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Asked ChatGPT if direct sunlight can reverse voltage on an LED:
Direct sunlight can act as a reverse voltage for an LED if the LED is kept in reverse bias condition. This means that the positive terminal of the power source is connected to the cathode (negative) of the LED and vice versa1. In this case, sunlight can generate a small current in the opposite direction of the power source1. This is similar to how a solar cell works2.
However, most LEDs have a low reverse breakdown voltage, which means they can be damaged by an applied reverse voltage above this threshold3. The reverse breakdown voltage of an LED is typically around 5 V2. Therefore, it is not advisable to expose an LED to direct sunlight when it is in reverse bias condition.
To protect an LED from reverse voltage damage, you can use a regular diode or another LED in parallel with it in the reverse direction. This will limit the reverse voltage across the LED to about 0.65 V or 1.2 V respectively4.
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