7 Segment Display - 3 Inches - Red
  • 7 Segment Display - 3 Inches - Red

7 Segment Display - 3 Inches - Red

SKU 104990052
Find segments in digital displays an interesting material to create art work with? Then look no further than our seven-segment digital building blocks
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Description
Find segments in digital displays an interesting material to create art work with?    Then look no further than our seven-segment digital building blocks.  They allow you to design words, numbers, or unique patterns.  One unit of this product includes 3 horizontal segments and 4 vertical segments, enough to build the number “8” or whatever else you think of.  Order more if you want to make a larger pattern.
 
Features
  • Easy to assemble
  • RoHS compliant
  • ESD 2000 V
  • Free style display
 
Specification
  • Diameter : 11.5 mm
  • Power Dissipation Per Segment :45 mW
  • Reverse Voltage Per Segment:5 V
  • Forward Voltage Per Segment:7.2 V (I = 20 mA)
  • Continuous Forward Current Per Segment:25 mA
  • Peak Forward Current Per Segment:80 mA
  • Operating Temperature Range:-20 °C – 80 °C

 

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Questions and Answers
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The datasheet doesn't say in English, but it does in Chinese: the coloured pole is positive.
on May 15,2017
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Hello, it's in both Chinese and English.

Thanks. 

on May 16,2017 09:07 AM
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Hi,

Parts of the datasheet are in English, but I wasn't able to find any information about which pole is the anode and which is the cathode.

On page 4 of the decimal point's datasheet, there's a string of four diode symbols. Above the diodes, there's a Chinese-language phrase which roughly translates as"the coloured pole is positive."I wasn't able to find this information anywhere in the English-language text.

This is particularly problematic, because the datasheet states the maximum allowable reverse voltage is 5v, which is less than the forward voltage. This makes it impossible to test the polarity without violating the Absolute Maximum ratings. (I suspect the 5v reverse voltage must be per diode, or 20v for a string of four. However, the forward voltage is specified for the whole string, so it's really not clear.)

Thanks,

Dave Suffling

on May 16,2017 09:20 AM
Replyupvote ()

Hi Dave,

I see what you mean. 

There's"the coloured pole is positive"in Chinese. So don't worry about it, the pole with a red dot is positive.

Thanks. 

on May 16,2017 14:15 PM
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