Hi all, i would like to ask a question again.
Please refer to my attachment. Why is it that when we want to light up LEDs we have to use circuit 3. Why not circuit 1 and 2. Is there any difference? The voltage across the LED should be the same? [5V times (resistance of LED + resistance of resistor) / (resistance of LED)] shouldn't the voltage be the same in all cases?
Would love to build the circuit like in circuit 1. Saves a lot of resistors. Thank you.
Please refer to my attachment. Why is it that when we want to light up LEDs we have to use circuit 3. Why not circuit 1 and 2. Is there any difference? The voltage across the LED should be the same? [5V times (resistance of LED + resistance of resistor) / (resistance of LED)] shouldn't the voltage be the same in all cases?
Would love to build the circuit like in circuit 1. Saves a lot of resistors. Thank you.
Attachments
-
61.4 KB Views: 20