One output every cycle to be converted to 2 output alternatively

Available: i have a ready outout from a relay after every cycle. Required: I need a circuit wherein the above relay produces output in other two different relays alternatively Explanation: relay 1 is activated after each cycle of 360 ° of a cam.

in cycle no 1, relay 1 is active; relay 2 should be active,relay 3 must be in-active in cycle no 2, relay 1 is active; relay 3 should be active,relay 2 must be in-active in cycle no 3 , relay 1 is active; relay 2 must be active; relay 3 must be inactive and so on..........

Hope i have explained properly; thanks

This is a good job for a PLC...

Relay 1 is active for how long ? Is relay 1 activated by a contact switch or How ??

If you have a Top-Dead-Center (TDC) contact ( as an example), that contact could be used as a to toggle another relay ON/OFF. The contacts of that extra relay can control relay 2 and 3.

That's a finite state machine ( a very simple one ).

You need a modulo-3 counter with the outputs est individually for each count.

Quite simple but the fun's in doing it.

Graham

other two different relays alternatively

Not really... three type D flip-flops will do it...

...Wait, in the OP's example, relay 1 is always on. 2 and 3 just alternate. A single type D will do it, or since relays are the word of the day, a toggle type relay will suffice.

Tim

So you want outputs A and B to be alternatively active, but only when relay 1 is active, right? No output when relay 1 is not activated?

I think this can be done with just 3 relays and nothing else. If nobody else figures it out before this evening, I'll give it a shot.

See "relay logic" on ABSE. Two DPDT relays and one 4PDT relay -- or four DPDT relays. No electronics.

One of these could be the relay you already have that produces the "input" signal.

There are a lot of ways to arrange this. I tried to do it without any race conditions to avoid glitches or ambiguities when relays are changing state.

You're looking for a semiconductor solution then ?

Graham

Hi, Manju. I'd think you're looking for what's called an alternating or impulse sequencing relay. It changes state when the coil is de-energized, and the position of the contacts are magnetically maintained on power off. One good example of this is the Magnecraft

Your description could be clearer, but from the way I read your problem, this will do the job (view in fixed font or M$ Notepad):

| | | SW1 RY1 | | | _/ / \\ | | o-o/ o-o----------o--( )----o | | | | \\_/ | | | | | | | | | | RY4 | | | | | / \\ | | | | '--( )----o | | | \\_/ | | | | | | | | CRY4 RY2 | | | | || / \\ | | | | ||--------( )----o | | | || \\_/ | | | '---| | | | ||/ RY3 | | | ||---- / \\ | | | /|| '---( )----o | | \\_/ | | | | | (created by AACircuit v1.28.6 beta 04/19/05

Your cam switch is SW1, and the alternating relay is RY4. Note that RY1, 2, and 3 are only on when the cam switch is on. The alternating relay coil is typically the slowest, so a chase situation or momentary false energizing at turn-off won't result.

If you don't need separate relays, but only want to energize loads 1,

| | | SW1 | | | _/ ___ | | o-o/ o-o--------o-----|___|---o | | | | Load 1 | | | | | _ | | | | | / \\ | | | | '-----( )---o | | | \\_/ | | | | RY1 | | | | | | | | CRY1 | | | | || ___ | | | | ||---------|___|---o | | | || Load 2 | | | '---| | | | ||/ | | | ||---- ___ | | | /|| '----|___|---o | | Load 3 | | | | | | (created by AACircuit v1.28.6 beta 04/19/05

I hope this has been of help.

Good luck Chris

I am sorry, but I do not understand this.

"Relay 1 dwell is around 0.25 seconds"....

So relay 1 is not on the entire time ?? Does this mean the Relay 2 & 3 will be on for only 0.25 seconds ??

I was looking for the simplest solution, but I see you already have that.

Please add a more detail on how sophesticated you would like to get.

We will all try to help.

donald

PS: I am a microprocessor engineer, so My solution would have a uP in it. I hope that would not be a problem for you.

Update: it can be done with two DPDT relays and one SPST relay. See "relay logic" on alt.binaries.schematics.electronics.

It can also be done with electronics or a microcontroller -- but then you must signal-condition the drive signal, provide a power supply, build a board with relay drivers or load switches, put it all in a box .....

or, grab 3 relays, a bit of wire, a bag of crimp terminals and a crimper and put it together in less than an hour.

In message , dated Tue, 5 Sep 2006, Don Foreman writes

Crimper? You need your hair styled while you are building the controller?

Hair?

yes, you need a flop flop relay.