[dorkbotpdx-blabber] Re: [dorkbotpdx-announce] Motors and servos and relays oh my! (Workshop, Sunday 24aug08)

[Michael Bunsen]

I soldered my H-bridge controller today and got an early instrument rolling:
http://flickr.com/photos/itsaoof/2801689401/

I tried to post a video but vimeo kept crashing my browser. In the mean
time, the photo shows one motor hooked up with an attached stem from a dried
gourd that is whacking a broken gong. The motor is tilted so gravity brings
the arm/stem back down and whacks the metal bowl. There is a small
potentiometer on the arduino that controls the delay between whacks.

For some reason only the output port for M1 works, but that may be due to my
shabby soldering. I am doing my best to look at the original PCB schematic
and make sure all the connections are good.

To reverse direction is it suppose to be a matter of just changing
digitalWrite(motor1dir, HIGH) to digitalWrite(motor1dir, LOW)? changing that
stops my motor all together.

Lastly, when I try using a 9V .66A power supply for the external power the
chip on the H-bridge gets pretty hot after a few minutes. Is that way too
much i? How can we safely get more strength out of the motor?

Thanks for all your help Don & Adian!

Michael

On Tue, Aug 26, 2008 at 3:48 PM, dan p <gunterhausfrau at gmail.com> wrote:

> True enough. Thanks Don for putting this (and the other classes) on. I
> enjoy them quite a bit. After the first one (introduction to the arduino) I
> put together the control for my greenhouse that I had been thinking about
> for a couple of years, but didn't have the critical mass of stuff, knollege,
> and momentum. I've got a few other "back of the mind" projects that will get
> moved forward...
>
> Thanks Don.
> Dan.
>
> and thanks to Eric for putting together the orders!
>
> On 8/26/08, Brian Richardson <skinny at knowhere.net> wrote:
>>
>> Just wanted to give Don some public "props" for putting on the workshop!
>> I learned a bunch and it was fun.  I've got a little web cam hooked up to
>> the servo that I can move around from the Arduino IDE.
>>
>> On Sun, Aug 24, 2008 at 1:11 PM, dan p <gunterhausfrau at gmail.com> wrote:
>>
>>> are you at PNCA now? the room appears to be locked due to painting.
>>> Wondering if your in another room?
>>>
>>> Dan
>>>
>>>
>>> On Thu, Aug 21, 2008 at 6:56 PM, Donald Delmar Davis <
>>> ddelmardavis at gmail.com> wrote:
>>>
>>>> Brian,
>>>>
>>>> ------ snip ------
>>>> Sunday building hour are 1-6pm
>>>>
>>>> Date :  8/24/08   Requested by: Dorkbot Crew Paige Saez
>>>> Room : 205
>>>> Time : 1:00pm  - 5:00pm     # of people:     Day: U
>>>> ------ pins -------
>>>>
>>>> Thanks for the reminder.
>>>>
>>>> The workshop will run from 1 to 5 and there is a lot of material to
>>>> cover.
>>>> I will have a short write-up  of things to bring out to the list in the
>>>> morning.
>>>>
>>>> Don (aka feurig).
>>>>
>>>>
>>>> On Aug 21, 2008, at 6:50 PM, Brian King wrote:
>>>>
>>>>
>>>>> Don, what time will the workshop be?
>>>>>
>>>>> Thanks,
>>>>> Brian
>>>>>
>>>>> Now that I know at least 50 people who have working arduino's around
>>>>>> here somewhere I thought we should get some things moving (literally).
>>>>>>
>>>>>> A week from sunday I am going to do a workshop covering driving
>>>>>> motors, servos and relays with the arduino/wiring platform.
>>>>>> I will be covering the a couple of popular chips: The l293D for
>>>>>> driving motors , and the ULN2803 darlington array for driving relays,
>>>>>> stepper motors and other devices.
>>>>>> The workshop will cost $25 and will include these chips, least one
>>>>>> motor, a relay, a small servo and a board (tbd).
>>>>>>
>>>>>> The idea is to get as much hands on and working as possible so please
>>>>>> bring your arduino,freeduino,or dorkboard, a soldering iron, your laptop and
>>>>>> we will get our hands dirty.
>>>>>> I am limited to 20 on this one so please RSVP if you can.
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
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>>>
>>>
>>>
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