HC-SR04 ultrasonic sensor with arduino tutorial

how HC-SR04 ultrasonic works

Distance obtained by calculating how much time required for ultrasonic to travel from transmitter to receiver.

L293D motor driver with arduino

DC motor

If you want to control an DC motor that can run forward or reverse you can do that in many ways. But I want to tell you the simplest way.

How to convert resistance to voltage

convert resistance to voltage

Converting resistance to voltage in electronics sometimes are so important because many electronics device such as microcontroller only can read voltage.

How to make Variable Voltage Regulator using LM317

The LM317 device is an adjustable voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V.

Understanding Voltage Divider

voltage divider

Unfortunately, your arduino can sense voltage only from 0V-5V. That’s why voltage divider come in handy.

How To Make Relay Driver

relay driver schematic

We can’t use relay directly to microcontroller such as arduino or microprocessor like raspberry pi.

Understanding driver circuit / electronics driver

motor DC with driver to arduino

Driver is something that can control other electronic component