Hi Guys,

I don't know if any of you able to give me advise but I have a problem and need help.

Basically I have a credit card machine the gives out a 5no. 5v pulse, all lasting 10ms with a 10ms gap in between each one, I some how need to make it then give 5no. volt free pulses which switch a 24v ac machine.

Is there an easy way of doing this, such as use a relay (or are the pulses to quick to energise the coil) or is there something special I need to buy to be able to do this?

Thanks in advance.

Matt

 

5no. volt

What does that mean? Not a voltage reference I've ever heard of.

 

Volt free pulses?

Bob

 

Yes, volt free pulses that switches a 24v ac machine

Matt

 

If it's a pulse it has volts, so you need to tell us what you mean by "volt free"?

 

As I said the credit card machine gives out 5no. pulses at 5v but to activate the machine it needs 5no volt free contacts to be made.

Basically they have given us two cores off there machine controls that when touched together 5 times activates and starts the machine for a set period of time.

Hope this is of more help.

 

Why does the AC machine need five pulses to get it started?
How long must it run for once started?

 

Try using a CD4016 quad switch, 10mSec is too fast for a relay, if you need five gates you will need two chips.

 

As I said the credit card machine gives out 5no. pulses at 5v but to activate the machine it needs 5no volt free contacts to be made.

Basically they have given us two cores off there machine controls that when touched together 5 times activates and starts the machine for a set period of time.

Hope this is of more help.

Nope, not helpful. Repeating the same thing adds no clarity. Pedantically defining each piece of information however is helpful, as is avoiding any and all acronyms.

I have no idea what 5no means, or free contacts, nor what touching something called a core means.

 

I assume 5no means "five in number".

 

Please post the links of credit card machine, if you have the datasheet also upload or post the links.

 

Nope, not helpful. Repeating the same thing adds no clarity.

Maybe if he posted in all caps, we could understand.

 

I think that Dodgydave is on the right track. OP is saying the 24Vac machine requires 5 sequential closures of a "dry contact" switch. The credit card machine puts out five sequential 0-5V pulses. The question is, is there really 24VAC at the input of the 24Vac machine?

Then I could be completely wrong.

Ken

 

Hello,

When you want to switch AC with an optocoupler have a look at the AQV21.

Bertus

 

I think the op means "5 normally open contacts" and he wants to make them to pulsed ones.

 

"The credit card machine has a normally open output. It is closed and opened five times to supply 5v to the machine in order to activate it. "

Is this close?