Opto/Illumination

US$7.68
 These 1" tall 4-digit 7-segment displays are big enough to see from a distance but not so big that you'd have trouble finding an enclosure for them.
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US$4.62
These common-cathode displays feature 4 x 7-segment digits and one decimal point per digit.
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US$1.39
These 5mm LEDs are of the "fast-changing" variety, meaning they fade-cycle very quickly through several colors and then flash-cycle through several more colors before starting all over again.
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US$1.95
These 10mm LEDs are of the "slow-changing" variety, meaning they cycle at a rate of one color every few seconds.
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US$1.95
These 10mm LEDs are of the "fast-changing" variety, meaning they fade-cycle very quickly through several colors and then flash-cycle through several more colors before starting all over again.
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US$0.97
These 3mm LEDs are of the "slow-changing" variety, meaning they cycle at a rate of one color every few seconds.
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US$0.97
These 3mm LEDs are of the "fast-changing" variety, meaning they fade-cycle very quickly through several colors and then flash-cycle through several more colors before starting all over again.
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US$0.69

This is a general purpose photodarlington optocoupler output in a 6 pin dip package.

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US$4.19

These Trigger Transformers are excellent for Xenon Strobe Tubes. 

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US$6.45
Wire Lead Length: 1.57". Glass Tube Height: 1.26". Glass Tube Diameter: 0.236". Flash Tube material: hard glass. Type of gas: Xenon. Anode to cathode voltage: 250V minimum. 300V nominal. 400V maximum. Trigger Voltage: 6KV minimum. Rated Average Nominal Life: (6,000 flashes). Flash Tube life is based on controlled conditions at nominal voltage. 
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US$6.45

Wire Lead Length: 1.57". Glass Tube Height: 1.26". Glass Tube Diameter: 0.236". Flash Tube material: hard glass. Type of gas: Xenon. Anode to cathode voltage: 250V minimum. 300V nominal. 400V maximum. Trigger Voltage: 4KV minimum. Rated Average Nominal Life: (9000000 flashes). Flash Tube life is based on controlled conditions at nominal voltage.

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US$11.19

Wire Lead Length: 1.97". Glass Tube Height: 1.77". Glass Tube Diameter: 0.31". Flash Tube material: hard glass. Type of gas: Xenon. Anode to cathode voltage: 250V minimum. 300V nominal. 400V maximum. Trigger Voltage: 6KV minimum. Rated Average Nominal Life: (8,000 flashes). Flash Tube life is based on controlled conditions at nominal voltage.

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US$10.42

Includes encapsulated laser diodes that are Class IIIa 5mW, with a 650nm red wavelength. They can be driven from 2.8V to 5.2V so they're great for your embedded electronics project.

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US$15.67

Includes encapsulated laser diodes that are Class IIIa 5mW, with a 650nm red wavelength. They can be driven from 2.8V to 5.2V so they're great for your embedded electronics project.

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US$15.05
It has a basic 16 character by 2 line display with a yellow background with black characters.
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