Articles by Dr. Abhishek Ghosh

In our previous guide to Create an Arduino LDR Module With Transistor, at the end of the guide we discussed about lighting up LED without microcontroller with minimum modification of that circuit. Not all the readers are enough advanced to modify circuit own self to make the current thing. We Can Use NPN Transistor, Resistors to Turn On LED On Dark Without Need of Arduino Program. That is Great … [Read more...]

In our previously published guides, we listed commonly used transistors with Arduino and How to Turn on LED with LDR. In that turning LED on, we needed no transistor. We Can Create an Arduino LDR Module With Transistor in Easy Way to Print Response as Either Zero or One. We will use a BC 547 as transistor, which is an NPN transistor. After testing this diagram on breadboard, you can make it … [Read more...]

Stepper Motor is Much More Complicated From Buying Point of View Than Servo Motor. If you are new with electronics, we will suggest you to first work with 3V DC Motor, then try Servo Motor and after mastering basic sensors, ICs which are commonly used with Arduino; think for stepper motor. In Other Words, In This Arduino Stepper Motor Buying Guide, We Are Taking it Granted That You Know Needed … [Read more...]

Normally we need to add a 220 Ohm resistor with LED for Arduino dev boards and similar works. Not only making that on breadboard wastes time, but also it takes time to either check the value of resistor manually or using a multimeter. The thing we made looks great and quite useful for day to day electronics development works for simple "plug and plan". We saw the idea somewhere and recreated it to … [Read more...]

This idea is good for automatic turning on and off multiple lights one by one while a person is walking staircase or walking through a passage or hallway. As IR Obstacle Sensors has physical limits, we can not use if the passage is wide like a road - it will fail for physical reasons. Human is not much thick too! In our previous guides - Arduino IR Obstacle Detection Sensor For Dimming LED and … [Read more...]

Why They RX/TX LEDs Blinks Upon Code Uploading? How History of Terminal Relates to it? What Are RX/TX LEDs and Pins on Arduino Boards? History of old Terminal, Telegram and Broadcast engineering. Around 150 years back, we had only way to communicate is sending pulses of current. That was the starting of analog means of connection. Slowly, when telegram improved, terminal devices became faster … [Read more...]