Hello to you all!

I have a DPDT relay HK19F 5 Volts/DC.
The relay is switched with an INPUT signal (see schematic enclosed)
The OUTPUT poles 5 and 3 switches 2 separate (off course) circuits.

Requested is: DELAY the OUTPUT of POLE 3?

Specification of ports:
1.The COM of the relay pole 7= + 5V
2. The COM of the relay pole 2 = -5V (GND)
3. Pole 5 NO is going to an attached circuit without DELAY and starts immediately
4. Pole 3 NC must be attached to an Adjustable TIME delay circuit:

Why is a time delay for the pole 3 NC needed:
with the relay I am switching 2 separate circuits. The first circuit will start immediately when the relay is triggered.
The second circuit will start a few seconds later. This 2nd circuit can only be operated when it is switched through mass/GND.

What I already tried:
1. potmeter, resistor capacitor (RC-network (DIGIKEY RC timer)
2. same as above but then with diode )
3. looking on internet for output delay of OUTPUT contacts of a relay
4. timer delay using CD4093 (https://www.build-electronic-circuits.com/4000-series-integrated-circuits/ic-4093/)
5. All About Circuits webside searched for equivalent circuits

I am NOT searching for:
- an adjustable time delay relay ON/OFF delay; these circuits I have.
- Arduino applications

Thanks for your help in advance.

 

Hello to you all!

I have a DPDT relay HK19F 5 Volts/DC.
The relay is switched with an INPUT signal (see schematic enclosed)
The OUTPUT poles 5 and 3 switches 2 separate (off course) circuits.

Requested is: DELAY the OUTPUT of POLE 3?

Specification of ports:
1.The COM of the relay pole 7= + 5V
2. The COM of the relay pole 2 = -5V (GND)
3. Pole 5 NO is going to an attached circuit without DELAY and starts immediately
4. Pole 3 NC must be attached to an Adjustable TIME delay circuit:

Why is a time delay for the pole 3 NC needed:
with the relay I am switching 2 separate circuits. The first circuit will start immediately when the relay is triggered.
The second circuit will start a few seconds later. This 2nd circuit can only be operated when it is switched through mass/GND.

What I already tried:
1. potmeter, resistor capacitor (RC-network (DIGIKEY RC timer)
2. same as above but then with diode )
3. looking on internet for output delay of OUTPUT contacts of a relay
4. timer delay using CD4093 (https://www.build-electronic-circuits.com/4000-series-integrated-circuits/ic-4093/)
5. All About Circuits webside searched for equivalent circuits

I am NOT searching for:
- an adjustable time delay relay ON/OFF delay; these circuits I have.
- Arduino applications

Thanks for your help in advance.

This is rather confusing. You have told us what you have tried and what you are not looking for, so what exactly are you looking for? What is the threshold voltage level of the control input to the delayed circuit and how much current does the delayed circuit require?

 

So...as an attempt to guess what you are asking...

"I'd like a delay on circuit that is triggered by a normally open relay contact. The normally open contact provides a ground trigger signal when closed. The delay on circuit must have an adjustable time delay and energize a relay when time the delay expires."

 

So...as an attempt to guess what you are asking...

"I'd like a delay on circuit that is triggered by a normally open relay contact. The normally open contact provides a ground trigger signal when closed. The delay on circuit must have an adjustable time delay and energize a relay when time the delay expires."

Then use a 5V time delay relay module. They are available in various configurations.

 

3. Pole 5 NO is going to an attached circuit without DELAY and starts immediately
4. Pole 3 NC must be attached to an Adjustable TIME delay circuit:

Your schematic shows the exact opposite with the NC contact having immediate operation which would happen as soon as power is applied and delayed operation on the NO contact, is this correct?
Also the ground connections are incorrect in the schematic. Below are the corrections I made.

 

This 2nd circuit can only be operated when it is switched through mass/GND.

What is this circuit that activates after a delay? What voltage and current required?

 

This is rather confusing. You have told us what you have tried and what you are not looking for, so what exactly are you looking for? What is the threshold voltage level of the control input to the delayed circuit and how much current does the delayed circuit require?

All circuits are 5 volts DC.
I have 2 output circuits which are connected to the 2 relay-outputs:
1. the 1st circuit , with pole 7 ((COM 2 attached to +5 V line)) is connected to the relay (pole 5 NO) is a flashing light (5 volt DC).
This circuit starts immediately when relay is activated.
2. the 2nd circuit , with pole 2 ((COM 1)) attached to -5V line /GND)), is connected to the relay (pole 1 NC) and must be triggered between 2 and ...... seconds. This circuit is also 5Volt DC

I HAVE MADE A BIG MISTAKE IN my DRAWING . MY APOLOGIES and this has lead to mis-understandings!!!

 

What is this circuit that activates after a delay? What voltage and current required?

All circuits are 5Volt DC. OUTPUT CMOS logic and approx 5-10mA.

 

Your schematic shows the exact opposite with the NC contact having immediate operation which would happen as soon as power is applied and delayed operation on the NO contact, is this correct?
Also the ground connections are incorrect in the schematic. Below are the corrections I made.
View attachment 330530

YOU ARE COMPLETELY CORRECT!!!

 

All circuits are 5Volt DC. OUTPUT CMOS logic and approx 5-10mA.

One suggestion using a cmos 555. Delay appx 3.6 seconds with C1 and R1 values listed.

 

Thanks for the answers. Enclosed the new schematic of the HK19F. SGHioto Thanks for the drawing which I will test.
I had a look at a circuit with a CD40106. First I tested it with a pushbutton and it works. Than I connected it to my ENABLE pin OUT of the connectting circuit. The Time delay is approx 8 secs.
I didn't tested it with the relay.

So, is it possible that the CD40106 delay ENABLE PIN IN is connected to the OUTPUT of the relay pin 4 and as a result that the DELAY OUTPUT (pin 10 of the CD40106) will trigger the circuit which has to be delayed?

 

I have tested my circuit and it is working! the schematic I will post later. Thanks guys! I will also test the circuit of member
sghioto
I will let you know asap

 

I have made the delay before the INPUT of the CD40106 and after this delay, the relay is switching. . The flashing light I have connected to an other OUTPUT circuit .
Enclosed find the new schematic adjustable time delyed relay using cd40106 with trimpot

 

I have made the delay before the INPUT of the CD40106 and after this delay, the relay is switching. . The flashing light I have connected to an other OUTPUT circuit .

It appears you have changed the parameters. So now the relay activation is delayed when Enable IN is high and is the ground out on pin4 of the relay going to be delayed as well?
If so you can use the other half of the 40106.
Connect relay pin2 to 5 volts and pin4 to another Enable IN circuit just like what you have now using two unused gates of the 40106 and drive a transistor to switch to ground.

 

Thanks, I will try it.

 

One suggestion using a cmos 555. Delay appx 3.6 seconds with C1 and R1 values listed.
View attachment 330589

I have tried the circuit and it works but the solution I posted has my preference.
Your circuit however can be used in a lot of other applications so I will keep the circuit in my archive.
Thanks for your help. Regards

 

I have not seen a statement of how much delay is needed. A cheat trick that I have seen when the delay can be very small is to bend the relay contacts slightly. That WILL provide a SMALL delay, which might be small enough. That is sometimes done in transmitters to have the antenna transferred before the carrier is switched on.

 

Sorry for delay in answering: I was in hospital for surgical treatment.(again, pfffffffff!)
the time adjustment i had in mind was between 3-15 seconds.
i have tried it with several resistors and pots.
Re mrBill2 Thanks for the hint. So, there are a lot of small technical possibilities which can make a big difference.