Re: Running LED off 9.3 Volts AC

On Nov 23, 1:00 am, "Dave.H" <the19...@xxxxxxxxxxxxxx> wrote:
I have an upcoming project involving running three LEDs off a single 9
volt battery, what resistors would I need, and would I also need a
capacitor, as in this circuit?

The specifications for the LED's I am planning to use, (the same one's
I used for the radio dial) are

5mm (T1 1/2) round with flange
16,000mcd (typical) output
Water Clear Lens
High Brightness
620 - 625nm Wavelength (Orange-Red)
15o Viewing Angle
Forward voltage, Vf = 2.0V (min), 2.3V (max)
Forward current, If = 20mA

I built this circuit, works excellent, substituted the red LED's for
some 6500 mcd orange ones, the switch is a push button 250 volt
"lampswitch" this can only be installed on the positive battery lead
not the negative (has only two terminals), this won't drain the
battery when the unit is off will it? If so, I'll just install
another switch on the negative side.
.

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