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Author Topic: Switch swap ???  (Read 3303 times)

Offline jim gilmore

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Switch swap ???
« on: June 21, 2015, 12:01:20 PM »
I have a 1/2 A electric power system sold by RSM.
It has a simple push button to start the timer/motor...
I'm curious how easy is it to make it have a switch so I can mount just the switch in a location out side my fuselage ...
Wondering if anybody here also uses this system knows?
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Online Tim Wescott

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Re: Switch swap ???
« Reply #1 on: June 21, 2015, 12:22:12 PM »
Do you know whose timer it uses?  Hubin offers a timer with a remote switch; I don't know about Keith Renicle.

I hesitate to say this because you may end up ruining your timer and your plane with it, but if you're up to modifying the PCB you could remote the switch.  It's almost certainly a simple normally-open SPST switch, so if you could identify the right pads on the PCB you could just run a remote switch in parallel.
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The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline John Cralley

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Re: Switch swap ???
« Reply #2 on: June 21, 2015, 01:11:01 PM »
[quDo yoote author=Tim Wescott link=topic=39735.msg406629#msg406629 date=1434910932]I hesitate to say this because you may end up ruining your timer and your plane with it, but if you're up to modifying the PCB you could remote the switch.  It's almost certainly a simple normally-open SPST switch, so if you could identify the right pads on the PCB you could just run a remote switch in parallel.
[/quote]

As Tim said I believe that most, if not all, timers use a normally-open (or sometimes called momentary action) SPST switch to start the timer! That is the switch will return to open as soon as the button is released. You do not want a toggle switch that goes from open to closed....... stays closed  until pushed again when it opens etc.
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Offline jim gilmore

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Re: Switch swap ???
« Reply #3 on: June 21, 2015, 01:47:48 PM »
I am hoping ericRule will see this and answer. I think it might even be just a plug in swap... I think the switch is connected via a small push on connector... just not 100 % sure.
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Offline eric rule

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Re: Switch swap ???
« Reply #4 on: June 21, 2015, 02:10:01 PM »
Eric here Jim..

The push button switch can not be swapped for one of the slide switches without changing the underlying program file in the KR Governor. The reason for this is that the push button switch works differently than the slide  (toggle) switch. 

The push button switch is really designed for use with a profile model or one that has very little space available to fit the motor, ESC, KR Governor & battery into it. That is why we call it the Compact Version. Since you were planning on putting the power system on a profile that is why I sent it to you that way.

If you wish to change over to a slide switch just give me a call at the shop (951-6781406). I will be happy to take care of this for you.

Eric Rule
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Online Tim Wescott

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Re: Switch swap ???
« Reply #5 on: June 21, 2015, 02:21:49 PM »
Quote from: John Cralley on June 21, 2015, 01:11:01 PM
As Tim said I believe that most, if not all, timers use a normally-open (or sometimes called momentary action) SPST switch to start the timer!

Well, that's what I meant to say.  I also meant to say what Eric is trying to get Jim to do: get the right timer for the application and don't mess with it!

FYI, the Igor Burger timer uses no switch at all: the recommended ESC that goes with it has an arm switch on the +5V line; the timer just starts running its program as soon as power is applied.

Tim's Universal Timer, of course, uses whatever kind of switch you want, as long as someone has written a script for it (the two in use are no switch at all, to be compatible with the Igor timer, and an on/off switch to be compatible with my screwy IC experimentation: slide the switch on and it runs at the flight throttle setting so you can adjust the needle, slide the switch off and it starts the flight program, which begins at idle).
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Online Fred Underwood

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Re: Switch swap ???
« Reply #6 on: June 21, 2015, 02:59:37 PM »
I started with a profile fuse and used the non-compact unit with the remote mounted slide switch.  I then changed to the compact unit as it fit much better, but the button was difficult to reach. I use the slide switch with about a 1 second on and then slide to off.  That seems to work fine for a few hundred flights so far.  It may depend on what the program is looking for with the "momentary" pulse, or pulse length/width.  Motor will not run if the switch is left in the on position and shuts off immediately if the switch is turned back to on.

The nice thing about the compact switch is having the pins turned back to make it compact.  Works well for me to still use a remote switch. Or, as Eric suggested...
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Offline jim gilmore

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Re: Switch swap ???
« Reply #7 on: June 21, 2015, 11:08:46 PM »
Well actually I was wondering if there were a different push button switch that would mount better on a model if the nose were built more like the Profile Bearcat the way Al Rabe was building his. I know that I am going to have to buy a second setup soon but was just throwing around the idea of how to redesign my profile models to be how I would prefer them to be. I am on a wait in any event due to issues I have here at home. Life is slowly resolving those issues 1 day at a time.
I am now a GramPa for the second time.....
Birthdays have all been resolved for the yer more or less.
And 1 or two more issues that popped up are close to being resolved so I can have money to spend on my toys again soon.
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Online Tim Wescott

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Re: Switch swap ???
« Reply #8 on: June 22, 2015, 12:57:50 AM »
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AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Online Fred Underwood

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Re: Switch swap ???
« Reply #9 on: June 22, 2015, 09:58:26 AM »
As long as you use the compact unit, a momentary pulse of about 1+ second seems to turn it on.  Get a switch that you want, put the appropriate end on it to connect the 2 pins that turn on/off the chip and then try the switch on your existing set up before you drill holes of commit to the change.  A 2 pin or 3 RC servo or battery lead works well, or you can get computer board type connectors and make your own.
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Offline Keith Renecle

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Re: Switch swap ???
« Reply #10 on: June 23, 2015, 10:01:32 AM »
Hi Jim,
As Eric mentioned, the Compact timer was made for small profile models, and very neat, simple installations. For what your are talking about, the slide switch with the standard timer is ideal. You can of course do what Fred mentions and use a slide switch and just switch it on and after the motor starts up then switch it off again, but that seems counter-productive to me. The slide switch is also nice for larger profiles if you do install it like I do in the pictures below. You can see that I don't even use any small screws either. I just use some of that 1.5 mm (1/16") galvanized household wire from the local hardware store and bend it with a pair of pliers and then stick it into the wood with some CA. I then make a neat cheek cowl to hide all of the plumbing and the slide switch sticks out of the bottom slightly. I hope that this helps a bit.

Keith R
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Online Tim Wescott

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Re: Switch swap ???
« Reply #11 on: June 23, 2015, 10:08:10 AM »
If you're just bound and determined to get a slide switch, you can get momentary slide switches.  They're not as common: http://www.mouser.com/Electromechanical/Switches/Slide-Switches/_/N-5g2x?P=1yzu5jwZ1yzop5aZ1yzuthnZ1z0z1y7Z1yxfk4hZ1z0z1doZ1z0z2niZ1z0z2xkZ1z0z2xmZ1z0z2y5.

If it were me, I would, in very much descending order of desirability:

  • Buy a new timer of the correct type, or
  • Put an external switch on the existing timer, or
  • Put an extension thingie on the existing switch
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AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Online Fred Underwood

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Re: Switch swap ???
« Reply #12 on: June 23, 2015, 10:29:46 AM »
Sorry, I didn't mean to imply that the slide switch was the way to go, but that almost any remote switch can deliver the momentary pulse. As mentioned above, I already had mounted the slide switch using a non-compact unit.  The switch was in place so I kept using it on the compact unit. Other, button type, switches made for momentary may be more appropriate, but the original question seemed aimed at use of a remote switch.  Slide was just an example of remote, and of how little difference the actual switch makes.
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Online Tim Wescott

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Re: Switch swap ???
« Reply #13 on: June 23, 2015, 10:35:21 AM »
Quote from: Keith Renecle on June 23, 2015, 10:01:32 AM
Hi Jim,
As Eric mentioned, the Compact timer was made for small profile models, and very neat, simple installations. ...

That's a neat, clean installation.  So -- how do you like your "Tube 125" ESC, and where can I get one :).
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AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Keith Renecle

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Re: Switch swap ???
« Reply #14 on: June 23, 2015, 10:58:30 AM »
Sorry Tim.......I had that specially made just for me! Neat name huh?? O.K......it's in fact a Hobbywing esc turned upside down! #^
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Keith R

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