Analog
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DIY ESP32 Based Audio Player DIY Music players are fun to build, and we previously built a few music players using Arduino and a dedicated MP3 module. Now we are using the ESP32 speaker output to build an interesting audio player, in which you can add sound effects by just connecting an extra speaker to the ESP32. Here we will use LM386 and a speaker with ESP32 to play music files. The audio… |
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How Does Successive Approximation (SAR) ADC Work and Where is It Best Used? An Analog to Digital Converter (ADC) is a type of device that helps process real-world analog signals for digital systems. To understand real-world data like temperature, humidity, pressure, and position, we need transducers that convert these measurements into electrical signals. Since the majority of devices we use at the moment are digital, this conversion becomes… |
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Maxim Integrated’s Essential Analog Transceivers Deliver Reliable Connectivity and Industry’s Highest Uptime for Industrial Networks Via Enhanced Fault Detection and Operation Range Designers requiring longer uptime for industrial automation applications can accelerate troubleshooting and communicate across larger networks with the MAX33012E controller area network (CAN) bus transceiver and the MAX33072E RS-485 half-duplex transceiver from Maxim Integrated Products. These devices are designed to increase industrial system uptime for factory-floor… |
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Digital Audio Volume Control Circuit using PT2258 IC and Arduino A potentiometer is a mechanical device using which one can set the resistance according to the desired value, thus changing the current passing through it. There exist many applications for a potentiometer, but mostly, a potentiometer is used as a volume controller for audio amplifiers. The digital volume control circuit is an electronic circuit that accurately adjusts… |
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pH Meter using Arduino Uno and LCD Display The pH scale is used to measure the acidity and basicity of a liquid. It can have readings ranging from 0-14, where 0 shows the most acidic liquid and 14 shows the most basic liquid. 7 pH is for neutral substances that are neither acidic nor basic. Now, pH plays a very important role in our lives, and it is used in various applications. For example, it can be used in a… |
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How to Properly Terminate an unused OP-Amp to Avoid Noise and Power Related Issues An op-amp plays a very crucial role when it comes to designing circuits with analogue components. But while implementing such op-amp based circuits, there are situations where one or more op-amps are left unused, this causes undesirable behaviour in one or all of those unused op-amps thus impacting total system performance. To avoid this type of… |
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Superheterodyne AM Receiver - Working with Block Diagram and Schematics A superheterodyne receiver uses signal mixing to convert the input radio signal into a steady intermediate frequency (IF) that can be worked with more easily than the original radio signal, which has a different frequency, depending on the broadcasting station. The IF signal is then amplified by a strip of IF amplifiers and then fed into a detector that outputs the audio… |
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Relaxation Oscillator using Op-amp An operational amplifier is an integral part of Electronics, and we previously learned about Op-amps in various op-amp-based circuits and also built many oscillator circuits using op-amps and other electronics components. An oscillator generally refers to the circuit which produces periodic and repetitive output, like a sine wave or square wave… |
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Arduino Based FM Radio using RDA5807 Today almost everyone uses their mobile phones to listen to music, news, podcasts, etc. But not long ago we were all depending on local FM Radios to get the latest news and songs, slowly these Radios are losing popularity but in emergencies when the internet is down, radios place an important role to transmit information to the users. Radio signals are always present in the… |
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Butterworth Filter: First Order and Second Order Low Pass Butterworth Filter Electric filters have many applications and are extensively used in many signal processing circuits. It is used for choosing or eliminating signals of selected frequency in a complete spectrum of a given input. So the filter is used for allowing signals of chosen frequency pass through it or eliminate signals of chosen frequency passing through it. … |
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Biasing Methods of Class A BJT Amplifiers When you want to design bipolar transistor circuits you need to know how to bias them. Biasing is applying electricity to a transistor in a specific way to make the transistor perform the way you want it to. There are mainly five classes of Amplifier - Class A, Class B, Class AB, Class C and Class D. In this article we will focus on biasing the transistor in a common emitter… |
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TLV320ADC5140 - New audio ADC for far-field Voice capturing in Smart Speakers Texas Instruments has introduced the TLV320ADC5140, a new audio analog-to-digital converter that can capture clear audio up to four times farther away than the other competent devices. It is the industry’s smallest quad-channel audio ADC with this level of performance and is part of a new family of three TI Burr-Brown audio ADC that enable low distortion audio recording in… |
