For more detail, please visit Application of AM Radio This circuit can be used as a final project for electronics students. The voltage through C3 is fed back as an automatic gain control to the base of Q1. The capacitor C3 is charged through Q2 and feed Q1 through Resistor (R1). The speaker is connected to the collector of Q2 for the output of amplified singles through C4. The amount of this feedback is adjustable with a variable resistor (VR1). At the emitter of Q1 (NPN transistor), a portion of the signal is fed back to L1. In the circuit, Q2 is separate for audio output. Amplification of the Audio and regeneration In the collector terminal of Q1, the RF component is shorted to ground through the capacitor (C2) 470pf. After feeding, Q1 amplifies modulated signals and demodulates the signal. Modulated RF voltage developed through the tuned circuit is given the transistor (Q1) 2n2222 through the coupling capacitor (C1) 0.2uf. RF component of Simple AM Radio Receiver Circuit The circuit diagram of a Simple and homemade Am Radio Circuit is given below with total detailed components. Ref DesĬircuit Diagram of Simple AM Radio Receiver Now I will describe a more basic form of VLF-LF receiver.
SIMPLE VLF RECEIVER CIRCUIT SERIES
Frequency can be adjusted according to the Component’s powers and formula. A Simple Regenerative VLF-LF Receiver by Lloyd Butler VK5BR (Originally published in 'Amateur Radio', January, 1992 ) Introduction In an earlier issue of of Amateur Radio, I described a superheterodyne receiver for the VLF-LF bands, This was followed by a series of articles on front end tuning and loop aerials for these bands. This “tank” circuit can be adjusted at the desired AM frequency.Ĭomponents required for Simple AM Radio Receiver Circuitįollowing Components required for this simple AM Radio Circuit. The variable capacitor (VC1) in parallel with the coil (L1) acts as a tunable resonant circuit. Mediumwave stations cab be listened to in your area through this circuit. A small and simple AM Radio project with only 2 transistors.
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