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Messages - jwiderberg

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Questions / Re: COnnecting an analog servo to Makey Makey
« on: April 23, 2015, 10:04:10 AM »
Thanks! Adding the motor is a really simple build that adds an interesting degree of interactivity. Did a robot building workshop with 30 kids (and their parents) with this setup (the drinkingstraw connectors are from Strawbees.com)


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Questions / Re: COnnecting an analog servo to Makey Makey
« on: April 16, 2015, 08:11:44 PM »
In the end I just got a 50RPM DC brushed motor for a few dollars. Works perfectly!

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Questions / Re: COnnecting an analog servo to Makey Makey
« on: April 15, 2015, 10:16:05 PM »
Having read up further, I now understand this:

"Most servos can only rotate from 0° to 120° although it is becoming more common to get servos that can rotate a full 180°. You can also get a continuous rotation servo. A continuous rotation servo can rotate continuously in either direction. The control signal determines speed and direction instead of position.

Servos have 3 wires, a signal wire which is usually white, yellow or orange. A red wire in the middle which is positive (+V) and a black or brown wire which is your ground (-V).

To control a servo we generate a positive pulse on the signal wire which is repeated typically every 20mS. The position of the servo is determined by the width of the pulse. Normally the center position is acheived with a pulse width of 1.5mS. Fortunately most micro controllers have a servo library that does this for you in the software."

I guess each signal triggered from D14 is having the same pulse width? Therefore the servo will not continuously move but assume it's in the correct position? Would I need to add a servo library in order to control it they way I want?

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Questions / Re: COnnecting an analog servo to Makey Makey
« on: April 15, 2015, 09:07:31 PM »
One step closer

I realised I had made some modifications to the firmware (using http://www.makeymakey.com/forums/index.php?topic=5610.msg17283#msg17283) which had nulled the D14 output. I returned the MM to stock and now it does work ALMOST as aspected :)

The challenge now is that each keypress event only triggers one "degree" movement on the servo. Repeatedly triggering will make it move ever so slowly (clockwise). I wonder what I can do to make it move continuously when D14 is triggered?

Thanks!

Jakob
 



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Questions / COnnecting an analog servo to Makey Makey
« on: April 15, 2015, 08:33:24 PM »
Hi there,

I'm trying to work out if I can hook up an analog servo (http://www.seeedstudio.com/depot/Grove-Servo-p-1241.html) to the Makey Makey. As far as I can work out, I get an initial "ping" from the servo once the GND and 5V pins are connected. But in terms of SIG, I've tried D14, D16 and D15 and there is no further servo movement - I would've hoped that the output triggered by the MM would trigger the servo. Bit of an Arduino newbie. I've attached a photo that hopefully gives more detail as to the configuration.

Thanks!

Jakob



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How-To Contest / Re: Makey Makeys Far Away
« on: October 08, 2014, 08:31:19 AM »
We've had a lot of fun with it! Excellent tutorial, thanks so much for sharing! One additional note - the serial id (set to 0 in the Processing sketch you refer to) turned out to be 5 for all the different Macs we used. This can cause a bit of confusion for those unfamiliar with Processing as no signal will be sent to the Makey Makey (but you won't get an error).

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How-To Contest / Re: Makey Makeys Far Away
« on: October 07, 2014, 10:09:38 AM »
Since Google Talk has been replaced by Hangouts, the original examples will no longer work. However, if you create accounts and use an existing Jabber service such as jabber.at this works just fine.

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