FM Radio
A battery powered portable FM radio.
Schematic Diagram and Component List
10k Ohm Resistor
2
R4, R5
2.2k Ohm Resistor
3
R1-R3
1N5819 Diode
1
D1
Red LED Lights
1
D2
Green LED Lights
2
D3, D4
105 Ceramic Capacitor
6
C1-C5, C6
22P Ceramic Capacitor
1
C5
47uF Electrolytic Capacitor
2
C7, C8
47UH Inductor
1
L1
32.786kHz Crystal Oscillator
1
Y1
Micro USB Connector
1
J2
3.5mm Aux Audio Connector
1
J3
Toggle Switch
1
J1
Switch
5
S2-S5
GS1299 SO-16 IC
1
U1
TP4056 SO-8 IC
1
U2
3.3V Voltage Regulator
1
U3
Procedures
Place and solder the ICs at their positions.
Place and solder the resistors.
Place and solder the inductor.
Place and solder the ceramic capacitors, the 22P ceramic capacitor is at the position C5.
Place and solder the 47uF electrolytic capacitors.
Place and solder the LED lights, be aware of their polarity.
Place and solder the 1N5819 diode, be aware of its polarity.
Place and solder the crystal oscillator.
Place and solder the switchs.
Place and solder the toggle switch.
Place and solder the micro USB connector.
You could use 3.7V battery or 5V USB cable as the power supply.
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