Here, the MAX98357A amplifier is used with the MCU ESP32 development board, and Google API is used to convert the text into speech.
The cost-effective MAX98357A I2S amplifier (mono) is connected to the ESP32. Although stereo models like the UDA1334A are available, the mono version is chosen for simplicity. The I2S amplifier uses three GPIO pins, which can be any pins except for 34 and 35 (input-only pins). A 4-ohm speaker is connected to the output, and it is essential to verify the board specifications. The speaker’s ‘+’ and ‘-’ terminals must be connected correctly to avoid distortion. The author’s prototype is shown in Fig. 1, and the necessary components are listed in the Bill of Materials table.
Circuit diagram
This story is from the November 2024 edition of Electronics For You.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Sign In
This story is from the November 2024 edition of Electronics For You.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Sign In
STK435 IC-Based STEREO AMPLIFIER
This stereo AF amplifier uses the STK435 IC, a highly popular choice due to its simplicity.
A SEWER DRAIN SHIELD For Smart Cities
Drainage systems are vital for storm water management but often transport pollutants, especially plastics, to rivers and oceans, harming ecosystems.
ESP32 SPEECH FUNCTION: Text To Speech
Speech capability in technology primarily has two dimensions: text to speech (TTS) and speech to text (STT). This device focuses on TTS.
World's Smallest Programable INDUSPHONE DESIGN
This is the second part of designing the world’s smallest phone, where the UI is integrated with the basic functions of the phone.
FLAME-SENSING FIRE ALARM Using An Arduino Nano
Fire safety alarms are crucial in both residential and industrial environments.
loT-Based Distribution Transformer CONDITION MONITORING SYSTEM
The proposed IoT-based distribution transformer condition monitoring system enables real-time monitoring of distribution transformers, identifying such deviations as overload conditions and overheating.
Wi-Fi 6 AND Wi-Fi 7 Powering The Next Wave of Smart Connectivity
Wi-Fi 6 leads with faster data rates and reduced latency while upcoming Wi-Fi 7's backward compatibility will facilitate gradual upgrades from Wi-Fi 6, easing transitions. However, advanced features like multi-link operation (MLO) and ultra-low latency may command a premium, making Wi-Fi 7 suited for high-end applications.
CHARGE FORWARD: High-Voltage Batteries And MSMEs Can Fuel INDIA'S EV REVOLUTION
A nuanced explanation of low- and high-voltage EV batteries by Dr Gokhale, Vice President for Battery Technology at JSW Energy, illuminates their advancements and influence. The essential role of MSMEs and academia in developing a strong EV ecosystem emerges, marking their significance for India's push towards self-reliance in this innovative field.
"MILES TO GO Before I Sleep"
A teacher illuminates the path to success through the light of knowledge, yet some teachers extend that light to society through their contributions and research. Known as the architect of the modern M3 electronic voting machine (EVM) and the voter verifiable paper audit trail (VVPAT) that transformed India's democratic process, Prof. (Dr) Rajat Moona's journey began in the modest town of Bareilly. Here is his story, as recounted to and written by EFY's Yashasvini Razdan.
STARTUPS & INNOVATORS
1 One Charger To Charge All Your Devices | 2 Harnessing AI Technology For Efficient Pest Management | 3 Wireless Light-Based Communication With Velmenni's Technology
