A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
What is a relay? A relay in an electromagnetic device that is activated by a low voltage ranging from 3-12 v. When the electromagnet is activated it pulls a contact to make or break high voltage circuit. A simple relay…
Introduction In the previous part we have seen how to configure Azure for IOTHub. In this post we will cover setting up the Raspberry Pi and connecting it to the sensor and sending the data to Azure IOTHub. For more…
In this project we will learn to measure Humidity and temperature using DHT22 and Arduino. There are 2 version of the sensor DHT11 and DHT22. DHT22 sensor is more expensive and obviously has better performance and accuracy. Its temperature measure…
Below is the circuit idea for pocket size FM receiver using RF transistors. The circuit works off a small 4.5 volt battery or 5v USB. The heart of the circuit is the two RF transistors T1 and T2 to detect…
To make a digital clock using Arduino and DS1302 we need following materials. Arduino UNO ( you can use any arduino) 16*2 LCD display DS1302 module/chip 1.2 k resistance Variable resistance 10k Pot Make the connections as mentioned below: Connecting…
To make a tachometer for bicycle tachometer we will be using Arduino and reed switch as the main component. We will design the tachometer to Display Speed and also temperature. Following are the list of components required. Parts list: Arduino…
In this post we will be designing home automation using Arduino UNO and IR remote control device. Components Required Arduino UNO board TSOP 1738 IR Remote Control Receiver 1 KΩ Resistor X 4 2N2222 NPN Transistor X 4 1N4007 Diode…
What is a time delay relay circuit? In a time delay relay circuit, relay contacts are closed or open after the preset time interval. Whereas in a normal relay contacts are open/closed immediately when coil is energized. It prevents the…
About LM4890 1 Watt audio amplifier for mobile device has been designed using LM4890 power amplifier. LM4890 is primarily designed for mobile phones and other portable devices. It is capable of delivering 1 watt of continuous average power to an…
Real time clock with DS1302 is designed using Arduino Uno. About DS1302 The DS1302 is a trickle-charge timekeeping chip containing a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The…