Uploaded June 2026 | Updated September 2026, 2 weeks ago

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We built our own AI-powered Payment Sound Box inspired by PayTM! 🔥
This DIY sound box can accept UPI payments & speak out the amount instantly, generate dynamic QR codes of any fixed amount, and even answer AI-powered questions about your total revenue — just ask it out loud in natural language!

🔧 Hardware Used:

ESP32-S3 (16MB Flash, 8MB PSRAM) • 3.5" TFT LCD • 4x4 Hex Keypad • MAX98357 Amplifier • 8Ω Speaker • INMP441 Mic • TP4056 • Boost Module • Li-ion Battery

If you got your PCB desgin ready, well do try out NextPCB for your PCB orders
nextpcb.com/?code=techiesms
nextpcb.com/dfm

⚡ Platforms Used:
RazorPay Webhooks • Adafruit IO MQTT • ElevenLabs STT • OpenAI LLM + TTS • ArduinoJSON

📌 Watch our complete UPI Payment Series to understand how this works: youtube.com/watch?v=dSX5dhyHo3o&list=PLruzZCuhcsGPPxm_ERzmICGNRBlTvd2l9

📦 Components available on our store: techiesms.com

🎓 Courses: techiesms.graphy.com

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🔌 Important Links

Try out NEXT PCB for your next PCB order
nextpcb.com/?code=techiesms
nextpcb.com/dfm

Code & Schematic - github.com/techiesms/AI-Payment-Sound-Box-

Flasher Link - techiesms.github.io/AI-Payment-Sound-Box-

UPI Payment System Playlist - youtube.com/watch?v=dSX5dhyHo3o&list=PLruzZCuhcsGPPxm_ERzmICGNRBlTvd2l9
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🛒 Components used in this video

TDT LCD Display - techiesms.com/product/3-5-inch-tft-touchscreen-display
ESP32 S3 Module - techiesms.com/product/esp32-s3-wroom-n16r8
MAX98357 Amplifier - techiesms.com/product/max98357-i2s-3w-class-d-amplifier
INMP441 Microphone - techiesms.com/product/inmp441-microphone-module-i2s
TP4056 Module - techiesms.com/product/tp4056-type-c
5V Boost Module - techiesms.com/product/dc-dc-boost-converter-5v-8v-9v-12v
4x4 Hex Keypad - techiesms.com/product/4x4-matrix-membrane-type-keypad
Cavity Speaker - techiesms.com/product/8ohm-2watt-space-cavity-speaker
Pushbutton - techiesms.com/product/tactile-pushbutton-switch-6x6x8mm-pack


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🔥 Don’t miss this on techiesms
⚡ price drop deals (limited stock)
👉 techiesms.com/product-category/price-drop
🆕 newly launched products
👉 techiesms.com/elementor-15217

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💡 Support & exclusive perks
support techiesms and unlock early access & members-only content 🙏
👉 patreon.com/techiesms

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⏱ Time Stamps

00:00 AI Payment Sound Box — Better Than PayTM?
00:48 Hardware Components Used (ESP32 S3, Display, Mic & More)
01:35 Circuit Schematic & PCB Design Explained
03:04 PCB Assembling & Soldering Process
03:34 Complete Code Logic — UPI Webhooks + AI Integration
08:48 Flashing Code to ESP32 S3
09:41 3D Printed Case Design & Assembly
10:39 Setting Up API Keys & Device Configuration
14:05 Demo 1 — UPI Payment with Open Amount QR Code
14:53 Demo 2 — Fixed Amount QR Code (Tamper Proof)
15:55 Demo 3 — AI Assistant Answering Revenue Questions 🤯
18:24 Why We Are NOT Selling This Project

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🎥 🎙 My Video Gear 🎙 🎥
Camera – Canon 750D
Lens – 50mm f/1.8 STM: amzn.to/32gqnsi
Key Light – Godox SL60W: amzn.to/3522mHe
Tripod – amzn.to/3uNhC4H
Microphone – Zoom H1N: amzn.to/3Osh12A
Editing – Final Cut Pro X on MacBook Pro: amzn.to/3vHcSyJ
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▶️ Secondary Channel: youtube.com/@sachinsoni2684
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