[Diy_efi] Triac versus Relay - Knowledge please!

[greg gravener]

You can also reverse bias a diode across the coil of
the relay and lower the voltage spike to > .7 VDC, of
course this depends on the diode as well.  

You might look at some of the newer MOSFET's they have
a low internal "R" and will carry a pretty good load
if heat sinked correctly.
--- bcroe at juno.com wrote:
> A Triac or SCR, once fired, will never turn off till
> power 
> is removed from the circuit.  They are not very
> useful 
> for DC applications. 
> 
> The contact of a relay will not in itself generate a
> voltage 
> spike.  The coil will do some, but most things
> (including 
> DIY-WB) are equipped to handle much worse (like your
> 
> starter).  
> 
> Bruce Roe
> 
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