Time Delay Relays Explained - How timing relays work hvacr
video description
Date: 2023-11-17
Related videos
Comments and reviews: 30
Schweizer
one place I ran across an RC timer delay circuit was on an old haunted Otis lift located at an UK motorway service station (the one with the abandoned restaurant on top that looks like two small out-of-proportion towers after the government imposed height restrictions, the circuit was supposed to time how long it keeps the door open but the capacitor was probably leaking which prematurely caused activation of the Door Close circuit, thus when someone presses the hall call button, the lift doors open half way then immediately slams shut, it was an extremely creepy lift! used to give me nightmares of ghosts and demons luring me into that lift then being pinned and injured badly by the force of the slamming doors and then crushed and sliced in half when the lift starts to move, that's when I wake up sweating and heart racing, and yes that lift was all controlled by relay logic you can even hear all the relays clicking, keep pushing any buttons over and over and you will hear the relays click away if you are close enough to the top floor where the machine room is
reply
one place I ran across an RC timer delay circuit was on an old haunted Otis lift located at an UK motorway service station (the one with the abandoned restaurant on top that looks like two small out-of-proportion towers after the government imposed height restrictions, the circuit was supposed to time how long it keeps the door open but the capacitor was probably leaking which prematurely caused activation of the Door Close circuit, thus when someone presses the hall call button, the lift doors open half way then immediately slams shut, it was an extremely creepy lift! used to give me nightmares of ghosts and demons luring me into that lift then being pinned and injured badly by the force of the slamming doors and then crushed and sliced in half when the lift starts to move, that's when I wake up sweating and heart racing, and yes that lift was all controlled by relay logic you can even hear all the relays clicking, keep pushing any buttons over and over and you will hear the relays click away if you are close enough to the top floor where the machine room is
reply
education
I use time delay relays in multiple 12V DC application to prevent voltage spike from damage the sensitive controllers. To do this I've added one to the start of the unit to give it a 10 - 20ms delay before powering the system, that way it give me enough time to make a proper contact before the in rush current comes, other if it's instant the in rush current will cause an ark, which will damage the sensitive unit. The time delay relay has save me multiple units and is adjustable, that way I'd know for sure my circuit will be safe from a in rush spike.
reply
I use time delay relays in multiple 12V DC application to prevent voltage spike from damage the sensitive controllers. To do this I've added one to the start of the unit to give it a 10 - 20ms delay before powering the system, that way it give me enough time to make a proper contact before the in rush current comes, other if it's instant the in rush current will cause an ark, which will damage the sensitive unit. The time delay relay has save me multiple units and is adjustable, that way I'd know for sure my circuit will be safe from a in rush spike.
reply
ElfNet
Time delays are used in modern US locomotives to control the ditch light flasher when the horn button is pressed, these are usually integrated into the whole light system though, however older locomotives owned by shortline railroads retrofitted to FRA guidelines use separate control devices for flashing and delays rather than a whole new system.
Another place where time delays and relays (namely solid state relays) are used is in communications tower beacon flasher circuits.
reply
Time delays are used in modern US locomotives to control the ditch light flasher when the horn button is pressed, these are usually integrated into the whole light system though, however older locomotives owned by shortline railroads retrofitted to FRA guidelines use separate control devices for flashing and delays rather than a whole new system.
Another place where time delays and relays (namely solid state relays) are used is in communications tower beacon flasher circuits.
reply
Embrace
I have a neat device that prevents overloads when using a mitre saw and dust collector (shop vac) at the same time. Since they both have high startup loads, it delays startup of the vac by a second or so which allows the saw current to stabilize before adding another load. Although that's just a feature of the device, the primary purpose being to automatically turn on and off dust collection with the usage of a saw, I think it's a pretty neat use of a time delay relay.
reply
I have a neat device that prevents overloads when using a mitre saw and dust collector (shop vac) at the same time. Since they both have high startup loads, it delays startup of the vac by a second or so which allows the saw current to stabilize before adding another load. Although that's just a feature of the device, the primary purpose being to automatically turn on and off dust collection with the usage of a saw, I think it's a pretty neat use of a time delay relay.
reply
Yottawatts
At 8: 43 would the power source continually charge the capacitor keeping the circuit closed indefinitely? Would there need to be a switch to remove the capacitor from the circuit after it was charged? (e: The path was shown in conventional which threw me off a bit, but there is still a main path through the circuit to charge the capacitor, perhaps it discharges faster than it charges causing voltage to drop below the setpoint needed which would be the timer)
reply
At 8: 43 would the power source continually charge the capacitor keeping the circuit closed indefinitely? Would there need to be a switch to remove the capacitor from the circuit after it was charged? (e: The path was shown in conventional which threw me off a bit, but there is still a main path through the circuit to charge the capacitor, perhaps it discharges faster than it charges causing voltage to drop below the setpoint needed which would be the timer)
reply
AliensStoleMyCow
Sorry for bothering you, but I'm making a bluetooth speaker and I get an annoying pop noise when the bluetooth module turns off. I have a mute function on the amp in the form of 2 pins. I was wondering what's the easiest way to solve this. Do I time delay the bluetooth module to turn off after the amp or rig the power button to tigger the mute switch? I can solder but I'm not an expert so the simplest and cheapest circuit would be best.
reply
Sorry for bothering you, but I'm making a bluetooth speaker and I get an annoying pop noise when the bluetooth module turns off. I have a mute function on the amp in the form of 2 pins. I was wondering what's the easiest way to solve this. Do I time delay the bluetooth module to turn off after the amp or rig the power button to tigger the mute switch? I can solder but I'm not an expert so the simplest and cheapest circuit would be best.
reply
Wendy
I wanna make a toy gun, where I apply a red LED into the barrel, pull the trigger what is a NO button so the gun makes a sound and lights up the LED for like half a second. But I want it semi auto so even if i hold the switch button the RED light will be triggered only for half a second. On top of it is a toy gun, so I'll use 3xAA battery (4. 5V) to power the whole circuit up. It's hard to find anything what fits into that size and does this xD
reply
I wanna make a toy gun, where I apply a red LED into the barrel, pull the trigger what is a NO button so the gun makes a sound and lights up the LED for like half a second. But I want it semi auto so even if i hold the switch button the RED light will be triggered only for half a second. On top of it is a toy gun, so I'll use 3xAA battery (4. 5V) to power the whole circuit up. It's hard to find anything what fits into that size and does this xD
reply
MrRedstone
I've seen these timing relays in school bathrooms. A PIR sensor actuates the relay and it remains on for a while. Eventually it turns the light off. The lights didn't have repeat actuation (meaning the timer will reset every time the PIR senses motion. Instead the timer has to run out before the PIR can detect motion again. I'm pretty sure the relay is built into the PIR sensor module, but it has a loud, distinct click.
reply
I've seen these timing relays in school bathrooms. A PIR sensor actuates the relay and it remains on for a while. Eventually it turns the light off. The lights didn't have repeat actuation (meaning the timer will reset every time the PIR senses motion. Instead the timer has to run out before the PIR can detect motion again. I'm pretty sure the relay is built into the PIR sensor module, but it has a loud, distinct click.
reply
Viktor
I watched the video and I really liked it. :) Just a question. it it possible that the animation at 1: 48 marked wrong? I mean. it seems that the delay off has the delay on's animation. Im asking cuz im about to bulid something which is needs a delayed on function. so after I push the button the electricity should wait at least 1 sec before began to flow. :) Which one do I need then?
reply
I watched the video and I really liked it. :) Just a question. it it possible that the animation at 1: 48 marked wrong? I mean. it seems that the delay off has the delay on's animation. Im asking cuz im about to bulid something which is needs a delayed on function. so after I push the button the electricity should wait at least 1 sec before began to flow. :) Which one do I need then?
reply
Shafayet
I want to make an automated baord where i will test 6 mosfets to check whether they trigger in high current, high voltage and low voltage. I have a device that gets powered up through these mosfets. So for maintaing my device quality i need to check the switches whether they are perfectly triggering or not? I want to run the test for 6 switches together. Is it possible?
reply
I want to make an automated baord where i will test 6 mosfets to check whether they trigger in high current, high voltage and low voltage. I have a device that gets powered up through these mosfets. So for maintaing my device quality i need to check the switches whether they are perfectly triggering or not? I want to run the test for 6 switches together. Is it possible?
reply
Caffeinated
Timing relays are often used in HVAC. Here where I work, I often see them being used for operations like bypassing a freezestat for a short amount of time, the time a unit typically takes to warm up. I also often see them in wired logic for resetting things like freezestats and pressure switches from a command via an operator station.
reply
Timing relays are often used in HVAC. Here where I work, I often see them being used for operations like bypassing a freezestat for a short amount of time, the time a unit typically takes to warm up. I also often see them in wired logic for resetting things like freezestats and pressure switches from a command via an operator station.
reply
David
A company where I worked built a training simulator for a ship console. This required several industrial computers to control the console, the switching power supplies of the computers act as a direct short, momentarily, so a number of delay relays were utilized to sequence the computers startup.
reply
A company where I worked built a training simulator for a ship console. This required several industrial computers to control the console, the switching power supplies of the computers act as a direct short, momentarily, so a number of delay relays were utilized to sequence the computers startup.
reply
Car
I'd like a relay for a security system triggered by an electronic eye. Perhaps a 5 second on delay and then reset after sounding an alarm for 3 minutes or so. I haven't found anything to give me the adjustability desired yet. Thanks for your informative videos!
reply
I'd like a relay for a security system triggered by an electronic eye. Perhaps a 5 second on delay and then reset after sounding an alarm for 3 minutes or so. I haven't found anything to give me the adjustability desired yet. Thanks for your informative videos!
reply
Joshua
I used a time delay relay in my pickup so the auxiliary power stays on for 2 minutes after turning the key off like newer vehicles. I also made it turn the overhead lights and outside lights on when the key is turned off. Works great
reply
I used a time delay relay in my pickup so the auxiliary power stays on for 2 minutes after turning the key off like newer vehicles. I also made it turn the overhead lights and outside lights on when the key is turned off. Works great
reply
Yuhh
Can this setup keep up with rapid fire trigger action? I want to use design for a custom ecu that i can advance and retard spark variably by knob and to also control injector pulse width. Trigger signal comes from crankshaft sensor.
reply
Can this setup keep up with rapid fire trigger action? I want to use design for a custom ecu that i can advance and retard spark variably by knob and to also control injector pulse width. Trigger signal comes from crankshaft sensor.
reply
Rich_Lex
I was a machine setter and our rotary transfer machines had loads of relays. Wurth & Gruffat machines. I was a trainee at the time and didn't know much about them as the only one ever changed was the cycle time relay.
reply
I was a machine setter and our rotary transfer machines had loads of relays. Wurth & Gruffat machines. I was a trainee at the time and didn't know much about them as the only one ever changed was the cycle time relay.
reply
Michael
For my final exam in my journeyman Final exam after six years of studying to get my electrical license! I built a time delay project from start to finish with all the bells and whistles! It worked thank goodness!
reply
For my final exam in my journeyman Final exam after six years of studying to get my electrical license! I built a time delay project from start to finish with all the bells and whistles! It worked thank goodness!
reply
EthanGreen
4: 40 ELEVATORS (I found this out by there is this one room at my school anf in a building when the elevator gets called and stuff there is a lot of clicking noise coming from it and I saw videos about it too)
reply
4: 40 ELEVATORS (I found this out by there is this one room at my school anf in a building when the elevator gets called and stuff there is a lot of clicking noise coming from it and I saw videos about it too)
reply
Gabriel
Thanks for the expanation! Im going to delay the power cut to my car radio after the ignition power is cut. Music can keep playing for 10-15 seconds after shutoff so I can walk away in style.
reply
Thanks for the expanation! Im going to delay the power cut to my car radio after the ignition power is cut. Music can keep playing for 10-15 seconds after shutoff so I can walk away in style.
reply
Wikus
It is used in vehicles as well, for, heater plugs on diesel, Ign-off on vehicle after set time goes to sleep, dash board or acc lighting switches off after set time, & so on
reply
It is used in vehicles as well, for, heater plugs on diesel, Ign-off on vehicle after set time goes to sleep, dash board or acc lighting switches off after set time, & so on
reply
Michael
Spending 3+ hrs troubleshooting a pedestrian gate entry into a residential area just to find the digital time relay reset to 0 and nothing was actually shorting or broken
reply
Spending 3+ hrs troubleshooting a pedestrian gate entry into a residential area just to find the digital time relay reset to 0 and nothing was actually shorting or broken
reply
Serdar
Yes, this principal circuits works for many years. But, calendars show 2022. For digital age, this topic can be achieved simple microcontrollers, such as pic10f200.
reply
Yes, this principal circuits works for many years. But, calendars show 2022. For digital age, this topic can be achieved simple microcontrollers, such as pic10f200.
reply
Sam
I have a time delay relay on my air conditioner blower motor where most people have a board with a relay. I need to find a replacement for it, but it's really old.
reply
I have a time delay relay on my air conditioner blower motor where most people have a board with a relay. I need to find a replacement for it, but it's really old.
reply
Robert
We use these for controlling star/delta starters as well as controlling condensation dumps on compressor intercoolers for how often they open and for how long.
reply
We use these for controlling star/delta starters as well as controlling condensation dumps on compressor intercoolers for how often they open and for how long.
reply
ItalianStallion69
11: 01
In this example, does an increase in capacitance for the capacitor lead to an increased amount of time before the light is electrified?
reply
11: 01
In this example, does an increase in capacitance for the capacitor lead to an increased amount of time before the light is electrified?
reply
James
I have a compressor that Id like to run for a brief period of time, but I dont want to have it powered constantly- I think these would be great for my needs.
reply
I have a compressor that Id like to run for a brief period of time, but I dont want to have it powered constantly- I think these would be great for my needs.
reply
Vittorio
Useful video, Im an engineer in the industrial refrigeration industry and I have seen many of these but Ive never known How these worked si far. Thanks
reply
Useful video, Im an engineer in the industrial refrigeration industry and I have seen many of these but Ive never known How these worked si far. Thanks
reply
James
U said before electricity flows from negative to positive base on electron flow theory but why in your video it still uses conventional flow theory
reply
U said before electricity flows from negative to positive base on electron flow theory but why in your video it still uses conventional flow theory
reply
larrybud
Would like to have seen one more step in the video, showing how the circuit would be set up to automatically toggle between open and closed.
reply
Would like to have seen one more step in the video, showing how the circuit would be set up to automatically toggle between open and closed.
reply
Doug
I would like to delay a to come on after someone breaks into my house to get a good picture of the person is it possible to make one thank you
reply
I would like to delay a to come on after someone breaks into my house to get a good picture of the person is it possible to make one thank you
reply
Add a review, comment
Other channel videos
