Sequencers

S

steamer

Guest
--Have been googling around to find the little inverter/sequencers
for blinking various strings of electroluminescent wire for an artsy-fartsy
project. What I can't find are robust ones capable of running more than
short lengths of the stuff. What I'm looking for is a 12-v driver that can
sequence 3 channels, each of maybe 30ft of EL wire. Any pointers
appreciated.

--
"Steamboat Ed" Haas : "Hold on! we're passing
Hacking the Trailing Edge! : through the moronosphere!"
www.nmpproducts.com
---Decks a-wash in a sea of words---
 
steamer wrote:
--Have been googling around to find the little inverter/sequencers
for blinking various strings of electroluminescent wire for an artsy-fartsy
project. What I can't find are robust ones capable of running more than
short lengths of the stuff. What I'm looking for is a 12-v driver that can
sequence 3 channels, each of maybe 30ft of EL wire. Any pointers
appreciated.

Project time!
Click to expand...

How about a sequencer that can handle LEDs, some hefty transistor
switches, and some plain old EL drivers?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
 
On 27 Jun 2008 16:21:15 GMT, steamer <steamer@sonic.net> wrote:

--Have been googling around to find the little inverter/sequencers
for blinking various strings of electroluminescent wire for an artsy-fartsy
project. What I can't find are robust ones capable of running more than
short lengths of the stuff. What I'm looking for is a 12-v driver that can
sequence 3 channels, each of maybe 30ft of EL wire. Any pointers
appreciated.
Click to expand...

Ed,

If you've found a cheap, light-duty controller that meets your
timing and sequencing needs, consider having it drive relays instead
of EL strings. Then drive your EL strings from the relays.

That would be much quicker (and probably cheaper) than rolling your
own from scratch.

Good luck!

Tom
 
Tom2000 <abuse@giganews.net> wrote:
If you've found a cheap, light-duty controller that meets your
timing and sequencing needs, consider having it drive relays instead
of EL strings. Then drive your EL strings from the relays.
Click to expand...
--Hey I like that! Thanks for the idea!


--
"Steamboat Ed" Haas : "Hold on! we're passing
Hacking the Trailing Edge! : through the moronosphere!"
www.nmpproducts.com
---Decks a-wash in a sea of words---
 
--Oops followup question: the sequencer output is around 400hz AC;
will this cause any problems with a relay?

--
"Steamboat Ed" Haas : "Hold on! we're passing
Hacking the Trailing Edge! : through the moronosphere!"
www.nmpproducts.com
---Decks a-wash in a sea of words---
 
steamer wrote:
--Oops followup question: the sequencer output is around 400hz AC;
will this cause any problems with a relay?

Probably, unless it's specially designed for 400Hz; if there were such a
Click to expand...
beast it would be a specialized aircraft relay from the 60's or 70's.

You could rectify the AC with a little bridge and use that to feed the
relay -- it should work well. Just what you need for a rectifier and
associated circuitry depends on whether the relay you use is mechanical
or not. For a mechanical relay there's a good chance that you could
just use a bridge and count on the relay coil's inductance to smooth the
current out sufficiently; for a solid-state relay you'd probably need a
bridge, filter capacitor and loading resistance.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
 
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