AM SDR Transmitter with ESP32 Kit
Build an AM Software-Defined Transmitter from Scratch with the ESP32 SDR Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine transmitting your own AM radio signals using a microcontroller and some clever signal processing. This kit guides you through building a complete software-defined radio transmitter chain using an ESP32's I2S peripheral to generate an AM modulated carrier, with an RTL-SDR dongle on your PC receiving and demodulating the signal. Perfect for final-year engineering projects, amateur radio experimentation, or understanding the core principles of SDR from the ground up.
What You'll Build
A compact AM radio transmitter that converts digital audio into an analog AM modulated signal using the ESP32's I2S DAC and a precision RF lowpass filter. You'll assemble the entire signal chain on prototype boards, enclose it in a durable ABS case, and then verify your transmission using an RTL-SDR dongle and free software on your PC. The result is a fully operational software-defined transmitter that demonstrates key concepts in digital signal processing and RF engineering.
What You'll Learn
- Generating AM modulated carriers using I2S and a PCM5102A DAC
- Designing and building an analog front-end with LM358 op-amps for signal conditioning
- Filtering harmonics with a passive RF lowpass filter for clean transmission
- Verifying your transmitter using RTL-SDR and GNU Radio or SDR# software
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| I2S DAC PCM5102A | 1 |
| LM358 Op-Amp | 2 |
| RF Lowpass Filter | 1 |
| 50? Antenna | 1 |
| 100nF Caps | 10 |
| PCB Prototype Board | 3 |
| ABS Enclosure Box | 1 |
| 5V 2A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for final-year B.Tech ECE/EEE students working on communication engineering projects, Smart India Hackathon participants exploring SDR, and amateur radio enthusiasts in India who want to build their own transmitter from the component level. Also suitable for IIT, NIT, and VIT students tackling advanced embedded systems and RF design assignments.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to start a conversation with our AI companion trained on this project. It walks you through every connection and troubleshooting step. You can also reach us on WhatsApp for human support.
Do I need an RTL-SDR dongle to receive the signal?
Yes, this kit includes only the transmitter chain. You'll need a commonly available RTL-SDR dongle (not included) connected to your PC. The AI companion guides you through software installation and calibration.
Can I modify this to transmit on different frequencies?
The included lowpass filter is optimized for the medium-wave AM broadcast band. With component value adjustments you can retune it, and the AI companion can guide you through those calculations if you want to experiment.
Is soldering experience required?
Yes, this is an advanced kit that requires proficient through-hole soldering. A soldering iron and solder wire are included so you have everything you need to assemble the circuit on the prototype boards.
ESP32 I2S generates AM modulated carrier. RTL-SDR on PC receives and demodulates. Full SDR transmit chain.
What's in this kit
Choose your assembly option:
- Soldering Kit - 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo - 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items