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| Sequential tail lights |
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| robjodicarter:
I will be using a Toshiba laptop top Windows XP, I know it's old but it's my garage computer. And what should I get to power the boards on the bench? Sent from my PH-1 using Tapatalk |
| Mr. Scram:
--- Quote from: robjodicarter on October 01, 2018, 06:01:52 pm ---I will be using a Toshiba laptop top Windows XP, I know it's old but it's my garage computer. And what should I get to power the boards on the bench? Sent from my PH-1 using Tapatalk --- End quote --- A proper power supply is definitely a good tool to have, but any old wall wart should do. |
| robjodicarter:
So any 5 volt how many amp? I'll look it up. I'm a big boy. I should be getting all this stuff soon. I will let you know when I get it all. I'll be asking tons of questions I imagine. Rob Sent from my PH-1 using Tapatalk |
| Brumby:
For the very first projects, the Arduino board can run off the 5V it gets from USB. With this, you will be able to learn how to use the Arduino and get some low power projects running. I would suggest that once you have run through a few tutorials, you try getting the Arduino to do the original sequential tail light effect you wanted - just using low power LEDs on the breadboard. This would not be producing bright LEDs that you could use on a vehicle - it would just be a programming exercise in getting the LEDs to do what you want. The specifications for your 32x8 LED panels put them at just under 20W (at full brightness) each - which at 5V means 4A. The modules I mentioned can do up to 5A, so they should be able to handle 4A quite comfortably. However, this is waaaaaaayyyyyyyy more than you can get out of USB, so you will need a separate supply. For experimentation and bench testing, the normal recommendation is to get a lab-style bench supply that can deliver the volts and amps you will need. There are a lot of options here, but it will require you to fork out a few dollars. The up side is that such an acquisition will be an investment in the future and is the equivalent of getting yourself a decent set of combination spanners instead of trying get by with a couple of shifters. For your needs, a dual output 0-20V 5A adjustable power supply would be my suggestion - but you might also find 0-30V 5A units at a competitive price. Some of these have a third output, fixed at 5V at an amp or more, which can be useful. Here is one example On eBay (used) and another On Amazon (new) These are just the first units I found on eBay and Amazon - but this type of unit is available in many flavours. Plug packs are another option - but for two lots of 4A, I think you might be challenged to find suitable ones. However, for your situation and looking at the 32x8 panels, a simple 12V car battery sitting on your workbench would do nicely. Connect the buck power modules to the battery and the LED panels to the buck modules. The Arduino can be powered from the USB while being developed, but can then be powered from the battery using the DC barrel jack connection. |
| Mr. Scram:
--- Quote from: robjodicarter on October 02, 2018, 03:16:06 am ---So any 5 volt how many amp? I'll look it up. I'm a big boy. I should be getting all this stuff soon. I will let you know when I get it all. I'll be asking tons of questions I imagine. Rob Sent from my PH-1 using Tapatalk --- End quote --- 5V might be too little for the Arduino. This is because it has its own regulator on board which will eat up a bit of the 5V you supply it. You may want to look up what voltage regulator drop out voltage is. |
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