Spy gadgets, once exclusive to professional espionage, are now widely accessible and affordable for everyday users. Today, such devices are commonly employed in personal security, surveillance, private investigations, and sting operations. They also serve practical personal needs, such as monitoring pets, children, or elderly family members, recording lectures and meetings, and documenting events. Various spy…
How to play MP3 files on Arduino using the DFPlayer Mini or the MP3-TF-16P
Including an audio option with an electronic or Internet-of-Things (IoT) project is often an ideal addition. However, microcontrollers cannot process MP3 files, which is the most common audio file format. Fortunately, there is a solution. It is possible to play MP3 audio files on Arduino using dedicated MP3 decoders like the DFPlayer Mini or MP3-TF-16P.…
How to design an audio player for toys
Toys have come a long way from basic dolls and wooden blocks. In today’s tech-savvy world, electronic toys have become integral to childhood play. This includes interactive tablets, electronic games, and robotic devices. Several toys incorporate sophisticated technologies to engage, educate, and entertain kids. One of the features of many modern toys is audio. From…
STMicroelectronics introduces new automotive-qualified operational amplifiers
STMicroelectronics’ TSZ181H1 and dual TSZ182H1 automotive-qualified operational amplifiers (op amps) deliver high accuracy and stability over a wide (-40° to 175° C) temperature range. The high maximum operating temperature encourages use in harsh environments and in applications with long mission profiles. The op amps have very low input offset voltage, typically 3.5µV at 25° Cm, and input bias…
Infineon expanding its automotive microphone portfolio
Active Noise Cancellation (ANC) ensures a quiet vehicle interior and provides passengers with a more relaxed driving experience. Furthermore, using advanced ANC solutions instead of passive damping methods significantly reduces vehicle weight, which benefits vehicle efficiency. For ANC systems with an analog interface, Infineon Technologies is now expanding its automotive microphone portfolio with the XENSIV…
Infineon launches new PDM microphone with low power consumption
For the third consecutive year, Infineon Technologies has successfully defended its position as a MEMS microphone supplier. Moreover, Infineon’s market share rose to a staggering 45% as bare die microphone manufacturer in 2021 — according to recent research published by technology expert Omdia. This positive development is due to Infineon’s long-term experience in MEMS microphone…
Infineon releases MERUS multilevel Class D audio amplifiers
Long-lasting music playback performance that comes in compact, cost-effective, and power-efficient designs, is indispensable for battery-powered applications. Infineon Technologies recently introduced its latest generation of MERUS multilevel Class D audio amplifiers. Several ecosystem partners of Infineon are now ready to support interested customers with their design-in efforts. Partnering with the experts, the company aims to…
STMicroelectronics boosts op-amp performance for automotive sector
STMicroelectronics is simplifying designers’ search for high-performing operational amplifiers (op amps) by introducing three new 6MHz rail-to-rail devices with strong all-around parameters including a wide operating voltage range and low noise. The TSB511, TSB512, and TSB514 are single, dual, and quad op amps, respectively. They can operate from a single supply in the range from 2.7V to 36V, and…
Infineon’s new audio amplifiers feature MERUS multilevel switching amplifier
When designing portable and battery-powered audio devices for consumer speaker applications, maximizing battery playback time and maintaining excellent audio performance in a compact form and at a low-system cost is essential. MERUS multilevel switching technology from Infineon Technologies is designed to achieve low switching losses and highly efficient amplification at both low and high output…
Infineon introduces high-performance XENSIV MEMS microphones
Infineon Technologies is launching its next-generation XENSIV MEMS microphones that define a new industry standard. The microphones IM69D127, IM73A135, and IM72D128 are the latest additions to Infineon’s growing microphone portfolio. Combined with selectable power modes the MEMS microphones are a perfect match for consumer electronics such as headphones with active noise cancellation, TWS earbuds, conference devices with…
STMicroelectronics’ new automotive amplifier supports high-definition audio
STMicroelectronics’ TDA7901 automotive amplifier integrates a buck controller for class-G power switching and supports high-definition audio — a market-unique combination for ideal listening and high efficiency. In class-G operation, the TDA7901 buck controller automatically optimizes the voltage supplied to the bridge-tied load (BTL) power-stage, depending on the audio-signal level. The resulting smooth, analog sound comes with…
Infineon introduces MERUS Class D, an audio amplifier multichip module
Unlocking the potential of its best-in-class power MOSFET technology, Infineon Technologies is introducing the MERUS 2-channel, analog input, class D audio amplifier multichip module (MCM) MA5332MS. Class D audio power amplifiers offer a combination of small size, low heat dissipation, high integration, and excellent sound quality. The new module is a powerful upgrade to its predecessor,…
Diodes launches high-efficiency, class-D stereo audio amplifier
Diodes Incorporated is introducing the PAM8965 class-D stereo, audio power amplifier with an integrated synchronous boost converter. This high-efficiency device is targeted for use in AI-enabled speaker systems and portable musical instruments where elevated output power, extended battery life, and compact construction are all key requirements. Running off a 2.8 to 8.5V supply, the PAM8965…
Audio Transformer
Amazed by the electronic music of your favorite band? Mesmerized by the way suddenly an electric guitar goes as loud as the singer? Like most of know, there is an expert recording engineer present in the studio to make sure that music instruments and the voices make a perfect blend. A critical device that helps in creating this blend is an audio transformer. Works just like any other conventional transformer; audio transformers are designed to work at audio frequencies, i.e. between 20Hz to 20 KHz. interestingly, the initial need to design to such transformer was to enhance long distance voice communication. Now serving essentially for professional musicians, audio transformers stand as one electronic-audio component. This article will cover technical and applicative features of audio transformers explaining how they are different from the conventional counterparts
Audio Tone Control
Various audio tone control circuits have been developed since the evolution of electronic audio systems. Some are being developed as passive tone control and some are active. The difference between them lies in the amplification and attenuation of the signal. An audio tone control circuit with an amplifier integrated with it is called ACTIVE tone…
Controlling Audio Volume & Tone with a Remote Control
Here is the project of controlling audio volume and audio tone (bass and treble) with a remote control designed using microcontroller AT89S52.It is a mono audio controller and to make it stereo similar circuits have to be made for the both LEFT and RIGHT channels. I have not connected the components in a PCB…
Sound generation in audio range using 555 timer
This simple project can be used to generate sound which can be heard through a speaker or a buzzer by connecting either of them to its output. The idea is to [[wysiwyg_imageupload::]]generate a frequency in the audible range from a normal pulse generator. Using the circuit in a battery saving mode so that it can work for a longer duration is made possible by using a 555 IC. This IC is known to work in three different modes: bistable, astable and monostable, and can work efficiently in all three modes. Also, being casted in an integrated circuit format makes 555 a power efficient and it can be stretched to work for a longer duration. Read more to find out how the circuit is constructed and how it works.