Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: 3 way on off on momentary switch suitable for replacing in a transmitter  (Read 516 times)

boat captain

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 437
  • Location: St Helens

Does anybody know of a suitable switch for a futaba transmitter.
Logged
Joe
Liverpool MBC Committee Member
Vice Chairman the Model Boat Convention
Chairman Merseyside Model Boat Association

BrianB6

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 594
  • I'm not sure if I can get up from here
  • Location: Melbourne
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #1 on: September 07, 2017, 04:58:21 AM »

Presumably:
       DPDT Miniature Toggle Switch - Solder Tag Centre Off(on - off - on)
Logged

bfgstew

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 194
  • Comfortably Numb
  • Location: Retford (Robin Hood Country)
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #2 on: September 07, 2017, 07:35:18 AM »

Plenty on flea bay
Logged
Trying: The first step towards failure - Homer J Simpson

boat captain

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 437
  • Location: St Helens
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #3 on: September 07, 2017, 08:17:29 AM »

 I am after a Futaba or or other transmitter type.  I use the ones on fleabay for other projects.
Logged
Joe
Liverpool MBC Committee Member
Vice Chairman the Model Boat Convention
Chairman Merseyside Model Boat Association

bfgstew

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 194
  • Comfortably Numb
  • Location: Retford (Robin Hood Country)
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #4 on: September 07, 2017, 09:19:54 AM »

Logged
Trying: The first step towards failure - Homer J Simpson

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 493
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Logged

Inertia

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,497
  • "Eyup, m'duck!"
  • Location: East Midlands
Logged
'Never argue with an idiot - they'll drag you down to their level and then beat you with experience'

boat captain

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 437
  • Location: St Helens
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #7 on: September 07, 2017, 12:40:28 PM »

Those that have been quoted are not momentary ie spring return to center off.


Thanks though.
Logged
Joe
Liverpool MBC Committee Member
Vice Chairman the Model Boat Convention
Chairman Merseyside Model Boat Association

bfgstew

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 194
  • Comfortably Numb
  • Location: Retford (Robin Hood Country)
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #8 on: September 07, 2017, 01:01:20 PM »

So you need centre position as off and up and down as on with spring return to centre?
Logged
Trying: The first step towards failure - Homer J Simpson

bfgstew

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 194
  • Comfortably Numb
  • Location: Retford (Robin Hood Country)
Logged
Trying: The first step towards failure - Homer J Simpson

boat captain

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 437
  • Location: St Helens
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #10 on: September 07, 2017, 02:20:35 PM »

So you need centre position as off and up and down as on with spring return to centre?


that's correct
Logged
Joe
Liverpool MBC Committee Member
Vice Chairman the Model Boat Convention
Chairman Merseyside Model Boat Association

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,982
  • Location: Blackpool, Lancs, UK
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #11 on: September 07, 2017, 07:03:15 PM »

There might be a switch of that size that has spring return, out there, but I doubt it.  The types pointed to latch in three positions, but have the option that having been switched to one side or the other, can be manually reset to center.
If the circuit that it is to be used in is known, it is often possible to convert a steady state step change of state into a pulse by involving a capacitor.  But you really need to know the exact details of the circuit to get it to work.  Usually, the switch just selects between the three states to give the right signal pulse length which results in, say, a servo, plugged into that channel at the receiver end will take up whatever that position corresponds to.  If its a switcher plugged in, the switcher would be the item that selects between momentary and latching.
Logged
"Trying is the first step towards failure" - Homer (Simpson)

C-3PO

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 311
  • I thought that hairy beast would be the end of me
  • Location: Outer Rim world of Tatooine
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #12 on: September 07, 2017, 07:22:30 PM »

Logged

boat captain

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 437
  • Location: St Helens
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #13 on: September 08, 2017, 07:29:20 AM »

Logged
Joe
Liverpool MBC Committee Member
Vice Chairman the Model Boat Convention
Chairman Merseyside Model Boat Association

C-3PO

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 311
  • I thought that hairy beast would be the end of me
  • Location: Outer Rim world of Tatooine
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #14 on: September 08, 2017, 08:50:51 AM »

Might be worth hitting eBay with the description "3-position spring-loaded centred"

I found some switches that look like they may have same functionality for 2

C-3PO
Logged

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,982
  • Location: Blackpool, Lancs, UK
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #15 on: September 08, 2017, 08:57:42 AM »

http://uk.rs-online.com/web/p/toggle-switches/7347233/
Might be the one, but scrolling down the page you get an options list that lets the site search for near matches.  Quite a few.
Looking on Farnell's site in the switch section and applying their search options gives a few candidates as well.
Logged
"Trying is the first step towards failure" - Homer (Simpson)

Inertia

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,497
  • "Eyup, m'duck!"
  • Location: East Midlands
Logged
'Never argue with an idiot - they'll drag you down to their level and then beat you with experience'

cos918

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,969
  • Location: Abingdon
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #17 on: September 08, 2017, 04:00:07 PM »

momentary contact is what is use on solenoid point motors used in model railways .


john 
Logged

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,982
  • Location: Blackpool, Lancs, UK
Re: 3 way on off on momentary switch suitable for replacing in a transmitter
« Reply #18 on: September 09, 2017, 09:40:57 AM »

momentary contact is what is use on solenoid point motors used in model railways .


john
Nearly - solenoids used "passing contact".  As the switch lever was operated, it would complete the circuit during its passage to the new position, hopefully operating the point.  To avoid cooking the motor, the circuit was broken before the lever got latched in its new position, where it indicated the point setting.  That was true for the Old Hornby switches, and is for the Kato switches that I just looked at. 
A non-latching three position switch that spring returns to center could be used if it could repeatedly carry the current, but the operator would need a good memory.
Looking at the links, any switch shown with the lever off to one side won't be momentary, the ones shown with the lever centered might be.  Careful reading of the spec. needed.
Logged
"Trying is the first step towards failure" - Homer (Simpson)
Pages: [1]   Go Up