Project Hub /Test & Measurement Instrumentation/Multimeters, Voltmeters & Ammeters/88.00MHz-108.00 MHz FM Radio Receiver Using AN 7223

Beginner

ANALOG / DISCRETE

< ₹500

3 – 6 Hours

Partial Kit

88.00MHz-108.00 MHz FM Radio Receiver Using AN 7223

A simple FM radio receiver built around the 18-pin IC AN 7223 and a BF494 transistor, designed to tune frequencies from 88.00MHz to 108.00MHz using readily available 5.5MHz components.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: Microcontroller IC (DIP) / Chip
Transistors (BC547 / 2N2222 / TIP / MOSFET)
Inductors / Coils / Ferrite
GSM / GPRS SIM800L
Capacitors
Header Pins / Terminals / Connectors
Perfboard / Veroboard / Stripboard
Speaker / Audio Amplifier

Browse all components

How It Works

The 88.00MHz-108.00 MHz FM Radio Receiver project operates by capturing standard commercial frequency modulation radio waves through a 75cm wire antenna. The front-end utilizes a BF494 NPN transistor working alongside a 2-22pF trimmer capacitor and custom 23 SWG copper wire to form the RF tuning stage, allowing the circuit to sweep across the 88MHz to 108MHz broadcast band. Once the desired frequency is selected, the signal is routed into the specialized AN 7223 18-pin integrated circuit. This dedicated receiver IC handles the intermediate frequency processing, utilizing a 5.5MHz IFT coil and a 5.5MHz ceramic filter for frequency selectivity and demodulation. A variety of supporting passive components, including numerous ceramic and electrolytic capacitors (such as the 100uF/25V, 4.7uF, 203 ceramic, 22uF/25V, 10uF/25V, 10pF, .01uF, 33pF, and 102 types) alongside resistors like the 2K2, 470K, and 470 values, are strategically deployed around the AN 7223 for decoupling, biasing, and filter conditioning. Finally, the extracted audio signal is sent to an LM386 audio amplifier stage connected to a speaker to drive audible sound output. Everything is assembled cleanly onto a compact 5cmx7cm Zero PCB and powered via a 2-pin connector.

Why Build This

Gain practical undergraduate-level experience in analog radio frequency (RF) design and intermediate frequency (IF) demodulation using dedicated ICs.

Understand the integration of discrete semiconductor stages, such as the BF494 RF front-end, with integrated receiver blocks like the AN 7223.

Build a fully functional, portable FM receiver to analyze signal tuning, filtering, and audio amplification hardware.

Real-World Application

Portable FM radios, vintage or custom audio receivers, hobbyist RF communication projects, and educational electronics learning.

Skills You'll Learn

RF tuning

intermediate frequency filtering

transistor biasing

audio amplification

printed circuit board assembly

Safety Precautions

Exercise caution when using a 25W soldering iron to avoid burns. Ensure correct polarity on electrolytic capacitors before applying power.

Technology Tags

FM RADIO

AN 7223 IC

BF494 TRANSISTOR

ANALOG ELECTRONICS

RF CIRCUITRY

SOLDERING

AUDIO AMPLIFICATION

Frequently Asked Questions

Do I need to program any microcontrollers for this radio receiver?

No, this is a purely analog hardware project. There is no software or programming required.

What is the purpose of the 23 SWG copper wire in this circuit?

The 23 SWG copper wire is used to hand-wind the custom inductor coil required for the RF tuning circuit alongside the BF494 transistor and trimmer capacitor.

How do I ensure the audio amplifier works properly with the receiver?

The extracted audio signal from the AN 7223 stage is fed directly into the LM386 audio amplifier circuit, which then drives the connected speaker for volume output.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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