Time Delay Relay II


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jawaharlal@excite.com 200,601 1 39
When activated by pressing a button, this time delay relay will activate a load after a specified amount of time. This time is adjustable to whatever you want simply by changing the value of a resistor and/or capacitor. The current capacity of the circuit is only limited by what kind of relay you decide to use.

Schematic

Schematic for Time Delay Relay

Parts

Part
Total Qty.
Description
Substitutions
C11See Notes
R11See Notes
D111N914 Diode
U114011 CMOS NAND Gate IC
K116V Relay
S11Normally Open Push Button Switch
MISC1Board, Wire, Socket For U1

Notes

  1. Email jawaharlal@excite.com with comments, questions, etc.
  2. To calculate the time delay, use the equation R1 * C1 * 0.85=T, where R1 is the value of R1 in Ohms, C1 is the value of C1 in uF, and T is the time delay in seconds.
  3. S1 may be replaced with an NPN transistor so the circuit can be triggered by a computer, other circuits, etc.
  4. Most any 6V relay will work for K1. If you use a large relay, you my need to add a transistor to the output of the circuit in order to drive the larger load.

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Comments

Add A Comment

Barry R
Time Delay Relay II
Friday, August 23, 2013 3:26:14 PM
I am using a Digital Safe and when the circuit is activated the output pullsdown a 6 volt solenoid - Problem is the output pulse is only 1 second - Needs to be 6 or 7 seconds (Power supply is 6 volts and output to solenoid is 6 volts) Circuits I have viewed seem to require 12 volts.
ahmed
2 second on and 2 minutes off countinious working timer
Friday, May 06, 2011 7:38:39 AM
Dear Sir, I want to curcuit for 2 sec on and 2 min off time contionuesly working type curcuit. please help me. very urgent. tks ahmed.

(Editor's notes: See the 556 timer IC datasheet.)

anonymous
Time Delay Relay II
Sunday, April 10, 2011 10:48:15 PM
hello i need a time delay relay for 8 hours.(12 v DC or 230 v AC) when ever power on a relay switch on after 8 hours i hop you can help me thank you
giedrius
Time Delay Relay II
Friday, February 04, 2011 9:12:44 AM
not working. something is wrong with wirings. delay is 2 s. and cnaging capacity of r and C makes no changes on interwal.
Layanal
2 second on and 3minutes off countinious working timer
Sunday, May 23, 2010 10:50:31 PM
Dear Sir, I want to curcuit for 2sec on and 3 min off time contionuesly working type curcuit. please help me. very urgent. tks Layanal
anonymous
Time Delay Relay II
Monday, April 06, 2009 12:52:52 AM
Your Note # 2 above reads 2, To calculate the time delay, use the equation R1 * C1 * 0.85=T, where R1 is the value of R1 in Ohms, C1 is the value of C1 in uF, and T is the time delay in seconds. Shouldn't that read C1 in farads?
CK Ong
Time Delay Relay II
Monday, February 09, 2009 11:40:23 AM
Hi there, I'm a 3rd year student looking to build a simple variable delay circuit to delay continuous pulses to LEDs from an arbitary waveform generator. I'm wondering if this design is feasible for delays in the range of about 100 nanosecond to 10s of microsecond? Please advice, thanks. Best Regards, CK Ong
robin
Time Delay Relay II
Saturday, November 15, 2008 10:53:48 AM
Following your notes, I put R-1 = 50 ohm and C-1 = 10 microFarad to get timer on about 7 minutes after connecting toggle S-1 ( 50x10x0.85 = 425 seconds, equal to 7 minutes plus). With toggle S-1 still connected, I'm waiting my 6 volt relay on. But after 20 minutes there's nothing happened .... May I have your kind advice for such problem ... shall I check certain point in that circuit ? Thanks so much for your kind attention. Robin - Jakarta
Patick S kennedy
Time Delay Relay II
Friday, October 31, 2008 11:53:31 AM
I'm looking for a timmer or timing circuit for a start of day/break/lunch/end of day bell.What is needed is a timmer that will ring the bell at the start of a period and ring again at the end of the period.The bell system already exsists and the owner does not want to replace it. Thank You Patrick S Kennedy Natco Industries West Warwick RI
Craig
Time Delay Relay II
Monday, October 27, 2008 11:38:18 AM
I am building a component that needs to activate a 12vdc 2amp solenoid for 2 or 3 seconds after a trigger switch has sent a signal. The trigger switch is human activated and will not stay open for the full 2 or 3 seconds. Is there a simple circuit for this operation that you know of?
Mauricio
Time Delay Relay II
Wednesday, October 08, 2008 8:00:47 AM
Hi there. I want to make a paintball 'bomb' that after 10 min activates the relay, which is connected to an alarm siren, but also 1 min from the end (at 9min.) it activates another siren, a warning siren... I already have the sirens. I also wanted a beep sound every second so that the bomb can be traced. I don't mind having 3 different circuits but need help to make them... Been trying to but the 555 timer is on at the start but the 4011 might work... Thanks in advance
anonymous
Time Delay Relay II
Friday, September 19, 2008 9:46:18 AM
te first time you switch S1 on in works ....but te second time te circuit doesnt works as it should ...te capacitor beeing carhged from the first time ...there will be no delay on te second push of S1 ( excuse my english :D )
Steve
Time Delay Relay
Saturday, May 31, 2008 4:22:47 AM
With reference to the Time Delay Relay page, if activated (by S1), the circuit should keep the relay on for the fixed time, say 20 seconds. However, after it switches off at the end of the first 20 seconds, it is not clear whether the relay will switch on again, i.e. S1 continues to be active.
Genlock
Time Delay Relay II
Wednesday, May 21, 2008 10:16:25 AM
Can a 555 timer be used to delay the output for 1 second after the footswitch is actuated?If so how is it configured.
Genlock
Time Delay Relay II
Wednesday, May 21, 2008 10:13:38 AM
I need to trigger an X-ray tube 1 sec after an imager and disconnect when the switch is open.I'm using a footswitch.I figure 1 mega ohm and 1 microfarad cap should give me 1 second.It may need to trigger up to 120 volts ac by relay.Will your circuit do this for me and do you have any suggestions?
peter
Time Delay Relay II
Thursday, April 03, 2008 8:06:55 AM
wat resistor can i use to make the time delay 11 cct trigger after 2hours? peter
leo
Time Delay Relay II
Monday, March 03, 2008 12:05:32 PM
I want to know how much volt and uf is C1 and R1 and I can use 12vdc relay for this time delay relayII and if I want for 10 to 15 second delay shut off it can be modified
Bart
Time Delay Relay I and Time Delay Relay II
Monday, February 04, 2008 6:10:49 PM
I have viewed both of your circuits and I have a question. I need to make a time delay device that when I press S1 there is a 30 second frame of no output (0 volts) and after those first 30 seconds a 5 second output of 6-12 volts. Whether that'd be in a loop or 1 time only thing doesn't matter much to me. Is it even possible to make something like that happen using the 555 chip? I just wanted to ask before I start to make yet another circuit on my breadboard and find out that it was a waste of effort and maybe components. Here's a little graph I put together showing what I basically hope it'll do. http://i38.photobucket.com/albums/e123/uni_vision_tech/timedelay.jpg Thanks for your time. Sincerely, Bart K.
Ronald
Time Delay Relay II
Tuesday, January 29, 2008 12:56:51 PM
can u plz forward me a 7 segment time relay diagram which set in 3mins and then if u push the switch it will add an another 3mins. thanx
uri
Time Delay Relay II
Monday, January 28, 2008 8:03:12 PM
I am looking tor timer relay where I can set the on time from 0-5 minuts and the off time from 1-60 minuts do you have anything like that?
obo
Time relay switch
Tuesday, January 15, 2008 12:09:26 PM
I need someone to tell me what a TIME RELAY SWITCH is.
aBgert Hobbsnonymous
Time Delay Relay II
Tuesday, January 01, 2008 4:50:47 PM
I need some relays that will turn off after 7 minutes on and soe that will come on for 20 minutes then shut off. Please let me know if you can help me and what the cost is. This will be for a small 9 volt load with only mm amps. Thanks Bert E-mail is: berthobbs@insightbb.com
anonymous
Time Delay Relay II
Wednesday, December 19, 2007 10:02:55 AM
Also to stop relay chatter when handling big loads on the relay, I would suggest a 27pf ceramic cap in parallel with the diode. Better still switch the relay with a transistor
anonymous
Time Delay Relay II
Wednesday, December 19, 2007 9:59:22 AM
The diode stops back emf which will destroy the relay or & the cmos chip
luis
Time Delay Relay II
Thursday, December 06, 2007 9:25:02 PM
the circuit not work for me.sugestions?
luis
Time Delay Relay II
Thursday, December 06, 2007 7:33:08 PM
Can you tell me if this circuit works on 5 VDC and the value of R and C for delay time of 20seconds.best regards from Argentina
anonymous
Time Delay Relay II
Wednesday, October 31, 2007 1:06:09 AM
hey what resistor and capacitor would i need to gain a ten second delay on a 3volt(2 double a's) battery and motor?
fhuertorres
Time Delay Relay II
Sunday, October 07, 2007 7:04:12 PM
Can you give me the value of R1 and C1? Also what transistor do I need to drive a regular car 12VDC relay for K1?
Diego
Time Delay Relay II
Sunday, September 09, 2007 11:55:11 AM
alright once the circuit is activated.. it has to stay on? because what i need to do is just a push button type of function with the delay relay.. i need to power something up that only uses a push buttom type of swtich so i dosnt need to stay on all times.. just for a sec thanxs
Anthony
Time Delay Relay II
Tuesday, August 07, 2007 2:55:11 PM
I am working on application that requires 24 or 12 VDC fan to be switched clockwise and counter clockwise rapidly. I will use the overall DPDT relay to switch the polarity. The question is: Do I have to wait until the blades of the fan will stop or slowdown, until it will be safe to run in opposite direction and use the delay relay or the polarity may be switched immediately without any delay?
anonymous
Time Delay Relay II
Wednesday, July 25, 2007 4:38:34 AM
i would like to know if this would work to delay a switch for about 5 to 10 sec. before truning on a item. so that way if someone turn on my light switch it would not power up for 5 to 10 sec. as a joke
Joseph Mastropaolo
Time Delay Relay II
Saturday, July 14, 2007 1:11:37 PM
We have a buzzer that we would like to stay activated for about two seconds once the circuit is completed using a 9 VDC battery. Can you help us?
anonymous
Time Delay Relay II
Saturday, June 09, 2007 10:22:47 AM
Are you sure you want a 6V relay on a 9V supply? Also, what is the purpose of the diode, please?
anonymous
Time Delay Relay II
Saturday, June 09, 2007 10:20:21 AM
These CMOS chips are good until 15V. So if you want to use 12V instead of 9, its ok
Randolph Knipp
Time Delay Relay II
Tuesday, May 01, 2007 2:00:50 AM
This appears to be something that even a klutz can do (my particular status). I have a heckuva time soldering these fine little pins, and would prefer to use a wire wrap tool and 30 gauge wire for the circuitry, but have a bit more power off the relay. The 12vdc solution would be best too, since my application is for a 5 second time delay for a wheel chair release in an automobile. Would you publish a 12vdc solution, please?
gaurav
Time Delay Relay II
Thursday, April 19, 2007 11:25:42 AM
can u give me more detauls about pricing delivery etc

(Editor's notes: Nope.)

Studio_60
Time Delay Relay II modification
Friday, April 13, 2007 10:07:49 PM
First off, your email address is not accepting messages as its acting like an invalid-email address. How can your circuit be adapted so an input voltage of 12vDC (without switch) starts a 5 second delay, before relay locks on and stays on as long as voltage is present? relay specs: 12dc 30ma 400ohms
Karthik
Time Delay Relay II
Monday, March 26, 2007 10:35:11 AM
Can u give me more details about this Relay
saeed
Time Delay Relay II
Tuesday, March 13, 2007 12:06:55 AM
We will write you after test this equipment I really need very much
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