Dear Sir/Madam,
I want to connect a 3V LED with a CR2032 (also 3V battery), why some experienced still recommends to add 50~100ohms resistor? What is the rule of thumb?
Best regards,
Kelvin.
I want to connect a 3V LED with a CR2032 (also 3V battery), why some experienced still recommends to add 50~100ohms resistor? What is the rule of thumb?
Best regards,
Kelvin.