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RASPBERRY PI and best way to power push button LED

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PL1:

--- Quote from: corrupt27 on December 20, 2014, 09:39:07 am ---I have no idea where i can draw the power from. Can i get it from the raspberry PI? Or maybe the usb hub.

--- End quote ---
I'm not familiar with the power equirements or specs on the RasPi.

Hopefully, someone who has hands-on experience with them can chime in on using the input power or 5v from an output pin.

If the USB hub is powered, you can run any of those buttons with a simple USB power tap cable. (easy to make from an old cable or buy a pre-fab one here from GGG)



If the hub is unpowered, the USB spec calls for a maximum 100 mA current draw -- that's why I added R2 in the diagram above.


Scott

Jakobud:
You can power LEDs from any power source, doesn't have to be the Pi.

dn:
Raspberry Pi's aren't intended to provide much power. I'd just get a 5v or 12v wall plug, cut the end off and connect the LED's accordingly. For 5v, an old USB style cell phone charger can work as a power supply.

mcseforsale:
Check out the blue pill control panel.  Specifically how I power my EI2 buttons on blue only.

http://forum.arcadecontrols.com/index.php/topic,117977.msg1266787.html#msg1266787

I'm powering a 6 post terminal block with 4 of the posts jumped together as (-) and the other as (+) and then a hacked USB cable to the PC powering the thing.  If you need 12v, you can hack a walwart to the same kit like I did on the speaker panel to power the amp and lights.

Here's the power block for my EI2 buttons.  The hacked cable plugs into a USB hub just outside the CP box:



Here's the block on top of the speaker panel that provides 12v with a hacked 12v 1MA walwart that powers the marquee CCFLs and the amp for the speakers:


AJ

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