Electronics > PCB/EDA/CAD

How can i improve on my design?

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Grayfox:
I am making a LED brake light for my car, i added the components, but would like to know if i can improve it any further

c4757p:
With 12V and all those LEDs in parallel, you're wasting more power in the resistors than you're using in the LEDs! Put them in series groups of 3 or 4 (depending on the voltage drop of the LED, it needs to add up to less than 12V and still give a bit of room for a resistor), each group having one single resistor, and put the groups in parallel.

Like in the attached schematic:

c4757p:
Also, upload the board in a more friendly format. Not everybody wants to mess around with your Gerbers or has KiCad installed. Export to PDF.

David_AVD:

--- Quote from: c4757p on July 17, 2013, 03:09:24 pm ---Also, upload the board in a more friendly format. Not everybody wants to mess around with your Gerbers or has KiCad installed. Export to PDF.

--- End quote ---

+1 to that.  Uploading a schematic or layout as anything other than an image or pdf will get your files ignored big time.

digsys:

--- Quote from: David_AVD ---+1 to that.  Uploading a schematic or layout as anything other than an image or pdf will get your files ignored big time.   
--- End quote ---
+1 and besides, ZIP files are the devils advocate !! Never open a zip file from people you don't know. Not even with protection.
I'd add to C47#s suggestion - Assume 1.2V drop, put 8 in series = 9.6V. Use an LM317L as a constant current limiter, to say 20mA.
That adds 1.2V = 10.8V, which ends up giving you fixed brightness from a flat battery to fully charged.
With higher OP Leds, just redo the calcs for a minimum 11.0V cutoff. If your battery gets lower than that, you have other problems.

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