In this DIY, we are demonstrating a project of an AM Radio Receiver with MK484 IC. The MK484 AM radio is a completely functional AM radio detector on a chip. The MK484 is well supported by numerous electronics specialists. It is advantageous in that it performs well with minimal discrete parts, and can run from a solitary 1.5-volt cell. The yield of the MK484 can likewise connect to the base of a transistor to give more prominent amplification as a class-A amplifier. On the other hand, the LM386 sound amplifier might utilize to drive a small speaker.
MK484 IC
Markedly, the MK484 is a solid monolithic IC available in a TO92 package. It can likewise use as a one-chip radio receiver, with high affectability, and top-notch AM radio. Exceptional highlights of the IC incorporate low supply voltage and stable operation with 11V, low drain current, lightweight, and Wide AGC Range.
Hardware Components
The following components are required to make AM Receiver Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1 | IC | MK484 | 1 |
| 2 | Coil | 55 turns | 1 |
| 3 | Variable Capacitor | 130pF | 1 |
| 4 | Transistor | 9014 | 1 |
| 5 | Resistor | 100K, 1K, 270 ohms | 2, 2, 1 |
| 6 | Ceramic Capacitor | 0.1µF, 0.01µF | 1, 1 |
| 7 | Electrolytic Capacitor | 0.1µF, 47µF | 1, 1 |
| 8 | Headphones | – | 1 |
| 9 | Battery | 1.5V | 1 |
MK484 IC Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of MK484
AM Receiver Circuit
Working Explanation
This is the circuit diagram of a good quality AM radio receiver circuit. The core of the circuit is MK484 AM radio IC. It is a high sensitivity and excellent IC, it has just three leads and comes in the TO92 package, and requires just a couple of outer parts since all the essential hardware like RF amplifier, AGC, and detector are joined inside the IC. The circuit can be worked uniquely on 1.5V DC and has an extremely low current utilization of just 0.3mA so the 1.5volt battery will last over a hundred hours. Try not to give more than 1.8volts to the IC. The Coil L1 is equivalent to 55 turns of 0.315mm (30 swg) enameled copper wire twisted on a 10mm x 100mm long ferrite rod.
Applications and Uses
- AM is generally used for broadcasting on the long, medium, and short wavebands.
- It is easy to demodulate the signal by using the MK484 AM radio receiver
- These MK484 AM radio receivers equipped for demodulating amplitude modulation are modest and easy to fabricate.
