User manual

62
15. Using a Return-Current Block
Experimenting setup: Solar module, plug board, electrolytic capacitor 1.000 µF,
Schottky diode, resistor 100 Ω, LED red
During solar charging of a rechargeable battery, the charge would „reverse“ unload
through the solar module again if it didn‘t have the protective diode. Therefore, a
return current lock in the form of a diode must be inserted. The diode works like a
valve that only permits the energy current to ow in one direction while preventing
it in the other.
To clarify the principle, perform the experiment with the electrolytic capacitor
1,000 µF (remove the rechargeable battery from the holder for this). In addition to
the current storage electrolytical capacitor, plug an LED and a dropping resistor
into the plug board. This way, you can examine the storage effect depending on
the return current diode.
Fig. 056: Principle of the circuit with blocking diode