Dear radio friends,
I would like to present here my second DIY project with alternative energy.
It´s a small AM / FM solar radio.
In my stash I had some old radio parts and they are actually for salvaging
were too good.
It includes a rest of a FM receiver with the IC TA2003 / P, a ferrite, little housing and my favorite AM-IC TA7642
Also a solar cell from an old garden lamp was available.
Unfortunately, I realized that the solar cell has inside a loose connection.
There was no chance to use it. So I buy a new one with 4V/40mA power value.
This cell is also much smaller and fit better into the black housing.
solar panel 4V_40mA.JPG
The two button- cell- accumulator, I wanted to buy, should cost 29 €. I decided
me to destroy a 8.4V battery pack (9V Block) and take out two 1,2 V cells and connect it
I try also to power up the radio, with my lovely goldcap capacitor 1F/2.5V. But there is no chance, because the current for the FM part is nearly 11mA !!
In normal sunshine radio works even without accumulator.
loading solar energy.JPG
Here the complete documentation. Diagram and inside view.