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LED's |
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Light
emitting diodes, commonly called LEDs, are real
unsung heroes in the electronics world. They do
dozens
of
different jobs and are found in all kinds of
devices. Among other things, they form the numbers
on digital
clocks,
transmit information from remote controls, light up
watches and tell you when your appliances are
turned on.
Collected together, they can form images on a jumbo
television screen or illuminate a traffic light.
Basically,
LEDs are just tiny light bulbs that fit easily into
an electrical circuit, but unlike ordinary
incandescent bulbs, they don't have a filament that
will burn out, and they don't get especially hot.
They are illuminated
solely by
the movement of electrons in a semiconductor
material, and they last just as long as a standard
transistor. Since LED's
are becoming so popular these days, Farnsworth
Electronics, Inc. carries a wide
variety of these light emitting
diodes. Don't forget we also carry LED flashlights
and LED exit light bulbs. |
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We've got one of
our featured vendors, Philmore Manufacturing's
catalog available online. |
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Click here to
see the catalog. |
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Click here for
NTE brand LED's |
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LED's (Philmore brand) |
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The LED ( light emitting diode) offered in this
section are without
mounting hardware, or
discrete devices. The LED consists of four
components: a lead frame, a dice (or LED chip), and a fine wire bond
which
is encapsulated in an epoxy base.
(see Below)
Depending on the chip used, the observer will
see
a monochromatic red, green, orange, yellow or
blue light. There are no
moving parts, so these
devices are considered a “solid state device”.
The LED’s operate on from 1.7V-2.5V if you need
the lamp to operate at
a higher voltage a
current limiting resistor is needed. The value
of the
resistor will vary depending upon the
desired voltage and whether it
is
AC or DC volts. Each color of LED works at a
different
operating current which will change
the value of the resistor. |
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Blinking LED’s
All of these devices operate @ 25 ma, 3 - 10V DC and are
typically driven by TTL or C-MOS circuits
with no external
circuit needed. |
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5mm (T-1-3/4) |
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Part
# |
Pulse Rate
(VDD=5V) Hz |
LED
Color |
Viewing
Angle |
Luminous
Intensity |
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11-672 |
2.4V |
Bright Red |
45
degree |
12.0 |
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11-674 |
2.4V |
Yellow |
45
degree |
35.0 |
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11-675 |
2.4V |
Green |
45
degree |
40.0 |
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Regular LED's (non blinking) |
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3mm (T-1) Round |
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Part
# |
Forward Current (ma) |
Max
Forward Voltage |
Typical Voltage |
LED
Color |
Viewing Angle |
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11-602 |
20 ma |
2.0 V |
1.7 V |
Red |
35
degree |
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11-604 |
20 ma |
2.6 V |
2.1 V |
Yellow |
35
degree |
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11-605 |
20 ma |
2.6 V |
2.2 V |
Green |
35
degree |
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5mm (T-1-3/4) Round
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Part
# |
Forward Current (ma) |
Max
Forward Voltage |
Typical Voltage |
LED
Color |
Viewing Angle |
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11-611 |
20 ma |
2.0 V |
1.7 V |
Red |
35
degree |
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11-612 |
20 ma |
2.6 V |
2.2 V |
Bright Red |
35
degree |
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11-614 |
20 ma |
2.6 V |
2.1 V |
Yellow |
35
degree |
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11-615 |
20
ma |
2.6
V |
2.2
V |
Green |
35 degree |
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12mm Round |
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Part
# |
Forward Current (ma) |
Max
Forward Voltage |
Typical Voltage |
LED
Color |
Viewing Angle |
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11-662 |
20 ma |
2.6 V |
2.2 V |
Bright Red |
50
degree |
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11-663 |
20 ma |
2.6 V |
2.0 V |
Orange |
50
degree |
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11-664 |
20 ma |
2.6 V |
2.1 V |
Yellow |
50
degree |
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11-665 |
20
ma |
2.6
V |
2.2
V |
Green |
50 degree |
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Infrared Emitting
Diodes
These diodes are used in remote controls, Photo detectors,
smoke detectors, etc.
3 mm (T-1) @ 50ma
Part # 11-680, 1.6V max. forward voltage,
1.4V typical voltage, 30 degree viewing angle
5 mm (T-1 3/4) @ 50 ma
Part # 11-681, 1.6V max forward voltage,
1.4V typical voltage, 45 degree viewing angle |
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Rectangular LED's |
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2mm X 5mm X 7mm |
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Part
# |
Forward Current (ma) |
Max
Forward Voltage |
Typical Voltage |
LED
Color |
Viewing Angle |
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11-642 |
20 ma |
2.0 V |
1.7 V |
Red |
120
degree |
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11-643 |
20 ma |
2.6 V |
2.0 V |
Orange |
120
degree |
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11-644 |
20 ma |
2.6 V |
2.1 V |
Yellow |
120
degree |
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11-645 |
20
ma |
2.6
V |
2.2
V |
Green |
120 degree |
 click to enlarge |
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Square LED's |
| 8mm X 8mm X 12mm |
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Part
# |
Forward Current (ma) |
Max
Forward Voltage |
Typical Voltage |
LED
Color |
Viewing Angle |
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11-632 |
20 ma |
2.6 V |
2.2 V |
Bright
Red |
140
degree |
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11-633 |
20 ma |
2.6 V |
2.0 V |
Bright Orange |
140
degree |
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11-635 |
20
ma |
2.6
V |
2.2
V |
Bright Green |
140 degree |
 click to enlarge |
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Press in Holders (to
fit holders, hold flangeless LED's snuggly into mounting
hole) |
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 click to enlarge |
# 11-400
(3.5mm LED for 5.5mm hole)
# 11-401
(5mm LED for 6.2mm hole)
# 11-404
(5mm LED for 6.2mm hole with lamp support) |
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90 degree Surface Mount
Holders (mount LED's at 90 degrees to PC boards) |
 click to enlarge |
# 11-409 (3mm single)
# 11-410 (5mm single)
# 11-412 (5mm dual) |
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5mm LED Lamp
Holder
The holders hold
a 5 mm LED (T-1 3/4). They are a chrome
recessed style holder which mounts into a 8.2 mm hole with a
hex
nut. |
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# 11-480 |
 click to enlarge |
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Silicon Photo Transistors
These devices are an electronic switch. When this unit is
activated current is allowed to flow through
the device.
These items are used in Optical encoders, Automatic Control
Systems, Photo Detectors
and other applications where an
optical switch is needed. |
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3mm (T-1) |
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Part
# |
Max Breakdown Voltage |
Typical Voltage |
Typical Carry Current |
Viewing Angle |
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11-690 |
30V |
5 V |
20 ma |
30
degree |
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5mm (T-1-3/4) |
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Part
# |
Max Breakdown Voltage |
Typical Voltage |
Typical Carry Current |
Viewing Angle |
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11-691 |
30V |
5 V |
20 ma |
35
degree |
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Bi-Polar 8mm LED
Lamps are in a recessed chrome bezel which holds a 8 mm LED
that operates at 2V. The LED glows Red if current is applied
in one direction and Green if applied in the other direction |
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 click to enlarge |
# 11-352 red/green |
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LED
Panel Lamps (Philmore brand) |
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Miniature Snap-in Indicator
Miniature snap-in panel lamps with a LED lamp and a built-in
resistor for 12V DC operation.
The device is 8.6 mm in
diameter and snaps into a 8 mm hole. |
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 click to enlarge |
# 11-382 Red
# 11-383 Orange
# 11-385 Green |
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3 mm LED in Dome Chrome Bezel
These panel lamps are made to operate on 2V DC and need a
resistor for any other voltage.
They have a chrome Dome
shaped Bezel which hold a 3 mm LED. The lamp mounts into a
6.5 mm
mounting hole with a hex nut. |
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# 11-362 Red
# 11-363 Orange
# 11-365 Green |
 click to enlarge |
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5 mm LED in Dome Chrome Bezel
These panel lamps are made to operate on 2V DC and need a
resistor for any other voltage.
They have a chrome Dome
shaped Bezel which hold a 5 mm LED. The lamp mounts into a
8.5 mm
mounting hole with a hex nut. |
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 click to enlarge |
# 11-372 Red
# 11-373 Orange
# 11-375 Green |
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3 mm LED Lamp Holder
The holders hold a 3 mm LED (T-1). They are a chrome
recessed style holder which mounts in a 6.2 mm hole with a
hex nut. |
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# 11-450 |
 click to enlarge |
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3 mm LED in Recessed Chrome Bezel
These panel lamps are made to operate on 2V DC and need a
resistor for any other voltage.
They have a chrome recessed
shaped Bezel which hold a 3 mm LED. The lamp mounts into a
6.5 mm
mounting hole with a hex nut. |
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 click to enlarge |
# 11-302 Red
# 11-303 Orange
# 11-304 Yellow
# 11-305 Green |
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5 mm LED in Recessed Chrome Bezel
These panel lamps are made to operate on 12V DC and has a
built-in resistor. They have a chrome
recessed Shaped Bezel
which hold a 5 mm LED. The lamp mounts into a 6.2 mm
mounting hole
with a hex nut. |
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# 11-312 Red
# 11-314 Yellow
# 11-315 Green |
 click to enlarge |
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5 mm LED in Dome Chrome Bezel
These panel lamps are made to operate on 2V DC and need a
resistor for any other voltage.
They have a chrome Dome
Shaped
Bezel which hold a 5 mm LED. The lamp mounts into a 8.5 mm
mounting hole with a hex nut. |
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 click to enlarge |
# 11-306 Red
# 11-307 Orange
# 11-308 Green |
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NTE brand LED's |
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NTE, Inc. has a
large listing of discrete LED indicators. Click on
the NTE logo below for details |
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