[ELECTRON] Arduino for beginners - Re: new member Brian

[Roy Mohan Shearer]

I'd be very interested in learning some more about Arduinos too btw.
Roy Mohan Shearer
(post-)Industrial Designer

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2009/6/23 Brian Hewitt <brianhewitt1 at gmail.com>:
> Thanks. I have seen something like that in other tutorials, although the way
> it was referred to was different. That definitely makes sense.
>
> One other question: in the arduino sketches, when you're using #include to
> call library scripts (like the LCD files, for example), do you have to set
> the path to library files or is that set up as a default path somewhere in
> the development environment already?
>
> Brian
>
> On 23 Jun 2009, at 22:05 | 23 Jun 2009, Ross Feilen wrote:
>
>> Hi Brian,
>>
>> From memory Vo is the contrast voltage which can be anything between 0 and
>> 5v.  Usual way of connecting this is to have a 10k or thereabouts pot
>> which
>> lets you vary the voltage between 5v and ground. There is an example
>> wiring
>> diagram on the datasheets for RS product
>>
>> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct
>> &R=2143244
>>
>> If you don't supply the correct voltage to this pin by using the pot
>> trimmer
>> then either the contrast will be too light (nothing displayed) or you'll
>> see
>> 'blocks' as the contrast will be too dark. You've probably seen this
>> before
>> in things like personal organisers, graphic calculators etc.
>>
>>
>> Ross
>>
>>
>>
>> On 23/6/09 20:34, "Brian Hewitt" <brianhewitt1 at gmail.com> wrote:
>>>
>>> I've done the basic blinking and fading light things on the arduino and
>>> now
>>> I'm trying to control a 16x1 LCD display. I've seen some tutorials on the
>>> web,
>>> and I know that there's an LCD script library that comes with the
>>> development
>>> environment. I have the example (usual "hello world") script and hooked
>>> it up
>>> with all the pins connected correctly, but it's not working (well, the
>>> back
>>> light comes on, but that's it...).
>>>
>>> I'm stumped about one of the pins on the LCD I have, which is not
>>> mentioned in
>>> any of the tutorials - the spec sheet calls it Vo: the supply voltage for
>>> driving the LCD (separate from the +5v supply voltage for the logic). The
>>> specs say it takes a variable voltage, but +1v typical. Anyone know
>>> anything
>>> about how or if that should be connected?
>>>
>>> Cheers!
>>>
>>> Brian
>>
>>
>>
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