I recently purchased a rocker power switch from RadioShack (103-R13-135B-02R-EV) and it works great. However, even when the switch is off, the small red LED stays on. Is this normal? Won't this unnecessarily drain my 9V battery?
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I believe that this is the internal schematic of your switch:
Based on that, if you want to wire the switch so that the light turns on and off with the switch, you would wire it as follows:
- Pin 1: +Voltage power in
- Pin 2: Switched power for your circuit
- Pin 3: 0 volts
I'm guessing that you have pin 1 and 2 reversed, which would cause the LED to be always on.
And to answer your question, yes, if the LED is on, you are draining your battery. :)
answered Aug 6 '14 at 20:34
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\$\begingroup\$ I will wire this up when I get home, and post back if it doesn't work. \$\endgroup\$ – ZackB Aug 6 '14 at 20:41
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\$\begingroup\$ Except this is a Neon light and not an LED on the schematic. The O.P. seems to be providing a datasheet after datasheet, which show something similar, but there is no evidence that they actually represent the physical part that he has got. On that note, I stop following this wild goose chase of a question. \$\endgroup\$ – Nick Alexeev♦ Aug 6 '14 at 20:56
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\$\begingroup\$ @NickAlexeev Yes, the schematic I grabbed has the wrong symbol for the light. However, I believe that RadioShack only sells the LED version of this switch, so I still think my answer is correct. \$\endgroup\$ – Ben Miller - Reinstate Monica Aug 6 '14 at 21:14
103-R13-135B-02R-EV [...] Illum. Green/Neon. The datasheet which you've linked, however, doesn't show the LED (drawing at the bottom-right of the first page). It shows Neon. However, you are saying that the illuminator had lit up from 9V supply. A Neon lamp would not light up at such low voltage. Is it possible that you have the part number (model number) confused? \$\endgroup\$ – Nick Alexeev♦ Aug 6 '14 at 19:39