Search found 106 matches

by cef
Tue Sep 09, 2014 10:05 pm
Forum: Eleven
Topic: Can I source 6V+ from the 11 board?
Replies: 1
Views: 3174

Re: Can I source 6V+ from the 11 board?

If you're making this as a shield AND you're powering the Eleven from a voltage source (from the DC barrel jack) that would be fine for running the MAX3232 chip, then you will most likely find that you can tap this source off the VIN pin on the Eleven. Note: This will be unregulated by the Eleven. I...
by cef
Fri Jul 11, 2014 12:31 am
Forum: USBDroid
Topic: Will this work for my car?
Replies: 3
Views: 2783

Re: Will this work for my car?

Yes, plugging the Android device into the USB HOST port in the USBDroid is how the commands are communicated. As for Bluetooth, you could possibly do that by writing both the Android side and the Arduino side to do the communication. Note however it most likely won't be a simple job, and if you're n...
by cef
Mon Jul 07, 2014 10:16 pm
Forum: USBDroid
Topic: Will this work for my car?
Replies: 3
Views: 2783

Re: Will this work for my car?

You could use the USBDroid if you're happy connecting to it via a USB cable. I haven't seen it work using Bluetooth myself (someone else may know). As long as you've got a fairly recent version of Android on it, it should work. You would either need to write your own code on the phone, or use one of...
by cef
Sun Jun 08, 2014 7:55 am
Forum: Random Chit-Chat
Topic: Newbie to Electronics
Replies: 2
Views: 1188

Re: Newbie to Electronics

There's the Sydney Hackerspace, aka Robots & Dinosaurs, which might be a good place to start.

They're right opposite Meadowbank station: http://robodino.org/
by cef
Tue May 06, 2014 11:48 pm
Forum: HBRIDGE: H-Bridge Motor Driver Shield
Topic: HELP with H Bridge (DC Motors)
Replies: 3
Views: 2435

Re: HELP with H Bridge (DC Motors)

Hello You need to use motors that are between 8 and 40V DC. http://www.freetronics.com/pages/hbridge-motor-driver-shield-quickstart-guide John To clarify that: You can use lower rated motors than 8V, however you need to modulate the enable line. What you also need is to give the H-Bridge board more...
by cef
Tue Apr 29, 2014 1:38 am
Forum: EtherMega
Topic: 3D printer "smarts"
Replies: 6
Views: 2251

Re: 3D printer "smarts"

I would either use an extra set of stacking headers to raise the board up, or use longer header pins on the RAMPS. The Ethernet connector is taller than a USB is on a standard Mega (about 2-3mm taller), so you can't simply put RAMPS on top and insulate it with some Kapton.The Ethernet jack sits high...
by cef
Mon Apr 28, 2014 2:52 am
Forum: EtherMega
Topic: 3D printer "smarts"
Replies: 6
Views: 2251

Re: 3D printer "smarts"

There's a few issues here. 1. RAMPS and Ethernet connector: Ramps itself is so very close to colliding with the Arduino Mega USB connector, and a bad soldering job on a RAMPS board can lead to shorts. The Ethernet connector on the EtherMega is larger, so you'd need to either replace all the headers ...
by cef
Mon Apr 21, 2014 8:15 am
Forum: Module Support
Topic: Can the Mosfet module be setup to pass negative current?
Replies: 2
Views: 2074

Re: Can the Mosfet module be setup to pass negative current?

You really need to use a different type of mosfet to switch a positive voltage, and you really need a proper driver circuit to do it too. The NDrive uses an N-type Mosfet, but you really want a P-type. The only issue is that you need to switch the gate from the full voltage of your supply (12V) down...
by cef
Tue Apr 08, 2014 12:12 am
Forum: Random Chit-Chat
Topic: Arduino IDE Java Errors
Replies: 5
Views: 2871

Re: Arduino IDE Java Errors

Well the way the Arduino IDE is written, I think it uses more memory the more extras you add to it.

So the more boards in boards.txt, the more libraries, etc, the more memory it uses.
by cef
Fri Apr 04, 2014 11:01 pm
Forum: Random Chit-Chat
Topic: Arduino IDE Java Errors
Replies: 5
Views: 2871

Re: Arduino IDE Java Errors

It's a limitation in Java that it's that small. Doesn't have anything to do with Windows specifically. You can change it in Windows via the Java control panel. Look at something like this for how: http://www.auditmypc.com/java-memory-xmx512.asp BTW: The max Java can allocate for 32 bit Windows is ab...