Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Doctor is In! > Ask the Doctor
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-27-2015, 02:20 PM
UlteriorModem UlteriorModem is offline
Intermediate Rocketeer
 
Join Date: Sep 2015
Posts: 81
Default Estes Pro series II launch controller question....

I have been looking at the Estes Pro series II launch controller as an upgrade.

By default it uses 4 C cell batteries but they also mention it accepts alternate power sources.

However it does not go into any detail about what power sources and how. I did see one mention of someone using a LiPo and that makes me curious as I have lots of those and know they can deliver tremendous amounts of current very quickly from a small package and would seemingly be ideal.

Anyhow I searched the web and came up empty.

Anyone know or have some linkage??

Thanks!
Reply With Quote
  #2  
Old 09-27-2015, 02:43 PM
Rex R Rex R is offline
Craftsman
 
Join Date: Feb 2011
Posts: 473
Default

the only launch controller I found by that name uses 6(six) C cells (alkaline). it has a 'JST' socket in the battery compartment for external power(off hand I would suggest a 3s lipo pack if you want to go with that option). the 30' launch wire is IMO a tad short, 40 - 50' would be better. from what I could find via a google search(which led to the rocketry forum) it would appear to be a serviceable unit.
Rex
Reply With Quote
  #3  
Old 09-27-2015, 02:52 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 2,286
Default

I have two of them. I like 'em.

One of them has an Electrifly 3s LiPoly inside. It works very nicely and has even managed to fire the infamous Copperhead ignters a couple times. As Rex noted there is a two-pin JST socket inside for the alternate power source. Space inside is kind of tight because this alternate power source has to fit between the springs for the C-cells.

Heck - I should just go grab it, take a couple of pics with my iPhone and post 'em here.

Back in a little while......
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #4  
Old 09-27-2015, 03:24 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 2,286
Default

OK - here we go.

This particular unit was inadvertently left behind at a launch in eastern Washington and collected several days later after it had been rained on a bit - no issues.

An odd feature is that there are two clips on each of the two leads - essentially a built-in clip whip. The trick is to get one clip from each on the igniter

Pictures - exterior with a ruler and an Electron Beam for scale. Then back cover, open with the 3s 1200 mAh LiPoly in it, some details of how that's connected, and a view with the C-cells.
Attached Thumbnails
Click image for larger version

Name:  IMG_465076680.JPG
Views: 74
Size:  781.9 KB  Click image for larger version

Name:  IMG_465076712.JPG
Views: 37
Size:  675.5 KB  Click image for larger version

Name:  IMG_465077217.JPG
Views: 102
Size:  627.7 KB  Click image for larger version

Name:  IMG_465076788.JPG
Views: 75
Size:  517.5 KB  Click image for larger version

Name:  IMG_465076815.JPG
Views: 62
Size:  577.8 KB  
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #5  
Old 09-27-2015, 03:25 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 2,286
Default

Only five per post, so here's the C-cell view - note it takes six, not four.

This controller is like a couple of its predecessors in that it takes two hands to fire it. The yellow button on the left is essentially a second arming (after the key is in) and a beeper sounds. You have to hold that one down and press the red one to fire the igniter(s).
Attached Thumbnails
Click image for larger version

Name:  IMG_465076896.JPG
Views: 35
Size:  607.5 KB  
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #6  
Old 09-27-2015, 04:03 PM
UlteriorModem UlteriorModem is offline
Intermediate Rocketeer
 
Join Date: Sep 2015
Posts: 81
Default

Wow perfect!

I cant thank you enough. Answered every question I had.

Thanks!
Reply With Quote
  #7  
Old 09-27-2015, 04:38 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 2,286
Default

You're welcome. I like when I can actually answer a question.
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #8  
Old 09-28-2015, 03:46 PM
samb samb is offline
spirit of 72
 
Join Date: Aug 2006
Location: Plano, TX
Posts: 248
Default

$28.39US at Hobbylinc this week. http://www.hobbylinc.com/estes-pro-...controller-2240

And Bernard is just being modest. He has (almost) all the answers !
Reply With Quote
  #9  
Old 09-28-2015, 04:07 PM
UlteriorModem UlteriorModem is offline
Intermediate Rocketeer
 
Join Date: Sep 2015
Posts: 81
Default

I know Bernard has a lot of answers Ive been cruising these forums for a while now. The photographs helped a ton and showed me pretty much exactly the setup I want to go with using a 3S 1200mah lipo of which I have about 6 of them and the proper chargers etc.

Thanks for the heads up on the sale but I have one on order already. Ran out and ordered it almost as soon as I saw the info. Only paid about 5 bucks more so....

Has anyone been inside of one of these controllers? Wonder how the continuity check is done. If there is transistors or relays for low current checks or if its basically a big "Electron Beam" type circuit with maybe a resistor and LED?

Oh by the way I notied on Bernard's lipo a date stamp of 06/06? If so you sure got your moneys worth out of that one!!
Reply With Quote
  #10  
Old 09-28-2015, 05:15 PM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 1,725
Default

I am assuming the PSII launch controller just uses one of a variety of premade piezoelectric buzzers available. I installed in an Electro-Launch for school launches, since the buzzer gets everyone's attention, whereas a continuity light does little for a big group of school kids out on the playground.

The buzzer I bought was from Radio Shack (many years ago -- not sure they are still open ...). It is housed in a small round plastic enclosure, with leads protruding from the bottom -- suitable for panel mounting. I ground down the raised area on the controller around the bulb, and epoxied the buzzer in place over the bulb opening. It is wired into the launcher in place of the bulb, soldering each lead to one of the two contacts for the bulb. I do not recall the current draw, but it is pretty low (under 50mA), and is therefore safe for low-current igniters. A Google search shows many piezo buzzers that operate on voltages from about 3V to 15V, and from 10mA to 50mA or so), so there are a lot of buzzers available that are well suited to handling continuity checks safely.

Another mod I made was to ditch the 4 AA batteries inside the controller, and add leads for an external 12V gel cell battery. This controller will fire igniters all day, and was especially handy for group launches. We would typically launch around 100 rockets on the playground each outing. I never worried about the battery power running down.

If I were to make another launcher today, I'd substitute a 3S lipo battery (nominally 11.1VDC) due to their smaller size and lighter weight, but a gel cell battery is a great launch battery for dependable, long-lasting power.
__________________
Lee Reep
NAR 55948, L2

Projects: Super Sky Hook, Estes Saturn V
In the Paint/Detailing shop: Estes Saturn 1B
Completed!: Der Saturn Max
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 07:40 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2018