I am using a board as the switch. When my finger touches the top hole, it will turn on the green light, and when I touch the button hole, it will turn on the yellow light.
QUESTION: I burned several blue LED lights when I made this creative design, but I put exactly the same resistor 220Ohms in the circuit. Green LED light survived, but blue light burned. Therefore, I changed 220Ohms to 1K, then it worked. This is a parallel circuit, why green LED light worked, and blue LED not worked?
I learned physics back in middle school, and all of these components(regulator, resistor), units(Volts, Ohms, Amps) are almost new to me. Luckily, after I finished all of the following labs, I kind of figure out all of their functions:)
I used the wrong volt voltage regulator at first, and it is not working. Then when I find the correct one, the LED light turns on. I burned several LED lights because I connected with a small resistor.
Figure 1 is working
Figure 2 is not working because there is no current between resistor and LED light