AVR-Chat

I am not familiar with solid state relays. Btw, which is 
more important: current or voltage? I mean, what are the 
requirements in order to close a relay? Enough voltage? or 
enough current? As far as i know, if i want to buy  a 
relay at my favorite store, they will ask: how many volts? 
My point is, is there enough voltage to turn on your 
relay? In your circuit, the relay gets less than 5 volts.

And does anyone know the resistance of a relay?

Thanks.
Irfan.

> --- kc9dag <dpboyer@dpicts.com> wrote:
> 
>> I have designed a circuit that works fine when I run
>> it on the 
>> STK500, but when I tried to move the circuit to its
>> own board (this 
>> is the first time I have done an avr w/o using the
>> STK500) it does 
>> not work.  I was wondering if someone would mind
>> looking at the 
>> schematic
>> (http://www.dpicts.com/Tiny15L-LaserDetector.jpg)
>> and 
>> telling me what I am doing wrong?  The circuit
>> basicly waits for a 
>> laser beam to be broken (detected by the photodiode)
>> and then 
>> activates a relay in a set time pattern.  When I try
>> the soldered 
>> circuit, the relay never activates regardless of the
>> laser (again it 
>> worked fine when it was hooked up to the stk500,
>> only using an led 
>> instead of the relay.)
>> Thanks,
>> Daniel
>> KC9DAG
> 
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