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by MrHague
Wed Jul 30, 2014 8:06 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

These are the photos of my current set up. I am genuinely lost now. I can't see what is wrong. I can't even stop the motors running by using AllOff, Pin11Off, MotorAOff, Set MotorA to Stop etc. Strange the motors start running as soon as scratch enables external outputs etc as it starts. http://s26....
by MrHague
Wed Jul 30, 2014 7:31 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

I did that. For some reason they just start running when scratch opens, not even when I run a script.
Will post a few photos as I bet I'm wiring wrong or something.
by MrHague
Wed Jul 30, 2014 6:09 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

Wonderful help guys. Needed to use a breadboard to combine the grounds of the pi GPIO pin 3 with that from the L9110s.

Any idea why my motors run automatically when I open Scratch GPIO? Haven't even coded anything.

Would like to start with scratch you see.
by MrHague
Wed Jul 30, 2014 4:04 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

I have connected the positive and negative wires from each motor to the L9110S but am now stuck as to which of the pins on the L9110s I use to connect my 4 AA battery pack. I briefly connected the positive wire from my battery pack to the VCC pin and the negative to GND but felt it get warm quickly ...
by MrHague
Tue Jul 29, 2014 3:30 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

Ok, so my items have arrived and I've done a little building. My questions is another simple one: How do I wire the motor board up to a power supply? as I believe the main reason I got a seperate motor board is to not draw current from the pi itself. I have taken some photos of the kit I am currentl...
by MrHague
Sun Jul 27, 2014 8:30 am
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

Perfect. Thank you.
I realise we are going round in circles but it is going in slowly. I promise.
Ordering now.
Thank you very much.
by MrHague
Sat Jul 26, 2014 5:46 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

Thank you for your advice.
Would this be appropriate?
http://www.ebay.co.uk/itm/131072900928

Would it need it's own power supply?
by MrHague
Sat Jul 26, 2014 3:47 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

So... looking for simplicity, I have ordered a Magician Chassis kit. Do you guys think I will be able to run the two motors from Pibrella? Or would you advise against this. There is little documentation or reference online about the pibrella being used for this, but we did it at picademy for a short...
by MrHague
Fri Jul 25, 2014 3:16 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

The ULN2003 sounds good for connecting motors as suggested by simplesi.
How do I know which motors will be suitable for the rpi based on power and torque?
How will I know what boards can handle it?
by MrHague
Fri Jul 25, 2014 9:37 am
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

That guide does help. Thank you both for such quick replies. Would I be able to control this robot using scratch? That looks a realistic goal at the moment with my kids.
by MrHague
Thu Jul 24, 2014 6:46 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

I'll give your setup a go.
Would the motor board need its own power supply or would it run from the RPi?
Also, would I be able to get it to respond to scratch?

So many NOOB questions I know.
Need to learn to walk before I run...
by MrHague
Thu Jul 24, 2014 6:26 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Re: Simple robot for RPi

Would pibrella work as a motor board? That's what we used on picademy.
by MrHague
Thu Jul 24, 2014 5:58 pm
Forum: Picademy
Topic: Simple robot for RPi
Replies: 29
Views: 12518

Simple robot for RPi

I worked with another picademy attendee to wire a model b+ to an old robot kit we stripped out. We then controlled it with both scratch and python. I was so interested in it, even without any knowledge of electronics, that I want to take this further. I know the kids in my class would love to use sc...
by MrHague
Sat Jul 19, 2014 9:07 pm
Forum: Staffroom, classroom and projects
Topic: Laptop->Lan connection in Primary Classroom
Replies: 6
Views: 2509

Re: Laptop->Lan connection in Primary Classroom

That sounds great. What does cmdline.text look like with that on the end? Do I need to use a space before I add that in, or a new line? I realise I am a NOOB.
Thanks for the quick reply.
by MrHague
Sat Jul 19, 2014 8:36 pm
Forum: Staffroom, classroom and projects
Topic: Laptop->Lan connection in Primary Classroom
Replies: 6
Views: 2509

Setting up set of classroom RPi from scratch

Hi all, I want to take 10 RPi (to start with) fresh out of their box and be able to use them with my children. However, we don't have any monitors or keyboards etc. Rather than buy these things I was hoping we could use ethernet cables to link them to the school laptops we have, which run on Windows...
by MrHague
Thu Jul 17, 2014 6:39 pm
Forum: Picademy
Topic: Congratulate the latest Raspberry Pi Certified Educators!
Replies: 3
Views: 3204

Re: Congratulate the latest Raspberry Pi Certified Educators

The Model B+ was a fantastic surprise to receive on Monday. Picademy was awesome, can't believe how much I learnt and how much I didn't want to leave. Just ordered one of each of a variety of accessories I see being appropriate to start with my class and school, 6 week holidays are a great time to p...
by MrHague
Tue Apr 22, 2014 1:00 pm
Forum: Staffroom, classroom and projects
Topic: Why use a RPi at school?
Replies: 32
Views: 8406

Re: Why use a RPi at school?

Wow. Very quick replies and very insightful. I will have a look through the other threads. Thank you for the links.
I am very excited to use them in school but now just need some direction.
Thanks again :)
by MrHague
Tue Apr 22, 2014 12:02 pm
Forum: Staffroom, classroom and projects
Topic: Why use a RPi at school?
Replies: 32
Views: 8406

Why use a RPi at school?

Hi all, I am a primary school teacher and would love to offer some kind of club for the kids, perhaps involving using Raspberry Pis. I have one at home and generally just fumble around with it and magpie bits from here and there. I've had it run XBMC, Chameleon Pi and other stuff whilst at home. I w...

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