM317 is one of the oldest, most used and wonderful linear voltage regulators. I personally love this IC (yes, it’s not a transistor) a lot, not because it server it purpose well, but because it’s cheap, easy and never disappoints you while making a regulated DC power supply. In this blog we will make a High Current power supply with LM317 Voltage Regulator and a couple of Power Transistors

Create an Obstacle Avoiding Arduino Robot

Creating an Obstacle avoiding Robot with Arduino, Adafruit Motor Shield v1 and Ultra-sonic Sensor

Written by Prithwiraj Bose on . Posted in Hobby Centre, Programming Tips Tricks Tutorials

Let’s make an Obstacle avoiding Robot. In this brief tutorial I will show how to build a perfect obstacle avoiding (run-away) robot using Arduino. I have used an Ultrasonic sensor mounted on a Servo Motor and a motor Shield for this project. The motor driver is Adafruit Motor Shield. This single shield is capable of controlling upto 4 DC motos and 1 servo motor simultaneously. Download link for the Arduino Robot Project Code (Arduino Sketch along with the required libraries) is available below. In this tutorial, I have not highlighted the instructions to setup the Robotic chassis along with BO Motors, Caster Wheel, Arduino Board etc. Rather I have concentrated on the how to extend the circuits to make it usable, connect the circuits and write the Arduino Sketch to make the Motors rotate by sensing the distance from Obstacles. When I created my first Arduino based Obstacle avoiding Robot, I was pretty much done with the mechanical connection, before getting stuck into the circuitry and programming. These were the 2 areas, where I struggled a lot and had to refer multiple tutorials to get a complete road-map. Here I will try to address those problems, which are often encountered by Newbies.