Looking to cycle an output every second input.

[Dantz36]

I am working with a 24VDC system and need to actuate a solinoid valve every 2nd time that I get a signal. We dont have a PLC so I am trying to do it with relays. Does anyone know of a way to do this or another componant that may be helpful? Any and all help is greatly appreciated.

 

[FoxyRick]

I suppose it's possible to make a T-flipflop from relays...

I found one:

https://tams-www.informatik.uni-ham...webdemos/05-switched/20-relays/flipflop3.html

 

[Dantz36]

Thanks FoxyRick, This looks like a very doable solution. I will let you know how it turns out.

 

[sky_123]

Maybe exotic (I don't know): a 'step' relay is available from some manufacturers, e.g. Finder. I only used it once
(to switch on/off a mains load based on a push-switch). It is more expensive of course : ( but was convenient, I
needed a quick solution to turn on/off the waste disposer in a kitchen!

 

[ALERTLINKS]

What is the duration of solenoid activation or it is just like a bistable. Every second pulse turns it on or off?

 

[Dantz36]

It is bistable. Example: Pulse 1=on, Pulse 2=off.

 

[FoxyRick]

For step relays, see here:

https://uk.rs-online.com/web/genera...lse&cm_sp=PCA-_-Automation LP-_-FinderArchive
https://uk.farnell.com/finder/20-22-9-024-0000/relay-step-modular-24vdc/dp/1169290

 

[ALERTLINKS]

If you dont want to use relays, here iis a simle solution.
Bistable operation


Bistable operation with skipping pulse

 

[Dantz36]

Alertlinks, These look a little out of my league for right now however i would love to learn all about this. Will the second one acctually work like a flip flop?

Bistable operation with skipping pulse

 

[ALERTLINKS]

Both circuits work like flip flop. The difference is,
The first one work like this.------ Pulse1->on. Pulse2->off then repeat------
The second is--------- Pulse1->on. Pulse2->No action. Pulse3->off. Pulse4-> No action then repeat------