Large LED Segment Display
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Uploaded by jakedeeboy on Nov 14, 2009
I've had a pair of 4" 7-segment displays hanging around for 7 years for a project that never happened. Now that I've started dabbling with electronics again I thought I connect one up. Looks pretty impressive I think.
This is a common cathode display and each segment has a forward voltage drop of 8.8V so have used a 12V supply to a UDN2981 Darlington array source driver. The driver in turn is controlled by an Arduino microcontroller.
Uploader Comments (jakedeeboy)
All Comments (19)
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add a relay for the clicking sound
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If I had some of them (2) i will make an house number! for nights only!
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FRANKENDISPLAY
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hey man.. do u have ur schematic diagram of your project.. i'm interestes on how you drive a large seven segment or how to use the darlingtton array
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hey man.. do u have ur schematic diagram of your project.. i'm interestes on how you drive a large seven segment or how to use the darlingtton array
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@sergejk Rapid have red and super bight red. Search of order codes 57-0450 and 57-0460.
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yes where we can buy some of these in blue maybe
i want them for my segment arduino clock
herctrap 1 year ago
@herctrap see my reply to @sergejk below.
jakedeeboy 1 year ago
@jakedeeboy
check my video reply
herctrap 1 year ago
@herctrap That's good. Where did you find the blue displays?
I see you went with shift registers. I thought about that but decided to take a different approach. Mine is still at the prototype stage on a breadboard but I am using an Arduino to drive a MAX7219 which in drives 6 digits through Darlington arrays. I hope to finish it over the holiday.
jakedeeboy 1 year ago