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Rgb led multiplexing

$15-25 USD / hour

Anulat
Data postării: peste 9 ani în urmă

$15-25 USD / hour

I am building my own 7 segments rgb display Each segments contain 1 rgb led common anode So the microcontroller sends the output to turn each color of each led But with this I am using 21 pins of the microcontroller since there are 7 segments and need 3 pins per color of segment I am using uln2803 since the rgb led is 12v So I need you give me a purpose of wich compoenents use to reduce the BoM because at moment I am using 1 microcontroller and 3 uln2803 per display, and I am building a clock so need 4 segments we cant multiplex because that reduce the led brighting I am paying only 10 usd, no more because I just need an answer and not the diagram nor code
ID-ul proiectului: 6581838

Despre proiect

9 propuneri
Proiect la distanță
Activ: 9 ani în urmă

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9 freelanceri plasează o ofertă medie de $19 USD/oră pentru proiect
Avatarul utilizatorului
Hi, Alternate option to ULN2803 would be to use individual transistors. But overall the cost may be more considering the assembly cost etc. What is the current for LED? And why are you using 12V? Isn't that a quite large (and may be a lot of power waste) for LED? Regards Vinod
$16 USD în 1 zi
5,0 (5 recenzii)
5,8
5,8
Avatarul utilizatorului
Hi, Have a Nice day. I can help you. it will be great if you upload the block diagram or schematics. There are many ways to cut down the price, reduce components count and to reduce PCB size as well. for further details Please feel free to contact. Best Regards, Shahbaz.
$22 USD în 5 zile
4,8 (16 recenzii)
4,8
4,8
Avatarul utilizatorului
Hi there. My name is Keith Becker and I am a professional electrical engineer here in the US. I graduated Vanderbilt University with a BS in mechanical engineering. I now work solely as a contracting designer and freelancer. I am knowledgable in all sorts of microcontroller implementations, circuit design, sensors, mechanical systems, wireless, PCB design and manufacturing, and more. I am hardworking and understand that when all is said and done, my clients need a product that works well and done direct to their specifications. I invite you to have a look at my profile resume and portfolio. Thank you for your consideration! - Keith B
$22 USD în 20 zile
5,0 (2 recenzii)
4,4
4,4
Avatarul utilizatorului
hi, I have the solution contact me through private messaging. I am an electronic engineer. In my way I can reduce one segment pin count to 9 or less. (which i will tell u in the PM)
$22 USD în 3 zile
5,0 (1 recenzie)
1,1
1,1
Avatarul utilizatorului
I have answer of your question, I worked on microcontrollers 7 segment display and uln 2803 I troubleshoot the electronics circuit also. I can help you if you give me a chance. Thanks
$15 USD în 3 zile
0,0 (0 recenzii)
0,0
0,0
Avatarul utilizatorului
Electrical Engineer doing my masters research in the domain of Microwave and RF wireless sensors for ARAMCO Saudi Arabia. Having more than 2 years in embedded systems in companies like Mentor Graphics, MicroTech Ltd. Also I have firm knowledge of control systems with control on PID controllers, digital design (sequential and combinational circuit designs), digital electronics (switching circuitry for power supplies). Besides project, I offer you free 5 days support even after completion of the project. Contact me for more details
$15 USD în 10 zile
0,0 (0 recenzii)
0,0
0,0
Avatarul utilizatorului
Hi, I am Microcontroller Engineer, Thinker ,Hobbyist. Like to work on Challenging Job like. So I am waiting to work with you. I have some more clarification on this,
$22 USD în 3 zile
0,0 (0 recenzii)
0,0
0,0

Despre client

Steagul MEXICO
Mexico
4,7
32
Metoda de plată a fost confirmată
Membru din sept. 17, 2013

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A apărut o eroare la trimiterea e-mailului. Încearcă din nou.
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