I'm flummoxed. I have 33 LEDs (17 "lagoon blue" and 16 white) wired in parallel on 22 AWG stranded stereo wire. Blue LEDs have 20 ohm resistor in series, white have 27 ohm. The circuit has a slide switch in-line and the whole thing is powered by a 3.7V Li-Ion battery.
I did this once before, no slide switch and only 21 white LEDs w/ resistors. My on/off was to unhook the battery. Worked like a charm.
In my current project the big changes are 1) 12 LEDs added 2) two different kinds of LEDs used and 3) slide switch added.
Now, when I put a protected Li-Ion battery in the circuit the LEDs only light if I insert the battery while the switch is in the ON position. Then, if I switch the circuit off, everything turns off...and when I switch it back on, nothing. I have to pull out the battery and put the switch in its on position, then reassemble for the LEDs to light. In addition, if I leave it on, two of the cyan LEDs start to turn deep blue.
If I put in the unprotected battery it will turn back on but the LEDs fade on slowly to full brightness, and the battery gets hot.
What is going on?
UPDATE One battery is protected AW Li-Ion 14500 3.7V 750mAh Other is unprotected UltraFire Li-Ion 14500 3.7V 1200mAh
UPDATE 1/16/18 FYI this is an LED hoop. I disconnected the switch and ran straight from AW battery. LEDs still change color from cyan to blue, but sounds like that may be a separate issue with my resistor choice. Hard to fix or test that now. I wired another switch and the same issue occurred. Here is a sketch not to scale.