Basic , with Relay's Code Circuit Diagram... - Electronic Circuits Projects Diagrams Free

Hayrettin Demir · 1st January 2008, 04:19 PM

Basic , however effectual a Circuit Diagram.

Edit:English translation in Circuit.

**Nigel Goodwin** · 1st January 2008, 04:25 PM

Why are you posting random pointless diagrams?.

Hayrettin Demir · 1st January 2008, 05:08 PM

Quote:

Originally Posted by Nigel Goodwin

Why are you posting random pointless diagrams?.

Yes.Sorry...
I translate in English this Shema.

ljcox · 1st January 2008, 09:12 PM

I'm not sure why you posted this circuit.

It seems more complex than is necessary. For example, R12 is not required.

I suspect that it could be done with less relays.

Attached is an electronic one that I designed some years ago.

L is the door solenoid.

The counter is advanced each time the correct button is pressed. If the wrong button is pressed, the counter is reset.

ljcox · 2nd January 2008, 02:41 AM

Here is how I would do it with relays.

Hayrettin Demir · 2nd January 2008, 06:46 PM

Quote:

Originally Posted by ljcox

Here is how I would do it with relays.

You design have more nakeds.
...
...
So my shema have very very traps.
Example that have Total Operation Time , and more Turn On and Turn Off Circuits.Thats important.
...
...
Yes , R12 is extra.
...
...
And this topic name is "Basic , with Relay's Code Circuit Diagram... ".
Also with not other Electronic Component.(IC , PIC , or microProcessor).

Hayrettin Demir · 2nd January 2008, 08:43 PM

ljcox · 2nd January 2008, 08:56 PM

Quote:

Originally Posted by Hayrettin Demir

You design have more nakeds.
...I don't understand what you mean by "nakeds". I think you mean weaknesses.
...
So my shema have very very traps. I don't know what you mean by "traps". I think you mean that your circuit includes several techniques to make it difficult for someone to open the door without knowing the code.
Example that have Total Operation Time , and more Turn On and Turn Off Circuits.Thats important. I don't understand "Turn On and Turn Off Circuits". I think you mean delay circuits.
...
...
Yes , R12 is extra.
...
...
And this topic name is "Basic , with Relay's Code Circuit Diagram... ".
Also with not other Electronic Component.(IC , PIC , or microProcessor).
I think you mean that you want to do it with relays, not with electronics.

The "total operation time" in my circuit is done by R1 & C1 & Q2. The timing starts if X1, X2 or X3 are operated. I noticed that your circuit has a delay in the operation of the Door Solenoid. I do not think that is necessary, but this may be one of your "traps" intended to make it difficult to circumvent the system. Such a delay could be added to my circuit if necessary.

ljcox · 2nd January 2008, 09:00 PM

Yes, your point about the invalid buttons is a good one.

In my first design, I had an extra relay labelled E (for error) that operated if an invalid button was pressed. But I felt it was unnecessary, so I removed it and made double use of X4.

However, this leads to the problem you have mentioned.

Here is my first design.

Hayrettin Demir · 2nd January 2008, 09:36 PM

Quote:

...I don't understand what you mean by "nakeds"

nakeds is exposed...

Quote:

I don't understand "Turn On and Turn Off Circuits".

Ok...I explain later.

Quote:

The "total operation time" in my circuit is done by R1 & C1 & Q2. The timing starts if X1, X2 or X3 are operated.

Ok...
...
...
So , please see your in shema error.

ljcox · 2nd January 2008, 09:41 PM

Quote:

Originally Posted by Hayrettin Demir

nakeds is exposed...

Ok...I explain later.

Ok...
...
...
So , please see your in shema error.

What error?

Note that I have just edited my previous post as there was a minor error in the circuit. (D4 should have been D5)

You responded to this post while I was editing it. So you have not read some of my comments,

Hayrettin Demir · 2nd January 2008, 11:26 PM

Quote:

...I don't understand what you mean by "nakeds". I think you mean weaknesses.

Yes.

Quote:

I don't understand "Turn On and Turn Off Circuits". I think you mean delay circuits.

Yes.

But some errors is ;

ljcox · 3rd January 2008, 02:26 AM

I don't see what the problem is.

Your "Error connect" drawing is not correct. DS is not operated directly by B4.

X4 operates when B4 is pressed. DS operates when X4 operates, ie. B4 AND X4 must be operated to operate DS..

When B4 is released, both X4 and DS release.

This is exactly what I intended.

I have made a minor improvement to my circuit.

I have changed it so that if B2 or B3 is pressed out of sequence, relay E operates and releases any X relay that is operated.

Hayrettin Demir · 3rd January 2008, 07:31 AM

ljcox · 3rd January 2008, 08:41 AM

Answers and questions in response to your points:-

1. I'm not sure what you mean. Do you mean that the N/O contact opens 2 ~ 5 ms after the coil circuit is opened, ie. the relay release time? Why is this an issue?

Also, remember that the diode across the coil will increase the release time.

2. X3 is supposed to release when X4 operates.

3, 4. Yes, the current through the X4 contact is Ir + Ids. That is how it is meant to be.Why is this an issue?

I explained how it works in my previous post, ie. X4 operates when B4 is pressed. DS operates when X4 operates, ie. B4 AND X4 must be operated to operate DS.

Hence, X4 and DS both release when B4 is released and the circuit returns to its initial state.

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1st January 2008, 04:25 PM
Nigel Goodwin Super Moderator	Why are you posting random pointless diagrams?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

2nd January 2008, 08:43 PM
Hayrettin Demir Experienced Member	Please Check , ERROR ... __________________ I am sorry my friends... For my English.

3rd January 2008, 07:31 AM
Hayrettin Demir Experienced Member	No , please again check... __________________ I am sorry my friends... For my English.

3rd January 2008, 08:41 AM
ljcox Experienced Member	Answers and questions in response to your points:- 1. I'm not sure what you mean. Do you mean that the N/O contact opens 2 ~ 5 ms after the coil circuit is opened, ie. the relay release time? Why is this an issue? Also, remember that the diode across the coil will increase the release time. 2. X3 is supposed to release when X4 operates. 3, 4. Yes, the current through the X4 contact is Ir + Ids. That is how it is meant to be.Why is this an issue? I explained how it works in my previous post, ie. X4 operates when B4 is pressed. DS operates when X4 operates, ie. B4 AND X4 must be operated to operate DS. Hence, X4 and DS both release when B4 is released and the circuit returns to its initial state. __________________ Len Last edited by ljcox : 3rd January 2008 at 08:51 AM.