Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin  |  Contact Global Moderator
April 22, 2019, 06:30:46 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with email, password and session length
News: Help Support Hip Pocket Aeronautics Builders' Forum and Plan Gallery

You can help support our forum and gallery
by having plans printed by Ratz.

Details and Feedback here: Help Support the Forum & Gallery - Plan Printing
 
Home Help Search Login Register
Pages: 1 [2] 3 4 5   Go Down
Print
Author Topic: Peterborough timer  (Read 8707 times)
0 Members and 1 Guest are viewing this topic.
Sky9pilot
Titanium Member
*******

Kudos: 49
Offline Offline

United States United States

Posts: 2,727


WWW

Ignore
« Reply #25 on: August 24, 2011, 08:42:09 PM »

Hi All,

I tried the SMD resistor...was a flop...too small for my hands and the smallest wire seemed like monster pipe.  So I desoldered the first attempt and got a resistor as Dave suggested...found them at Radio Shack, 5 for $1.29.  Much better looking attempt the second time.

     1. Pic of the first attempt
     2. Comparison of the SMD resistor and the standard recommended resistor
     3. Second attempt

Gotta make the zapper to see if it works...

Tom
Attached files Thumbnail(s):
Re: Peterborough timer
Re: Peterborough timer
Re: Peterborough timer
Logged

Best Regards,
Sky9pilot
    "If God is your Co-pilot, consider switching seats!" 
http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl
http://freeflightarchive.com/index.php/homepage-2
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #26 on: August 24, 2011, 09:08:49 PM »

 Tom,
  Good for you.
 Making the 'ZAPPER' was fun but you can test things by touching a 9 volt battery to the resistor wires. REMEMBER the polarity!
 Wire up your system and give it a go.

 Dave Andreski
Logged

Aspire to inspire before you expire.
boffin99
OOS - August 2017
Bronze Member
***

Kudos: 4
Offline Offline

United Kingdom United Kingdom

Posts: 73



Ignore
« Reply #27 on: August 26, 2011, 03:14:29 PM »

My good friend Ted Szklaruk has posted an article on the PMFC club site which shows you how to wire up a brushless motor and Peterbrough timer giving both time and duration control. The astute will notice that the timer is in the power line so that you will have to match the MOSFET used to the rating of the ESC i.e. the timer sees full battery current.

Herewith the link to Ted's article.............

http://www.peterboroughmfc.org/technical-articles/FETtimerFF.htm

Have fun, Ian PMFC

Logged

Ian Middlemiss UK - Will be missed by all that knew him.
PeeTee
Titanium Member
*******

Kudos: 48
Offline Offline

United Kingdom United Kingdom

Posts: 2,227



Ignore
« Reply #28 on: August 26, 2011, 04:03:39 PM »

Good stuff Ian - thanks for posting!

This could also be used for Open Electric next year as a cheapo timer. I suppose that the only problem is the likely lack of 'Brake' which also affects  those using a servo tester and clockwork timer.

The K&P standard timer does the biz, except that it requires a separate DT, which make DTing "off the top"  difficult during trimming. It's this facility on the Ztron which has saved me on many occasion.

Prost Cool

Peter
Logged
boffin99
OOS - August 2017
Bronze Member
***

Kudos: 4
Offline Offline

United Kingdom United Kingdom

Posts: 73



Ignore
« Reply #29 on: August 27, 2011, 04:28:00 PM »

Peter,

At the last Old Warden , Derek promised a revised productionised kpaero controller with servo DT output by the end of the year. I will follow this up at the PMFC Flying Aces do on the 4th Sept. For me , I am still happy with the standard 2 min controller and a good old Tomy, which I find very reliable and the audible clack is comforting that you have remembered to switch it on. I will try his latest but IMHO, it does not package as well as a Tomy, or perhaps I am just getting too old to appreciate technology advances?

Regards Ian
« Last Edit: August 27, 2011, 05:17:07 PM by boffin99 » Logged

Ian Middlemiss UK - Will be missed by all that knew him.
Sky9pilot
Titanium Member
*******

Kudos: 49
Offline Offline

United States United States

Posts: 2,727


WWW

Ignore
« Reply #30 on: September 17, 2011, 09:04:57 PM »

Hi guys,

I tried to change the small connector on the single cell Lipo....no success....No local hobbie shop had any of them in stock!!!  I tried jumping the connector but got sparks and the cell immediately got hot to the touch...probably shorted the cell out??? Embarrassed :'( Roll Eyes  tried cutting off the end of the battery plastic tip and thought about trying to solder on a new connector.  No success there either.  Finally went on line and ordered what looks to be the proper connectors..."JST" I believe...so testing of the Peterborough timer is on hold for now.... Did get the motors mounted in the Goose and the tissue applied and the wiring run though the wing to the fuselage/wing center section....so waiting on the mail.   Any insights out there??? The connector is the one on the Eflight MCX blade single cell lipo, 130 mili amp I believe cell 3.5 volt...

Tom
Logged

Best Regards,
Sky9pilot
    "If God is your Co-pilot, consider switching seats!" 
http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl
http://freeflightarchive.com/index.php/homepage-2
scrubs
Gold Member
*****

Kudos: 8
Offline Offline

United States United States

Posts: 501



Ignore
« Reply #31 on: September 17, 2011, 10:07:26 PM »

For connectors this is a good place to do business

http://www.rc-connectors.com/

Cheap shipping, free on orders over 10 bucks. If you send him an email he'll tell you what to order.

scrubs
Logged
Sky9pilot
Titanium Member
*******

Kudos: 49
Offline Offline

United States United States

Posts: 2,727


WWW

Ignore
« Reply #32 on: September 18, 2011, 12:08:03 AM »

Thanks Scrubs...I did just this a couple of days ago...but didn't ask the first so I hope I ordered the right connectors...look right Undecided

Tom
Logged

Best Regards,
Sky9pilot
    "If God is your Co-pilot, consider switching seats!" 
http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl
http://freeflightarchive.com/index.php/homepage-2
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #33 on: September 18, 2011, 09:16:03 AM »

For connectors this is a good place to do business

http://www.rc-connectors.com/

Cheap shipping, free on orders over 10 bucks. If you send him an email he'll tell you what to order.

scrubs
Tom,
Scrubs recommended this to me about 6-7 months ago and that's where I got mine from.
Is your battery pictured anywhere here-
http://www.e-fliterc.com/PowerSystems/Batteries/?PageSize=72

Dave Andreski
Logged

Aspire to inspire before you expire.
boffin99
OOS - August 2017
Bronze Member
***

Kudos: 4
Offline Offline

United Kingdom United Kingdom

Posts: 73



Ignore
« Reply #34 on: September 18, 2011, 01:47:50 PM »

Ebay is the place for inexpensive light duty connectors. Try searching on SIL headers or try item number 120689457165.
This will give you a 20 way strip of gold plated headers and connectors for £2.89 which will give you 10 unpolarised plugs for motor connections capable of up to 2 amps. Battery connections, however, must be polarised, so just strip the pins and sockets out of the plastic, solder up and you have the lightest possible connector. There are other ways of making a polarised battery plug from SIL hardware.....see technical articles in the Peterborough web site.
This will show you how to make the 2mm polarised connectors similar to the rc-connectors site at a tenth of the cost.
I have been using SIL hardware for 4 years and would not dream of using anything else in low energy set ups.
Pee Tee has an good alternative , he strips out the pins and sockets in a PC 'D' plug.
JST's ....too fiddly and expensive
Deans....way too big and heavy

Regards Ian PMFC
Logged

Ian Middlemiss UK - Will be missed by all that knew him.
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #35 on: September 19, 2011, 04:24:10 PM »

Here's a couple of examples of what can be used for connectors.
The first are for higher amp draw applications. The 'tip' is eleven years old and the items are still available from Radio Shack.
http://www.gryffinaero.com/models/ffpages/tips/connector/dbc.html

I've been using these from Hobby King-
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=9639

Attached is a pic of the servo connector pins and sockets from HK and a connector made from them.
Top center is a matched m/f pair that weigh ~ .11g.
The completed connector with solder at both ends, naturally, three pieces of heat shrink tubing and seven inches of 28ga wire weighs .56g. This connector is limited by the size of the 28ga wire to about 1.4 amps. Larger wire can be used for higher amp draw applications using the same pin/socket combo.
I'm simply posting what works for me.

Dave Andreski
Attached files Thumbnail(s):
Re: Peterborough timer
« Last Edit: September 19, 2011, 04:42:07 PM by Dave Andreski » Logged

Aspire to inspire before you expire.
Sky9pilot
Titanium Member
*******

Kudos: 49
Offline Offline

United States United States

Posts: 2,727


WWW

Ignore
« Reply #36 on: October 17, 2011, 08:49:07 PM »

Thanks guys...

Dave it's the first battery on the page... I'll have to check the miliamps for sure but I did order some of the same look and size but I believe they're higher than 150 miliamps....

I finally broke down and ordered two new brushless motors after melting the front of the motor trying to shrink some shrink wrap on the motor shaft to enlarge the shaft size.   Wrecked the gearing inside the nose and now it won't turn Roll Eyes Shocked Embarrassed :'( Wink  chalk it up to learning curve...
The motors I ordered are the 18-11(on Climber's chart) recommended by OZPAF on the Outdoor CU Watercraft thread here on HPA HERE I'll be using two ESC's and still working out timer details...
Tom
« Last Edit: October 17, 2011, 09:58:04 PM by Sky9pilot » Logged

Best Regards,
Sky9pilot
    "If God is your Co-pilot, consider switching seats!" 
http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl
http://freeflightarchive.com/index.php/homepage-2
Pit
Palladium Member
********

Kudos: 126
Offline Offline

Germany Germany

Posts: 5,488


aka staubkorb


WWW

Ignore
« Reply #37 on: October 18, 2011, 07:56:17 AM »

I'm still awaiting delivery of the micro props recommened by boffin99 for the unit he sent me Angry - I SHOULD have ordered them from SAMS, but I prefer to give my LHS as much business as possible.  It was slated to go into my peanut MEW GULL, but that plane is nearing completion and will be conventionally powered.

I LOVE playing with the unit, even to taking it to the flying patch to show the RC group.  REALLY raised a few eyebrows Grin.
Logged

A Dedicated Convert to:
WWWoFF (Wonderfull Wacky World of Free Flight)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
Sky9pilot
Titanium Member
*******

Kudos: 49
Offline Offline

United States United States

Posts: 2,727


WWW

Ignore
« Reply #38 on: November 21, 2011, 07:30:40 PM »

My good friend Ted Szklaruk has posted an article on the PMFC club site which shows you how to wire up a brushless motor and Peterbrough timer giving both time and duration control. The astute will notice that the timer is in the power line so that you will have to match the MOSFET used to the rating of the ESC i.e. the timer sees full battery current.

Herewith the link to Ted's article.............

http://www.peterboroughmfc.org/technical-articles/FETtimerFF.htm

Have fun, Ian PMFC

I've still not been successful in getting a brushed motor to work with the time I've built.  I'll keep trying but but on the above post Ted talks about a potentiometer on the FET... I know the schematic I followed didn't have a potentiometer on the FET...and now with brushless motors I'll need something to start the motors like the servo tester but that looks pretty heavy to mount in a free flight model.  Like I said earlier...I still just learning this electric stuff.

Tom
Logged

Best Regards,
Sky9pilot
    "If God is your Co-pilot, consider switching seats!" 
http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl
http://freeflightarchive.com/index.php/homepage-2
boffin99
OOS - August 2017
Bronze Member
***

Kudos: 4
Offline Offline

United Kingdom United Kingdom

Posts: 73



Ignore
« Reply #39 on: November 23, 2011, 02:51:50 PM »

Tom,

Seems like you have given the FET timer a good try and have not mastered it as yet.
If you wish I will sort your effort out. Please contact via PM give me yr email address and I will give you my postal address.
Send me what you have including timer as far as you have got , motor prop and battery and I will sort it out and return it working.

There are 2 ways for the FET timer, a fixed resistor usually 470k and a variable voltage on the FET pins via a 'Zapper'
Or a variable miniature cermet potentiometer usually 1M and a fixed voltage from a pp3 battery of 9v.
Either will provide a motor run time from 10-60s.

The servo tester shown for brushless operation,  stripped out is about 3gms......worry ye not, its OK for FF there are many PMFC models running this system.

Regards Ian PMFC
Logged

Ian Middlemiss UK - Will be missed by all that knew him.
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #40 on: November 23, 2011, 04:05:51 PM »

Hi Ian,
Sorry to be lazy but where can I find these very small 'servo testers'?
Thanks a bunch
Dave Andreski
Logged

Aspire to inspire before you expire.
boffin99
OOS - August 2017
Bronze Member
***

Kudos: 4
Offline Offline

United Kingdom United Kingdom

Posts: 73



Ignore
« Reply #41 on: November 24, 2011, 01:23:24 PM »

Hi Dave,
The servo tester that Ted Szklaruk uses comes from Robotbirds , a UK supplier.You need to remove case and knob and  other bits to get to 3gms.

http://robotbirds.com/catalog/advanced_search_result.php?keywords=servo+tester&x=12&y=13

This is an E-Sky device best available on Ebay

http://www.ebay.co.uk/itm/000504-EK2-0907-Servo-Tester-Adjuster-Esky-Parts-US-/110659822625?pt=Radio_Control_Parts_Accessories&hash=item19c3d6e421

There are much cheaper and smaller servo testers on Ebay, try….

http://www.ebay.co.uk/itm/Hobbydream-FD-Servo-Tester-V1-2-/160644339962?pt=Radio_Control_Parts_Accessories&hash=item25672618fa

Personally I do not use the servo tester but go for Derek Knights kpaero controller about 1.5gms and available from Flitehook . Runs a brushless motor/ESC combo, 3 pots for time, speed and decay. I have about 10 of these and they are the UK market leader. Designed by Steve Glass UK FF specialist.....highly recommended.

Regards Ian
« Last Edit: November 24, 2011, 03:19:40 PM by boffin99 » Logged

Ian Middlemiss UK - Will be missed by all that knew him.
Pit
Palladium Member
********

Kudos: 126
Offline Offline

Germany Germany

Posts: 5,488


aka staubkorb


WWW

Ignore
« Reply #42 on: November 25, 2011, 09:16:19 AM »

My micro props came in yesterday, so I'll be sending an order in for a few timers and motors next week.  I couldn't remove the vibration rotors from the motors I have, destroying one in the process, so I'll get the one Ian reccommended.

Here is a neat little outrunner I picked up this last week.  A TWO gram, 7700kV motorchen for use with a single cell LiPo and a 3 x 2 prop (the prop in the pic).

The shaft is 1mm, case dia. 10mm and the whole caboodle REALLY weighs only 2 grams, INCLUDING wires!  The prop is only 0.86gm.  One Amp max current for ~30 Watts of power.  The data sheet states that it puts out 20 grams of thrust with the stated prop.  The ESC from the company was back-ordered, so I have to wait a bit (seems to be a problem with ALL ESC makers at the moment).  There is a tiny machined alu mount available that is SO light that I had to look to see if it was in my hand (I could "feel" the weight of the motor).  NOT inexpensive, but less than a number of others in this category at 27 Euro (about US $36) from Pichler in Germany.

Should dwork well with the KP unit.

Attached files Thumbnail(s):
Re: Peterborough timer
Logged

A Dedicated Convert to:
WWWoFF (Wonderfull Wacky World of Free Flight)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
PeeTee
Titanium Member
*******

Kudos: 48
Offline Offline

United Kingdom United Kingdom

Posts: 2,227



Ignore
« Reply #43 on: November 25, 2011, 09:34:47 AM »

Pete

Not trying to wind you up, but you could have got it for Eur 15 here http://robotbirds.com/catalog/product_info.php?cPath=56_243&products_id=3332

The main reason for the post is to point out the 1S ESC stocked by Robotbirds. It doesn't have a BEC for the timer, but for mine I just soldered up a Y Lead - dead easy. What's more there is no risk of the customs authorities deciding to slap on VAT & duty.

Peter
Logged
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #44 on: November 25, 2011, 09:46:12 AM »

Pete,
Do you have a 'link' to those 3 X 2 props? I have several but want to have a look.
Thanks,
Dave Andreski
Logged

Aspire to inspire before you expire.
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #45 on: November 25, 2011, 10:06:46 AM »

Hi Dave,
The servo tester that Ted Szklaruk uses comes from Robotbirds , a UK supplier.You need to remove case and knob and  other bits to get to 3gms.

http://robotbirds.com/catalog/advanced_search_result.php?keywords=servo+tester&x=12&y=13

This is an E-Sky device best available on Ebay

http://www.ebay.co.uk/itm/000504-EK2-0907-Servo-Tester-Adjuster-Esky-Parts-US-/110659822625?pt=Radio_Control_Parts_Accessories&hash=item19c3d6e421

There are much cheaper and smaller servo testers on Ebay, try….

http://www.ebay.co.uk/itm/Hobbydream-FD-Servo-Tester-V1-2-/160644339962?pt=Radio_Control_Parts_Accessories&hash=item25672618fa

Personally I do not use the servo tester but go for Derek Knights kpaero controller about 1.5gms and available from Flitehook . Runs a brushless motor/ESC combo, 3 pots for time, speed and decay. I have about 10 of these and they are the UK market leader. Designed by Steve Glass UK FF specialist.....highly recommended.

Regards Ian

Ian,
Thanks for those links.
I found the E-Sky device here-
http://www.eskyhelicopters.com/advanced_search_result.php?keywords=000504&x=12&y=5

Dave Andreski
Logged

Aspire to inspire before you expire.
Pit
Palladium Member
********

Kudos: 126
Offline Offline

Germany Germany

Posts: 5,488


aka staubkorb


WWW

Ignore
« Reply #46 on: November 25, 2011, 10:14:42 AM »

Dave, they are standard GWS micro props.  I ordered them thru my LHS and even tho they were "expedite" ordered, it took almost 2 months to get them.  The blades are paddle shaped and require balancing, tho they are devoid of any moulding "flash".

Pete,
I was informed on the "other" site about Micron Sad.  The motors are one and the same.  The hammer is that I frequent the Micron site quite often. but put off buying one of the little jewels.  Being able to hold something in my greedy paws makes a HUGE difference in making a decision and helps out the LHS.  He was unpacking the stuff as I walked in - he didn't even know it was there before I "had" it. The 3 Amp ESC was back-ordered, tho, and there is NO difference in price or weight to the Micron XP unit (I plan to use it for micro RC as well as FF).
Logged

A Dedicated Convert to:
WWWoFF (Wonderfull Wacky World of Free Flight)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #47 on: November 25, 2011, 10:29:05 AM »

Dave, they are standard GWS micro props.  I ordered them thru my LHS and even tho they were "expedite" ordered, it took almost 2 months to get them.  The blades are paddle shaped and require balancing, tho they are devoid of any moulding "flash".



Thanks Pete,
I thought they may be GWS. These have a shaft hole of 1.3mm or 1.5mm ( I forget)! I bought some and had a heck of a time 'bushing' them down to 1mm for my little motors.
Dave Andreski
« Last Edit: November 25, 2011, 10:45:28 AM by Dave Andreski » Logged

Aspire to inspire before you expire.
Pit
Palladium Member
********

Kudos: 126
Offline Offline

Germany Germany

Posts: 5,488


aka staubkorb


WWW

Ignore
« Reply #48 on: November 25, 2011, 11:02:28 AM »


Thanks Pete,
I thought they may be GWS. These have a shaft hole of 1.3mm or 1.5mm ( I forget)! I bought some and had a heck of a time 'bushing' them down to 1mm for my little motors.
Dave Andreski
Grin I can well imagine that!  I have some (well, half a boatload) of plastic tubing from pushrod "snakes" that are a tight press fit into the prop hub which compresses the inner hole, giving a very good fit to the 1mm shaft.
Logged

A Dedicated Convert to:
WWWoFF (Wonderfull Wacky World of Free Flight)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052


Topic starter


Ignore
« Reply #49 on: November 25, 2011, 11:16:08 AM »

Pete said-
"I can well imagine that!  I have some (well, half a boatload) of plastic tubing from pushrod "snakes" that are a tight press fit into the prop hub which compresses the inner hole, giving a very good fit to the 1mm shaft."

Thanks again Pete.
I just remembered that I have some Sullivan "snakes". I'll try that.
I used small pieces of aerosal lube tubing. Only had a short piece of the correct size of that.
Just this morning I ordered 8 (eight) U-80 props from BMJR Models. They're 3.2 X 2 and cost $1.50 each. Relatively expensive but HALF the price of KENWAY MICROFLIGHT's at $3.00 each. U-80's have a 1mm shaft hole.

Dave Andreski
« Last Edit: November 25, 2011, 01:13:33 PM by Ratz » Logged

Aspire to inspire before you expire.
Pages: 1 [2] 3 4 5   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!