China Dynamo Radio

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)

The other side view (Lamp or Lantern + power indicator  + )

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