momentary 3 position push/pull switch?
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Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=92991
Printed Date: May 14, 2025 at 11:01 AM
Topic: momentary 3 position push/pull switch?
Posted By: paradice1130
Subject: momentary 3 position push/pull switch?
Date Posted: April 01, 2007 at 1:39 AM
Hey guys, got a tricky thing im trying to do, and I dont have full knwolege of using mulitple relays etc. I got a laim ass drawing below to give you some sorta idea, and ill try to make as much sense as possible. Okay, basically what Im trying to do, is I have 3 pneumatic valves. 2 of them are controlling a cylinder, the 3rd is just a valve mounted to a tank. Now, I want to use a Push / Pull switch to operate all 3 valves, but also have a normal toggle switch to operate the tank mounted valve aswell. I also want to have the valves momentary. In the diagram below, the 1 valve in the top right is the exhuast valve on the tank, and the bottom 2 that are attached are the cylinder controlling valves. So Lets start with the Push / Pull switch in the on position. I want it to put 1/2 a second to the intake valve to the cylinder, and at the same time, 1/2 a second to the exhaust valve on the tank. But want it, so that the switch can stay in the on position for as long as it needs to, but having it only giving it that 1/2 second of power once its pulled and thats it. Then, for the Push / Pull switch in the off position, I want it to put 1/2 second of power to the exhaust valve going to the cylinder and thats it. And same thing as in the on position, only puts the power to the device the one time only. Then, my toggle switch, I want to be able to control the tank mounted exhaust valve on constant in the on position, without interfering with any relays etc.
Replies:
Posted By: paradice1130
Date Posted: April 01, 2007 at 1:53 AM
Also wanted to let u guys know, the valve solenoids are 12V and 15 amps.
Posted By: spyderbyte
Date Posted: April 01, 2007 at 4:37 PM
Ok so when you pull out the switch, it allows air to flow from the tank to the cylinder for 1/2 second, then everything stops.
When you push the switch back in (regardless of how much time has passed), the cylinder exhaust opens for half a second.
And finally, you want a separate switch that allows air to flow out of the tank for as long as the switch is on. (Where's the air going to go?)
If someone helps me with how to get pulsed output from constant input, I can help with the relay wiring.
Spyderbyte
Posted By: spyderbyte
Date Posted: April 01, 2007 at 5:07 PM
All I'm missing is how to get a half second pulse, otherwise the following schematic should do what you're looking for.  Spyderbyte
Posted By: paradice1130
Date Posted: April 01, 2007 at 7:08 PM
Yes thats all pretty much right. When the pull switch is pulled out, I want it to operate the intake valve, and the tank exhaust valve both for 1/2 second. The intake valve is going to a cylinder, and the exhaust valve on the tank, is operating as a drain valve. But want it, so when the intake valve is engaged, you hear the exhuast from the tank drain for effect. Then, when the switch, is turned off, pushed in, it engages the exhaust valve from the clynder for 1/2 second. Also, wanted to know, do I need a special push / pull style switch, or will any switch work?
Posted By: paradice1130
Date Posted: April 02, 2007 at 5:39 PM
Than ks for the help Spyderbyte, I really apreciate it. I was lookin around on the site, and found this topin on Constant to Momentary Output. Not sure if its the same kinda configuration I need. I copied & pasted it below. But is this similar? The capacitor allows the coil of the relay to be energized until the capacitor stores a charge, thus de-energizing the coil. The resistor bleeds off the charge of the capacitor when positive voltage is removed from the other side of the coil. You can increase the output time by simply changing the value of the capacitor. This one will give you about a 1/2 second output.
Posted By: paradice1130
Date Posted: April 07, 2007 at 12:07 PM
Anyone else got any ideas? Im ready to put it all together the way spyderbyte showed me, but unsure of how to make it timed ona 1/2 second pulse still. Anybody?
Posted By: paradice1130
Date Posted: April 16, 2007 at 12:59 AM
Hey everyone, does anyone know if someone makes a Momentary 3 Position Push/Pull Switch. But one that is self centered, and when pushed in is on, and also when pulled out is on? Not Pushed in is off, and then you pull out in 2 seqences for on? Thanks.
Posted By: dualsport
Date Posted: April 16, 2007 at 1:31 AM
If your push/pull switch is a single pole double throw switch you should be able to use it to drive two of those constant-to-momentary relay setups for your 1/2 second pulses.
I normally would use solid state devices for time delay switching of the relays, but since the delay time is relatively short, you can get away with driving them directly. There'll be a constant 1.3mA draw by the 10k resistor but I assume that wouldn't be a problem for this.
Posted By: icarus_icarus
Date Posted: April 16, 2007 at 2:53 AM
I know you can get toggle switches like that: https://www.wiringproducts.com/en-us/p_1000.html I've never seen push/pull switches like that, but have where one way is momentary, the other way is a locked postion (marine switches)... ------------- ·Ï¢årµ§·
Posted By: dualsport
Date Posted: April 16, 2007 at 8:54 PM
Could you use something like this or does it have to be a push/pull kind of item?
If you get something that has an off position, you can leave it in the middle so there's no draw at all when it's off.
SPDT toggle
Posted By: paradice1130
Date Posted: April 16, 2007 at 11:04 PM
Thats another thing I was thinking. If I could find a push pull switch, that is off in the center, but has power in the pushed in, and pulled out position, but self centers itself, then I could skip the need for all the realys & timed outputs, etc... I would just do it manually with the switch.
Posted By: paradice1130
Date Posted: April 22, 2007 at 10:06 AM
Well, no luck finding a pusl pull switch like that. I guess no one has any idea how to make this setup work. I guess its impossible, thanks guys.
Posted By: dualsport
Date Posted: April 22, 2007 at 12:39 PM
Hardly anything is impossible, problem here is that you're looking for a particular kind of switch that no one really knows anything about.
Do you already have the switch in your hand and are you able to describe exactly what it does? Is it a SPST switch with Push = constant on and Pull = constant off? Not sure what you're starting with here, if you just have to have a switch that looks a certain way, you're probably the only one that can find it, since no one else could know.
It can be easily done if you wanted to get into using solid state devices for the controls, but if you're looking for a simple relay kind of solution as I think you are, you're right that it's probably impossible.
Posted By: paradice1130
Date Posted: April 22, 2007 at 5:02 PM
Yes, the switch is SPST, except its the other way around, Pull = constant on, Push = constant off. I dont care what method I havce to use, relays, etc.. As long as I can control the devices I want to, with a push / pull style operation.
Posted By: dualsport
Date Posted: April 22, 2007 at 11:01 PM
Here's a test to see how much you want to use a SPST switch- 
If you really want to go through the trouble, it should do what you wanted-
Full size
Posted By: paradice1130
Date Posted: April 23, 2007 at 7:58 AM
Either or I have to do something to get it to work. I appreciate your help, and I would try it. Although, I dont understand what 1/2 of those symbols are, haha, sorry. As I said in the 1st post, I dont know 2 much about electronics, just the basics, and yea, ill tell u right now, other then ground & power, I dont know what any other symbol is on there. Any way you could make that a bit simpler? You also mentioned that there was another way to do it without relays? Is that way alot harder, or more $? Thanks for the help.
Posted By: dualsport
Date Posted: April 23, 2007 at 8:15 AM
I meant there probably isn't a way to do it just using relays, since you don't want to use a switch that has two output positions. If you were willing to use a different switch, then it becomes easier- just a matter of finding a switch that looks the way you want. I'm sure someone out there makes one like that, trouble is finding it-
Posted By: paradice1130
Date Posted: April 23, 2007 at 3:22 PM
yea I know exactly what you mean. If I could find a self centering push pull switch. Which is off in the center, output 1 pushed in, and output 2 puled out, thats exactly what I want. I emeailed a few manfactures & distrbutors, no ones got one. I dont know where to look.
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