Time Delay Relay


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A time delay relay is a relay that stays on for a certain amount of time once activated. This time delay relay is made up of a simple adjustable timer circuit which controls the actual relay. The time is adjustable from 0 to about 20 seconds with the parts specified. The current capacity of the circuit is only limited by what kind of relay you decide to use.

Schematic

Schematic for Touch Switch

Parts

Part
Total Qty.
Description
Substitutions
R111 Meg Pot
R2110 K 1/4 Watt Resistor
C1110uf 25V Electrolytic Capacitor
C210.01uf Ceramic Disc Capacitor
D1,D221N914 Diodes
U11555 Timer IC
RELAY19V Relay
S111A 120V SPST Switch
MISC1Board, Wire, Socket For U1

Notes

  1. R1 adjusts the on time.
  2. You can use a different capacitor for C1 to change the maximum on time.
  3. S1 is used to activate the timing cycle. S1 can be replaced by a NPN transistor so that the circuit may be triggered by a computer, other circuit, etc.

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Comments

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Tara Chand
timer ckt
Friday, August 19, 2016 9:23:48 AM
i want a timer ckt which works 60 sec. in 2 hours and this is repeately. this ckt used in agriculture purpose, out the water from water tank only for 60 sec. and off.
Paco
Time Delay Relay
Wednesday, May 04, 2016 1:42:30 PM
Thanks Aaron for the original circuit and thanks to WillyAG for the little mod needed for my purposes.
pavan
Time Delay Relay
Monday, April 21, 2014 9:02:43 AM
If I want to use a 5v relay which parts of the circuit is to be changed. can the power supply can be reduced to 9v while using a relay of 5v. Expecting that I got an answer
Tony
Time Delay Relay
Saturday, February 08, 2014 5:54:21 PM
I need someone to make me a very small circuit that is on for 10seconds and off for 60 seconds and then it repeats over and over using a 3v cell battery
Steve W
Time Delay Relay
Tuesday, May 21, 2013 12:38:44 PM
This was EXACTLY what I needed to complete my project. Thank you so much for taking the time to post it.
ruel
i want to supply it 24v and my relay is 24v but i wont operate
Saturday, December 29, 2012 10:56:41 PM
i already get the cicuit in 12 volt,but my problem is i would like to increase my voltage into 24v so also increases my relay into 224v but wont work or oerate,pls help what to add components or change?i want 24v dc to run my motor
Billy
Time Delay Relay
Thursday, December 13, 2012 1:29:45 AM
If I use 9V as my input power supply,,,, do I have to change anything else??? And,,, I am not going out to a relay,,, I am going directly to an E-Match,,, to trigger an ejection charge in a model rocket.... But I do want all the power I can get,,, to make sure the charge ignites.. Thanks...
mok
Time Delay Relay
Sunday, April 29, 2012 11:48:40 PM
I'm looking to adjust the time of the delay for 1week. How do I calculate the change required to the capacitor? i want to know more about delay...
Indrajit Biswas
Time Delay Relay
Tuesday, February 28, 2012 9:21:09 AM
Thanks for the circuit diagram. Last some days I was searching the same, which I want to used. I hope it will help to me.
Chris Stewart
Time Delay Relay
Saturday, January 21, 2012 6:37:01 PM
Aaron, I have know you through the RX-7 world for years. But when I go to search for a time delay relay to build one, your site comes up second on Google. Mind blowing. Water level low>water valve opened (heating system)
landon
Time Delay Relay
Wednesday, January 11, 2012 10:27:41 AM
I think this is exactly what I've been looking for! Thank you! Will this also work with a 12V relay, or is it limited to 9V? What would have to change to get it to work with a 12V relay?
gading
Time Delay Relay
Friday, September 16, 2011 4:47:36 AM
Hai this is a good delay that ever I see, but If I want to change Switch S1 with Light sensor switch, how this two circuit connected
Dave H
Time Delay Relay
Sunday, August 07, 2011 7:11:37 PM
i built this and get ~ 8 secs delay, I will try larger C1 for longer BUT there is a current drain when switch is off which will flatten the small battery in my circuit I need zero current drain when off! How can I achieve this please.
anonymous
Time Delay Relay
Tuesday, July 19, 2011 3:19:26 PM
hi can the relay be replaced with a transistor of some sort ad if so how would it be used to trigger a camera flash thanks
tala
Time Delay Relay
Friday, January 21, 2011 12:58:36 AM
hi can i use this to delay an output of another circuit?is so where can i connect the output of my circuit to the input of this circuit? TY
Don
Time Delay Relay
Saturday, January 01, 2011 10:44:04 PM
What will happen when 12v is reversed? 555 will fry. Put a 1n4004 in series if that helps. If you want it to work with reverse or forward polarity, put a full wave rectifier on it... reverse or parallel it will function.
Lagarba
Time Delay Relay
Friday, December 10, 2010 8:33:42 AM
What happens when the polarity of 12V dc Power supply is accidentally reversed? Which components will be damaged and need to be replaced?
Robert
Time Delay Relay
Saturday, October 30, 2010 1:30:59 AM
I'm looking to adjust the time of the delay to 1-5 minutes. How do I calculate the change required to the capacitor? Do i up this by a factor of 10 to 100 micro-Farads
anonymous
Time Delay Relay
Sunday, September 26, 2010 4:07:59 PM
Hello: i built this circuit and it works just fine once I realized I needed a "trigger" input. I first had a reed relay as an input and the output stayed on all the time. Once I added an edge triggering circuit (two resistors and a capacitor) the out put stayed on for the time interval I wanted. Thanks for posting this circuit. I found it easy to build and exactly what I needed. Richard
Robert
Time Delay Relay
Thursday, April 29, 2010 3:11:35 PM
The 555 can sink or source only 200ma, you may have to put a transistor between output pin 3 and the relay.
anonymous
Time Delay Relay
Friday, April 16, 2010 1:36:53 PM
quote: "hi, i built this circuit it works perfectly when there is no load at the relay, but when i put a load on a relay the circuit works abnormal...pls help me.." maybe the current limit of your power supply is not enough. you can verify this by monitoring the voltage of power supply. decrease on voltage if there is load indicates that the current setting is not enough.
anonymous
Time Delay Relay
Friday, April 16, 2010 1:33:52 PM
quote: "Hello I have build this circuit but the problem is that there is no delay. if its on it will remain ON and does not turn off. Please help Thx and Regards" troubleshoot your circuit. voltage at pin 6 should be rising the minute power is applied. if voltage is not increasing, adjust R1 to a lower value.
anonymous
Time Delay Relay
Friday, April 02, 2010 6:30:55 AM
Sir, What is that 1 Meg 'POT' means ? WHAT IS THE OUTPUT BEING DISPLAYED IN THIS CIRCUIT?please reply sir.
Waqas
Time Delay Relay
Tuesday, August 25, 2009 4:52:29 AM
Hey this is a really nice and easy circuit to follow, but i was wondering if this can be applied to a 220v supply?? As i want a delay in my power when the relay detects another power source.
anonymous
Time Delay Relay
Monday, August 17, 2009 6:32:00 AM
hi, i built this circuit it works perfectly when there is no load at the relay, but when i put a load on a relay the circuit works abnormal...pls help me..
AB
Time Delay Relay
Monday, August 10, 2009 11:29:41 PM
I have the same problem as Mohsin - power up and relay turns on and the circuit closes. This occurs without the switch. As soon as power applied relay trips and stays on until power removed. Is there a common error that I might look for in my build?
Mae
Time Delay Relay
Sunday, August 09, 2009 10:55:30 AM
circuit is not working to me :( can anyone tell me where am i making mistake...all components new...
Mohsin
Time Delay Relay
Monday, June 08, 2009 11:54:05 PM
Hello I have build this circuit but the problem is that there is no delay. if its on it will remain ON and does not turn off. Please help Thx and Regards
WillyAG
Time Delay Relay
Saturday, June 06, 2009 5:58:27 PM
For timed relay action when the entire circuit is powered up, I put a capacitor (10uf) in place of the switch. On power up, the relay swirtches on for 10 seconds then off for as long as the circuit has power. Thanks for the info, the circuit you designed works perfectly. The fact that you would spend the time helping others is what's really good about the Internet.
Graham
Time Delay Relay
Saturday, May 02, 2009 1:28:56 AM
Hi All, How can i build a timer relay that will run for a prox 8min and then switch itself off. Then switch itself on once a button is pushed running the 8min timer again? This is a solar powered project that charges a batt and the batt will run a screen. Outdoors. Cheers in advance..
tim
Time Delay Relay
Monday, April 27, 2009 9:24:07 AM
hi sir, i'm an electronics student, my cousin and i are planning to make an automobile's horn with time delay, does this circuit work with it? thanks.
Nicolai
Time Delay Relay
Friday, April 17, 2009 2:55:36 PM
Hi I build up this circuit and done a PCB design of it too and works me perfectly. I want to know a brief description of each component what is doing. My timer operates between 0 to 50seconds beacuse I changed the value of R1 and C1. I wish to hear from you thankyou. Regards Nicolai
priyanka
Time Delay Relay
Thursday, April 02, 2009 6:00:17 AM
Dear Sir, Is there any variations occurs in turn time delay, when we extend weightiest slowly i.e. form 4000 to 16000 ? Means when we measure turn on time delay with the help of oscilloscope, Is waveform diagram same for all model or they differ in their AC-DC slpoes?
Andy
Time Delay Relay
Wednesday, March 25, 2009 9:53:05 PM
Hi There, I live in a circa 1989 house that has a time-delay relay box. I'm not really sure why it's there, what the purpose is and if it's in good working order or not. I am not electrically inclined, but do know that it makes an almost continuous buzzing noise that isn't very loud, but definitely noticeable. Any hints you might be able to offer me? Thanks in advance!
Ricky
Time Delay Relay
Thursday, March 19, 2009 1:51:43 AM
The time you can count with this formula: T(s) = 1.1 * R1 * C1
Julian
Time Delay Relay
Wednesday, February 04, 2009 4:16:54 AM
Hi, What NPN transistor is needed in order to allow this circuit to be activated by the rain detector circuit on this website?
George Ndemwa
Time Delay Relay
Monday, December 08, 2008 8:32:57 AM
Am looking for a time delay relay that is energized by a small DC input (12V) and changes its normal state (NO) to the other state after the preset time is reached but remains at its normal state if a second DC input is fed before preset time is reached at the same time reseting the time to zero en counter stops.
Samer
Time Delay Relay
Monday, December 01, 2008 5:21:08 PM
Dear Sir Where can I add a resistance to chose the time between 0 to 9 second ? What do I need to change to make the circuit work with 24V DC? May I know the line , in and out and what the current value. To be connected to 24V pump so the pump will work for the range 0 -9 second and stop Thanks Samer
wapth
Time Delay Relay
Tuesday, November 18, 2008 5:23:26 AM
I need a relay timer to switch off after 6 hours. Basically I want to add in my battery charger.
Den
Time Delay Relay
Sunday, November 09, 2008 2:21:57 PM
I'm looking for a time delay relay that will send 120v AC for a duration of 3 seconds every 30 seconds. Anyone have any ideas? This is to run the auger on my corn stove.
richard trewin
Time Delay Relay
Monday, October 27, 2008 4:34:57 AM
Hi Guys I need a simple circuit for an adjustable time delay system for classic car windscreen wipers. Limited electronics knowledge but reasonably practical. Can anyone help Thanks Rick
Sasha
Time Delay Relay
Thursday, September 25, 2008 8:25:19 AM
could you please tell me the specific fromula between C1 and R1 for calculating the exact time?
maxolous
Time Delay Relay
Wednesday, September 10, 2008 2:08:29 PM
i have been so interested in this circuit.in a country like mine that in characterised with so much power cut i need i circuit such as this to monitor when public supply as come while using generator.that is for a bell to ring for 2seconds when normally close relay is later open to cut bell
Fernando Perez
Time Delay Relay
Friday, August 29, 2008 3:39:29 AM
i looking for current time relay 0-10 seg
Harish
Time Delay Relay
Sunday, June 29, 2008 6:44:35 AM
Is there any simple way of extending the delay time to 10 mins?
amrida
Time Delay Relay
Saturday, May 31, 2008 2:28:52 PM
How does this time delay relay work? Is anyone who can explain me it's functionality?
Mr Robert Colson
Time Delay Relay
Sunday, May 11, 2008 6:08:13 AM
Dear Sir, Thanks for your time in gettinmg back to me. My Question - Will the relay turn off even if S1 remains closed ? If so, I then assume S1 needs to be opened for a time to enable another timing cycle to potentially begin ? Kind regards Rob rcolson@sky.com
George
Time Delay Relay
Tuesday, May 06, 2008 12:20:16 AM
I need a relay timer to swith on for about 1 minute then off for approximately 1 minute. Have 12 volt battery. Basically I want to reverse the polarity from the battery to 2 probes every 60 seconds (approx). Can you please help.
Josh
Time Delay Relay
Wednesday, April 30, 2008 10:05:03 PM
I need a circuit that, once power is removed delays for 3 seconds then applys power to a relay for 3-4 seconds then turns off. Can anyone help
Guillaume du Toit
Time Delay Relay
Tuesday, April 29, 2008 9:43:19 AM
Could you please tell me how to adjust the time to 10 or more minutes and if I can make a repetitive timer that can switch on and off in 'n cycle.
anonymous
Time Delay Relay
Thursday, April 24, 2008 4:29:26 PM
this is a great page because it hlep my to anderstand beter the time delays
Tawong
Time Delay Relay
Saturday, April 12, 2008 5:07:18 AM
time delay circuits should be triggered once voltage gets in, but there are cases where the voltage comes in as pulses before stabilizing.typical example is the dark detector circuits.
R.Thangaraj
Time Delay Relay
Tuesday, April 08, 2008 9:48:56 AM
in this relay if i want adjust up to 10mints what i want to do
Markymous
Time Delay Relay
Saturday, March 15, 2008 6:37:30 PM
I need a waterpoof time delay that is 12vdc and will allow 15 seconds before a 2 amp pump will come on.
S.T.RAHMAN
Time Delay Relay
Thursday, March 13, 2008 5:22:10 PM
We are looking time delay relay 0 to 10 second kindly send your same or replace with complete details, quote your best price fob. we will appreciate your quick response, Qty around 100 pcs. regards. S.T.Rahman Marketing manager Makman Trading Est p.o. box : 8 Riyadh : 11371 Saudi Arabia. Tel : +966 01 4726600 Fax : +966 01 2791079
wasif waheed
Time Delay Relay
Thursday, March 13, 2008 7:15:29 AM
How much time a "time delay relay" can delay.
wee hao
Time Delay Relay
Friday, February 29, 2008 2:43:40 AM
please help my project's deadline are coming and i still not sure how to make a 24v output timer of 10 seconds 3mA please help
wee hao
Time Delay Relay
Wednesday, February 27, 2008 12:08:24 AM
hi i need a 24V output timer thats stays for 20 seconds or adjustable. i need the schmatic and components.. please help.....
wee hao
Time Delay Relay
Wednesday, February 27, 2008 12:06:02 AM
i need a timerboard relays thats gives an output of 24v. 3mA i m not sure but output will on for 20 seconds and shut off power after that automatically. i don't know what components and circuits to use. can u help?? i know it needs a regulator rectifier transistor or delay but i dont know where to start. please help
juma
Time Delay Relay
Sunday, February 24, 2008 6:02:35 PM
Would this circuit work as car flasher?The car battery is 12V,so I wonder about the 9V relay. Or, would you give me the circuit /diagram for the car flasher I mentioned?
saif
Time Delay Relay
Wednesday, January 09, 2008 8:07:58 AM
respected sir' I need an expert help to make a repetitive timer to be 10 minute on and 60 minutes off. cycle
anonymous
Time Delay Relay
Monday, January 07, 2008 2:55:03 PM
we are looking time delay relay ( drop out time relay (time delay 0 to 10 second. kindly send ( our e.mail address e.mail makman_trading_sa@yahoo.com
realbill
Time Delay Relay
Friday, November 16, 2007 5:50:58 PM
I need a time delay relay to come on at dalight useing perhaps a photo-transistor, anda 555 timer.
anonymous
Time Delay Relay
Tuesday, November 13, 2007 11:34:51 AM
I would like to build a timer and relay to activate 3v for 90 seconds. what would the diagram look like and what parts do I need?
james
Time Delay Relay
Wednesday, November 07, 2007 3:57:59 AM
would you give me the pictures and more information on your time delay relay for my reference ,I have interest into the kind of products
anonymous
Time Delay Relay
Sunday, October 28, 2007 8:20:38 AM
Would a time delay circuit be suitable for alarms? Also, would this circuit be able to work as an alarm without the relay? If so, cn you tell me how?
Enoka Taumaanonymous
Time Delay Relay
Wednesday, October 17, 2007 10:14:33 PM
request if you could sent a full function of this time delay relay to relate to control a motor output 24V
Kumar Siriwardenaymous
Time Delay Relay
Monday, October 15, 2007 3:10:55 AM
Iwant to know the connections for a Toyota wiper timer relay.There are 4 pins in that relay. Can you explain the connections & how to identify them with aMultimeter or any ohher way. Thank you
W.S.Jin
Time Delay Relay
Sunday, October 14, 2007 9:58:46 PM
Would you please ley me know How to change this Time delay-off circuit to Time delay-on ?
Reg
Time Delay Relay
Tuesday, October 02, 2007 10:44:22 PM
Would you please tell me how to wire-up each of the three (3) legs of the 1m Pot when designing the circuit board?,
nSteveonymous
Time Delay Relay
Sunday, September 30, 2007 8:03:41 PM
Hi, I would like to make the indicators on my bike work without me holding the button down all the time. I'd like to press the button and have the indicators flash for about 30 seconds then switch off. Is there a relay or switch unit I can buy to do this? Cheers Steve
ochaz
Time Delay Relay
Friday, September 28, 2007 3:57:20 AM
how can i use this circuit in 6V supply?
Modassar
Minimum Time Delay
Thursday, September 13, 2007 9:38:41 PM
can u please tell me how can i use this circuit with 5 volts adn please also tell me what is the minimum time this circuit could be set can it be 0.1 sec?
faruk gele
Time Delay Relay 11
Thursday, August 09, 2007 8:21:33 AM
hello iam a student desperatly in need of assistance in respect of this time delay relay 11. i have already finish the construction as specified in the circiut diagram but the circiut is not perfurming.
mikey
ramp circuit
Tuesday, August 07, 2007 9:40:22 PM
Hi, Im looking for a ramping circuit to turn a 30 amp fan ....slooooooowly any one have any thoughts I just need the ramp curcuit and I can add some hexfets or power transistors thanks Mikey
Camil
Voltage Relay
Sunday, July 22, 2007 7:46:09 PM
Hello, I have a question and I'm wondering if you guys could help me out. I want to know what do I need to add to my relay or what kind of relay do I need to turn its self on when voltage is 13Volts and up and to turn its self off when its under the 13V. For example: On the car when its off the voltage is about 12V and when you turn it on the voltage is between 13V and 15V depending on the alternator. This relay that I want to install draws 300mA. So basically when the car is off the ralay will be off and when you start the car I want the relay to turn on as the car will produce more then 12Volts. All help would be greatly appreciated. Thank you, Camil H.
McKlein
Time Delay Relay
Sunday, July 22, 2007 11:19:14 AM
Great post !... Can you help me with my aeroponic project ? I need an expert help to make a repetitive timer to be 3-5 seconds on and 3-60 minutes off. the output of the timer will be connected to an AC switch to turn a water pump on and off. Couldn't find it everywhere on the internet. Please help, a bit desperate here :) Thanks in advance. McKlein
Imrana
I want more detail on a reaction timer
Tuesday, July 17, 2007 5:39:27 AM
Please i want more detail on a reaction timer cos i want do my project on it. Thank Student
anonymous
Time Delay Relay
Thursday, July 05, 2007 4:57:29 PM
Could you please write the formula to change the time?. I would like to make the circuit with a 5 minutes and 10 minutes delay. Thanks in advance
Shahariare
I need 6h Timer relay
Thursday, July 05, 2007 4:00:41 AM
that after 6 Hours it will power off
anonymous
Time Delay Relay
Thursday, May 17, 2007 5:47:03 PM
How can I make a time delay (10 to 20 seconds or so) since the power switch is turned on and a small light goes on using 1.5 volt or 3 volt batteries? Thank you!
mike
Time Delay Relay
Wednesday, May 16, 2007 8:46:09 PM
I was just wondering what the difference between a relay timer and a sequence timer is?...Thanks MIKE
anonymousanonymous
Time Delay RelayTime Delay Relay
Saturday, May 12, 2007 9:18:15 PM
May a time delay light and switch be installed in each roomof the house so that they can be automatically switched on alternately?
FightGlobalCooling
Emmisions testing sucks
Thursday, May 10, 2007 5:43:12 PM
Used this to "stimulate" the check engine light in my FC after haltech install. Now I pass smog one day every other year. Thanks Aaron,
Ben Bailey
Time Delay Relay
Saturday, April 07, 2007 3:26:31 PM
I have used this circuit to control a 12v 10watt halogen lamp in a light house. To simulate the beacon of a light house.
dedrick
Time Delay Relay
Friday, March 23, 2007 12:54:59 PM
what can i do to use a 12V relay instead one of 9V and what type of capacitor/resistor can i use to adjust the time between 30 sec and 1 min? thanks
anonymous
Time Delay Relay
Thursday, March 22, 2007 11:40:27 AM
Tested it, great circuit.
hamada
Time Delay Relay
Thursday, March 15, 2007 5:33:57 PM
please i want acircuit to delay the current flow for one or two second could this one do that.please answer me on my email thank you
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