Elenco Projects 306-511 - Manual (Page 9)

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Project #306
OBJECTIVE: To build a one-IC AM radio.
Turn on the slide switch (S1) and adjust the variable capacitor (CV) for
a radio station. Make sure you set the variable resistor (RV) control to
the left for louder sound.
AM Radio
Project #307
OBJECTIVE: To build a working FM radio with adjustable
volume.
Turn on the slide switch (S1) and press the R button. Now press the
T button and FM module (FM) scans for a radio station. When a
station is found, it locks on to it and you hear it on the speaker (SP).
Adjust the volume using the adjustable resistor (RV). The resistor
controls the amount of signal into the power amplifier IC (U4). Press
the T button again for the next radio station. The module will scan up
to 108MHz, the end of the FM band, and stop. You must then press
reset (R) to start at 88MHz again.
Adjustable Volume
FM Radio