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Topic: Can Arduino fulfil my needs? (Read 2 times) previous topic - next topic

eaycrcr

ok thanks all.

I will continue to work through the tutorials.

When I actually start to put this stuff together you can expect to hear a lot from me...

I shall get stuck in, will post significant changes back here.

eaycrcr

was just wondering what sort of power supply you guys use? I know the wall plug for the arduino can give a bit of juice but obviously I'm going to need something with a bit more kick for a 12V DC Motor that can swallow around 15A.

How would you guys power up something like that?

retrolefty

#12
Dec 21, 2010, 11:53 pm Last Edit: Dec 21, 2010, 11:54 pm by retrolefty Reason: 1
Quote
I know the wall plug for the arduino can give a bit of juice but obviously I'm going to need something with a bit more kick for a 12V DC Motor that can swallow around 15A.


If on a budget a popular route is to use a suitable PC power supply modded for standalone operation. However there are good buys to be found on E-bay and surplus electronics on-line stores for such power supplies. At that current level a switching power supply makes a lot more sense then the old linear power supplies.

http://www.allelectronics.com/make-a-store/item/PS-1512/12-V-12A-FAN-COOLED-POWER-SUPPLY/1.html

http://cgi.ebay.com/DC-12V-15A-Universal-Regulated-Switching-Power-Supply-/220707275454?pt=LH_DefaultDomain_0&hash=item33632dc2be

http://cgi.ebay.com/12V-15A-DC-Universal-Regulated-Switching-Power-Supply-/270666259596?pt=LH_DefaultDomain_0&hash=item3f04f75c8c

eaycrcr

ah so that's why you're a God Member! Thanks very much mate!

why is is that the further I go into this electronics business I wish that I lived in the states?

Unfortunately I'm English, and with it comes all that overpriced crap!

Any UK / EU suggestions?

Although now I do know what I'm looking for! Thanks very much!

eaycrcr

So my exams are over and its back to the project. I've got a few questions about physically wiring the stuff up:

1. Pull ups and downs. I get the idea but how do you know how big a resistor you should use?

2. Any general advice for wiring and terminal standards? I'm looking at using an LCD along with all the other bits and it feels like I'm going to be using every pin on the MEGA. How do you avoid getting lost? Is there some generic break-out that allows the use of screw terminals ontop of the standard Arduino headers? What's the wiring convention that Arduinos use on their pins?

3. Any recommended maximum lengths before TTL voltages get lost?

4. I found Arduino through RepRap where they talk about Molex connectors, is this a good standard to adopt?

Thanks for your help :D

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