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

[Brian Hewitt]

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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