Re: Launcher relay question
- From: the notorious t-e-d <tdstr@xxxxxxxxxxxxxxx>
- Date: Tue, 17 Jan 2006 09:43:45 -0600
Gots the parts but haven't started the build yet. I'm starting a new job tomorrow(yay, no more contract 1099 crap) and been preping for that.
Hopefully this weekend I'll get it built.
Ted Novak TRA#5512 IEAS#75
Tater Schuld wrote:
so, you get it built?
our club has a couple of relay launchers, and they work well when the batterys work.
not sure why you couldnt find a SPDT relay. i couldnt find a SPST relay anywhere (but did not look hard)
"the notorious t-e-d" <tdstr@xxxxxxxxxxxxxxx> wrote in message news:11sovii69fndt9e@xxxxxxxxxxxxxxxxxxxxx
Bob Kaplow wrote:
In article <11smde4tpf1g215@xxxxxxxxxxxxxxxxxx>, the notorious t-e-d <tdstr@xxxxxxxxxxxxxxx> writes:
Ok, I'm just about to start the build on a 12v relay launcher and I'm running into trouble. In particular the relay unit. I've checked damn everywhere locally and have not been able to locate a suitable 12v SPDT relay. Found plenty of 12v SPST relay units but no SPDT units. I've checked several auto stores and surplus stores to no avail. I ended up buying a 12v 30 amp SPST relay at rat shack and I have no doubt it'll work just fine but I'd *really* like the feature of a continuity check.
I just took apart my old (late 80s?) relay box. It has such a relay. It's labeled Auto Spec TW-3415. But a web search doesn't find any references.
I did a search on "RELAY 12V 30A SPDT" and got a LOT of hits, including
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=330-070. I'd
start looking locally at car stereo shops, which is where I think mine came
from.
While my relay design uses a SPDT to drop the continuity check when I launch, I don't see why it wouldn't work with a SPST relay that just bypasses the piezo buzzer the same way the Questes launchers bypass the light bulb when you launch.
Well what do I know....I found the EXACT same relay at a local electronics surplus store that a local flyer clued me in on. Too bad I didn't pick that relay when I was there earlier today :(
Regardless, a beeg fat thanx to all who posted on this thread!
Wait a minute.... there's a rocketry related thread on rmr???
:)
Ted Novak
TRA#5512
IEAS#75
.
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- From: the notorious t-e-d
- Re: Launcher relay question
- From: Bob Kaplow
- Re: Launcher relay question
- From: the notorious t-e-d
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