2007-12-27 02:07:00 · 2 answers · asked by mays o 1 in Science & Mathematics ➔ Engineering
Your question makes no sense. What is the system you are referring to that creating a "red light" would be a problem? I haven't a clue as to what you are referring to since I am not privy to the text or question posed that you are asking about.
Off hand, get a 3 volt battery, such as a lithium ion coin cell, a holder for it, a couple of clip leads a small resistor, about 150 ohms should do quite well and a red LED. Properly connect it all together and you will have a light source that produces a red colored light. If you want more than that, then give the details needed for the problem rather than assume that people know what you are asking about.
2007-12-27 04:43:21 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A red light is generally either a 'power on` indicator
or a trouble indicator.
If you don't specify the "system", we've got no
chance of answering or trouble-shooting.
2007-12-27 16:03:09 · answer #2 · answered by Irv S 7 · 0⤊ 0⤋