Re: Re: [OTish] Electronics (for HA)

[Ant Skelton <ant@xxxxxxx>]

andy_powell_is wrote:


> +ve --- 220 Ohm Resistor---LED --- +ve 
> 
> which is the sort of layout I was doing with things from the book...
> as you have probably already guessed the LED does not light.. :(


I take it the two positives above are a typo? Otherwise there's yer 
problem right there - the right hand +ve should be a -ve. The cathode on
the LED (shorted led, flat filed on the case, whatever) connects to the
-ve side.


ant
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