What is wrong with my 2x parallel circuits wired in series? Answered
I am using 11x blue LEDs (3.3 v); 8 of which are wired to one parallel circuit, and I am having problems with the other parallel circuit. The voltage source is 5 volts. Here is a schematic.
| | | | | | | | | | |
When the power source is running the left side lights up, but the right side does not illuminate. The current has to be going through; otherwise, it would be an open circuit and nothing would light. Is this because the voltage needs to be 6.6V? If so, then why does the left side always light up and never the right? All of my LEDs are working.
More information: I am stepping down 120V to 5V .7A and using copper wire with a plastic casing.
EDIT: Please correct my math. Voltage drop across all of them is 2.5 Volts (5V source / 2 circuits with same voltage drop). The current running through each LED on the left, without a resistor, is 87.5mA (700mA / 8 LEDs). The current running through each LED on the right, without a resistor, is 233.3mA (700mA / 3 LEDs). However, the left side is bright and the right side is unlit.
Also, would I use a 125 Ohm resistor (2.5V / .02A) for every LED?