S
Steve
Guest
For my MAME cabinet I want to be able to switch 4 LEDs on or off via the PC
(parallel port, I'm thinking.)
Now, I realise that my superbright white LEDs (130mW, 3.5V) cannot be run
from the parallel port directly, as the port won't supply enough power, so
I'll need to use the port to control relays or something that will switch
the required LEDs on or off (that are powered directly from the PC PSU.)
Now, I can use a soldering iron but I'm pretty much an electronics newbie.
Does anyone know where I might find a circuit to build that will do all
this, or else a premade kit I can purchase (Jaycar?)
My ability is around the level of soldering wires and using a multimeter, so
the simpler the design the better. I'd like to ensure I can't blow up my
parallel port, so feel free to point me to an opto-isolated design or
something.
My searching on the web also turned up this:
http://www.oceancontrols.com.au/controllers/parallel_relay_k074.htm
A parallel port relay board, which costs $54, and sounds like it may fit the
bill. Is this the kind of thing I'm looking for, or is it pricey and total
overkill? I doubt I'd need the circuit to be bi-directional for my own
requirements.
Thanks for any info.
-steve-
Brisbane.
(parallel port, I'm thinking.)
Now, I realise that my superbright white LEDs (130mW, 3.5V) cannot be run
from the parallel port directly, as the port won't supply enough power, so
I'll need to use the port to control relays or something that will switch
the required LEDs on or off (that are powered directly from the PC PSU.)
Now, I can use a soldering iron but I'm pretty much an electronics newbie.
Does anyone know where I might find a circuit to build that will do all
this, or else a premade kit I can purchase (Jaycar?)
My ability is around the level of soldering wires and using a multimeter, so
the simpler the design the better. I'd like to ensure I can't blow up my
parallel port, so feel free to point me to an opto-isolated design or
something.
My searching on the web also turned up this:
http://www.oceancontrols.com.au/controllers/parallel_relay_k074.htm
A parallel port relay board, which costs $54, and sounds like it may fit the
bill. Is this the kind of thing I'm looking for, or is it pricey and total
overkill? I doubt I'd need the circuit to be bi-directional for my own
requirements.
Thanks for any info.
-steve-
Brisbane.