All Questions
Tagged with transistor-array led
6 questions
3
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How do pixels in a LCD display are individually controlled by a electrode?
How do tiny subpixels in the Led displays are controlled by those indium tin oxide electrode.How do they provide different voltage for each pixel
2
votes
1
answer
321
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led chaser with non-mechanical shut-off option
I've seen thousands of standard led chaser circuits online but I haven't seen one in which I can shut off all LED's in a non-mechanical way.
I'm wiring one pin of my chaser up to a microcontroller so ...
0
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1
answer
304
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Array switch circuit design
I am attempting to design an "array switch" where a user can toggle a switch and a different array of LED's are turned on based on multiple reference traces. The picture is my best attempt so far. I ...
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4
votes
2
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How to efficiently power and arrange 100 multi chip LEDs in 6 different colors each color runnig off their own transistors
First time on here hope I have given sufficient information. I am trying to power 100x 5W high power multi chip LEDs and 8x 3W high power LEDs. I would like to do so off of 120v Ac house plug. The ...
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Can I somehow use one PWM output to set various LEDs to different brightness?
I would like to build a project in which 15 groups of LEDs are set to a brightness level. I have an Arduino with digital PWM outputs (which can mimic a range of voltages.) How can I do this?
One ...
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2
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1
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Questions about a simple LED circuit using the ULN2003A
I'm a newbie, and am trying to drive several independent LEDs using a transistor array in a 5-volt CMOS circuit. Here's what I've come up with, showing only the first LED:
In the schematic, ...
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