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Opto/Illumination

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LED-5RGB-2 Tri-Color 5mm LEDs - 2 Leads
LED-5RGB-2 Tri-Color 5mm slow cycling RGB LED - 2 Leads
US$0.99

These are 5mm diffused RGB LEDs with only two pins that will slowly change color when voltage and ground is applied.

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35LH004 Bayonet Lamp Socket T3¼
US$1.06
This is a T3¼ lamp socket E10 holder bayonet style.  
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35LH010 Screw Insulated Lamp Socket T3¼
35LH010 Screw Style T3¼ Lamp Socket E10
US$0.83
This is a T3¼ lamp socket holder E10 screw style.  
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1376-ADA NeoPixel Digital RGB LED Weatherproof Strip 30 LED -1m
1376-ADA NeoPixel Digital RGB LED Weatherproof Strip 30 LED -1m
US$29.67
These LED's use about 9.5 Watts max (~2 Amps @ 5V) per meter. The max rating is assuming all the LEDs are on full white, usually the actual current for colorful design is about 1/3 to 1/2 the max current. A good power supply such as our 5V 2A or 10A supply is key!
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COM-11841 LED Holder - 10mm
COM-11841 LED Holder - 10mm
US$0.97
These LED holders accept a 10mm LED and mount into an 35/64" diameter hole.
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COM-11840 LED Holder - 5mm
COM-11840 LED Holder - 5mm
US$0.97
These plastic LED holders have a black finish and only need the LED and the holder to be snapped into place easily and effectively, no screwing anything into place. These LED holders accept a 5mm LED and mount into an 19/64" diameter hole.
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1365-ADA Acrylic Stand for 16x2 Character LCD
1365-ADA Acrylic Stand for 16x2 Character LCD
US$10.42
Made of 3mm black acrylic pieces, with 4 x 1" nylon screws & 4 x nylon hex nuts, it goes together in a jiffy and looks super-spiffy!
Delivery within 2-3 weeks
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DEV-11814 USB-to-Serial Bridge - µUSB-PA5
DEV-11814 USB-to-Serial Bridge - µUSB-PA5
US$26.53
This is a USB to RS-232 bridge converter which is very small and easy to use. It uses a mini-B type USB connector to connect to your PC and is based on the FTDI FT232RQ USB to Serial Bridge IC from FTDI. The μUSB-PA5 allows you to communicate with 4D Systems' screens and controllers.
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MR400-002 16x2 Character LCD Blue LED Backlight
MR400-002 16x2 Character LCD Blue LED Backlight
US$15.33
This is a basic 16 character by 2 line display. White text on Blue background. Utilizes the extremely common SPLC780D parallel interface chipset.
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MR007-005.1 LCD Shield for Arduino 16x2 Blue LED Backlight
MR007-005.1 LCD Shield for Arduino 16x2 Blue LED Backlight
US$34.65

This shield allows an Arduino board to visualize informations on an attractive LCD display with white text on blue backlight. 5 push buttons make possible the implementation of projects where menus are visualized on the LCD display and selections are made by the pressure of the buttons, each of them numbered from 1 to 5.

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KLC-3070RT-24V Red LED - 24VDC
KLC-3070RT-24V Red LED - 24VDC
US$6.29
This is a 24 volt DC red LED.
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161-ADA Photo cell (CdS photoresistor)
161-ADA Photo cell (CdS photoresistor)
US$1.75
CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When its light, the resistance is about 5-10KΩ, when dark it goes up to 200KΩ.
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627-ADA Electroluminescent (EL) Panel Starter Pack - 10cm x 10cm Aqua
627-ADA Electroluminescent (EL) Panel Starter Pack - 10cm x 10cm Aqua
US$43.67

Includes: 10cm x 10cm (approx 4"x4") square panel in Aqua, Portable 4xAAA inverter powerful enough to drive a single panel, 4 x AAA alkaline batteries to power the inverter and panel for 10 hours.

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587-ADA EL wire starter pack - Red 2.5 meter (8.2 ft)
587-ADA EL wire starter pack - Red 2.5 meter (8.2 ft)
US$34.92

This project pack contains: 2.5 meters (over 8 ft) of high-brightness, long-life EL wire in Red, Pocket EL inverter runs on 2 AA Alkaline or rechargeable batteries (not included), 2 inches of heat shink, both 1/8" and 1/4", 2 inches of copper tape, 2 inches of foam tape.

Delivery within 2-3 weeks
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416-ADA White Electroluminescent (EL) Tape Strip -100cm w/two connectors
416-ADA White Electroluminescent (EL) Tape Strip -100cm w/two connectors
US$12.53
The glowing part of the tape is 1 cm wide (the plastic coating is about 1.5cm wide). The other side has an adhesive on it so you can stick the tape onto something.
Delivery within 2-3 weeks
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77 - 91