I have some low cost China made Dynamo Radios, usually with LED light(s).
Model: RD339. No brand (Generic).
This model has not only Radio function but many other functions and not only Dynamo power but also many other power sources.
Functions
1) FM-AM Radio with a loudspeaker
2) Flash Light (far sight)
3) Lamp (near sight for seeing / reading in dark)
4) Siren or Burglar Alarm (120dB)
5) Phone Battery Charger (DC 5V output - USB)
Power sources
1) Dynamo (Hand Crank Power Generator)
2) Solar panel (I have not tried)
3) DC 5V Micro USB
4) Three AA size Batteries (4.5V)
Theoretically, in a real emergency situation and no AA size Batteries inside you can get the above five functions by your hand movement - 1) Dynamo (Hand Crank Power Generator). But for a rather short period one time though you can continue your hand movement to get the power you need theoretically, in a real emergency situation.
Front view
Rear view
Side View (Flash Light)
Inside
Radio One Chip IC - C9611 (China brand: CACHIP) SOP16
This is DSP Radio IC so no capacitors / coils for tuning seen though a PVC (Poly Vari-Con, light green square one) is used.
Audio Power Amp IC - 8002A (SOP8) －３W
There are many Diodes
M1 (Rectifier) 9 pcs
SS14 Schottkey 5 pcs
Glass Seal 7pcs
Zener Diode (Melf) 2pcs
Unknown 2pcs
U1 - DPAK near a Power coil of 4R7.
No Siren IC found.
Li-ion Battery - hidden under the PCB.
sptt
