In this tutorial, we are demonstrating an AM radio receiver in detail. After reading this tutorial you will be able to make your own which will give you so much enjoyment and information in the field of electronics. However, in this DIY, we are using three transistors BC548. Moreover, the transistor BC548 is the main component of this AM Radio Receiver. Furthermore, the BC548 is a broadly useful NPN bipolar junction transistor regularly utilized in European and American electronic hardware.
Therefore, it is the primary sort of bipolar transistor and is frequently highlighted in structures inside electronic magazines where a universally useful transistor requires. Hence, radio receivers are electronic components of radio which receive radio waves and convert them into a usable form. Thus, in amplitude modulation (AM), the strength of the radio signal changes by the audio signal.
Hardware Components
The following components are required to make AM Receiver Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1 | Transistor | BC548 | 3 |
| 2 | Crystal Earphone | – | 1 |
| 3 | Coil | 80 turns | 1 |
| 4 | Variable Capacitor | 250pF | 1 |
| 5 | Resistor | 1K, 100K | 2, 2 |
| 6 | Capacitor | 10nF, 100nF | 1, 3 |
| 7 | Battery | 1.5V | 1 |
BC548 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of BC548
AM Receiver Circuit
Working Explanation
Accordingly, the circuit that appeared above is an AM radio Receiver with three transistors. Moreover, the circuit is utilizing three BC548 transistors and fewer other parts. You can also discover other AM receiver circuits on this website utilizing ICs like Simple AM Radio Circuit Using TA7642 IC, AM Radio Receiver with MK484 IC, and so forth yet on the off chance that you cannot discover these ICs in your nearby gadgets shop than this circuit will work for you.
Furthermore, the performance of the circuit is the same as the circuits utilizing AM radio ICs. However, in this tutorial we are using a coil, three BC548 transistors, alongside two 1K and two 100K resistors, three 100nF and 10nF capacitors, a 250pF capacitor, crystal earphones, and a 1.5V battery. Moreover, the coil L1 is equivalent to 80 turns of 30 s.w.g enameled wire coiled on 10mm breadth and 45mm long ferrite pole. You can likewise attempt other MW radio coils you have in savings.
Applications and Uses
AM radio receivers are likewise used for long-distance international radio broadcasting. Receivers nowadays are also used as Terrestrial television receivers, Satellite TV receivers. Receivers are also used in Cellphone, Cordless phones, walkie-talkies, etc.
