Hi Anthony, firstly welcome to the community 
It is really up to you but you could have a few lights or switches that you would like to operate at once. You may need a light and a fan on at the same time. It is why we love HA you get to choose. 
Hi Blacky, is there a possibility to build something to have either different timers to choose from and one to control that entity completely manual?
Would be nice for my water-tab using it in different situations, fill my pond for xx mins. Or have it run till I stop it for continually watering.
Sorry for my first response I deleted that, this is the right…
Yes, could try doing a card with for example 4 switches. first 10 min, second 30 min, then 1 hour and on always on.
I will PM you.
Updated Feature 
HA Restart
Updated the HA restart to only trigger the automation if entities are ON. This prevents the automation running for no reason when HA is restarted. All the entities will still turn OFF automatically starting from the restart start point to the end of the pre-set time period.
Enjoy
Blacky 
BLUEPRINT CODE UPDATE 
Just a heads up if your still on a old HA version before you update.
From time to time Home Assistant update their code structure and the old code will become “DEPRECATED” stopping / breaking automations from working. It effected this blueprint about 4 to 6 months ago. I wanted to wait some time so everyone had a chance to update their HA version before updating the code as older HA versions can not run the new code. This blueprint has now been updated so it will still operate once HA remove the “DEPRECATED” code from their system. 
If you like this blueprint? Consider hitting the 
button in the top post
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Enjoy
Blacky
Is it possible to make this blueprint universal so it could also turn off a device for a defined time and then turn back on after the time has elapsed? (Selectable action to temporarily turn on or off).
Also, it was not clear to me that this ran EVERY TIME an entity was turned on. I like the ability to turn turn on (or hopefully off) a device for a pre-defined time but can this also be made to only run 1 time (like a 1-shot) in addition to every time like it currently does? There are many times where I have a certain automation but want to temporarily override a state but allow the existing automation to take control again. With this setup, if my existing automation turns on a device that has this blueprint applied, it will turn off every time going forward based on the time defined in the blueprint.
Yes this is possible but maybe my 
Timer Relay - Run ON Timer will suit you better. You can choose the state ON or OFF of an entity to then turn ON another entity.
Yes it is a run on timer, so when you turn it ON the timer will turn it OFF.
I am not realy sure what you are trying to achieve. When will it know when to do the “1-shot”. Have a look at my other blueprint and let me know if this works for you.
The other one is close but still makes this automatic. Here’s what I’m attempting to do. I can create individual automations but am hoping I won’t have to:
I have a number of things that come on upon home occupancy such as lamps, fans, etc. for the house and basement. There are times that I’m working from home and, with no one else home, I don’t need much of this on. I’m trying to find a way to turn off these selected items for a selectable time until the rest of the family comes home and they the come back on. I could active this from a push button or Apple Watch complication, for example but I don’t want these turning off every time I turn them on, only when I manually active the action. is this possible?
Have you considered using presence detection (person) so when those people are home then it will enable the items you would like. If you are home then only some items are enabled and the other items are not. My sensor light blueprint will do this but not sure if that works for you.
@Blacky thanks for the blueprint. I’ve changed it a bit and added climate entity, because wanted to control floor heating with it. Here is the updated code: run-on-timer.yaml · GitHub
Hi, my entity is not working properly, due to some issue in the Time Configuration
Would appreciate if anyone could help me
- In condition I want to add – time 2 to 4 am and 2 to 4 pm – switch.toggle
- In the If statement I want to add - time after 4 am to 2 pm & 5pm to 1 am — if the entity state “ON” – ACTION “switch.off”
The below code is not working correctly
trigger:
- platform: state
entity_id:
- binary_sensor.input_2
id: "on"
- platform: state
entity_id:
- binary_sensor.input_2
id: "off"
condition:
- condition: time
after: "18:40:00"
enabled: true
- condition: or
conditions:
- condition: time
after: "06:40:00"
action:
- service: switch.toggle
entity_id: switch.e16s_output2
- if:
- condition: state
state: "on"
entity_id: switch.e16s_output2
- condition: time
after: "08:35:00"
- condition: or
conditions:
- condition: time
after: "20:54:00"
then:
- service: switch.turn_off
entity_id: switch.e16s_output2
mode: single
I am using this to control two e-bike battery chargers. The chargers are plugged into Sonoff S31 plugs running Tasmota and connected to HA using MQTT using the Tasmota add on. I added the switch names as the entities to the automation created with this blueprint. I set the off time to 2 hours. I created an entity list dashboard that has switches for the two entities that control the plugs and one for this automation. If this automation is turned on and I turn on one of the plugs it will turn off the automation in 2 hours. That lets me charge the batteries for a fixed amount of time when they are low. If I want to fully charge them I simply turn off the automation and turn on the chargers. It works perfectly! Thanks.
New Feature 
Timer Helper - Added a timer helper option. By adding a timer helper it will survive a Home Assistant restart and resume its time. It also allows you to display the time in a dashboard.
Note - When creating your timer helper, make sure you tick the box to restore so it will survive a HA restart and don’t set any time in the timer helper duration, use the time settings in the automation.
If you like this blueprint? Consider hitting the button in the top post
If you like my blueprints, and would like to show your support or just say thank you? Click Here
Enjoy
Blacky
Hi, just trying to understand how this works, if I want multiple separate devices to turn off on a timer, do I need to create an automation from this blueprint for each?
Like, if I have a bunch of light around the house that I want to turn off automatically after x min of being turned on, is it not possible with a single automation?
I am on the next version 1.6 and I forgot to push it out. It has been tweaked a bit but If you would like each light to be able to turn OFF after X amount of time once it has been turned ON then yes. The new version will allow you to have multiple entities and you can just turn one ON or any of them ON but the time delay will be from the last one that was turned ON. 1.5 will turn them all ON and OFF together but 1.6 will give you an option to turn them ON and OFF together or turn them ON individually but they will all go OFF together. That may work for you
I will have to look at my version again to make sure it is ready to be released and then I will push it out. I try and get this done tomorrow.
Blacky 
1 Like
New Feature
Trigger Entity State - Added a trigger entity state option. You can now choose ON or OFF as the trigger state.
Trigger Entity Sync - Added a trigger entity sync option. This is now an option.
If you like this blueprint? Consider hitting the button in the top post
If you like my blueprints, and would like to show your support or just say thank you? Click Here
Enjoy
Blacky
1 Like
I would like to be able to set the time for the timer using some control in the UI. Right now I have the timer hard coded to leave the device on for a fixed number of hours. I am using it to charge an e-bike battery and would like to be able to change the number of hours from a UI control instead of having to edit the instance of the blueprint.
I created an input_number in the UI and have a slider that spans the range of values that I’d like to use to set the number of hours that the timer is on. Is there a way to use this with this blueprint? I’m a bit of a HA newbie. I’ve done some reading and it seems I may need to use a helper and a variable plus a template, but I’m not quite sure how to do that. Can I do it without editing this blueprint and just make modifications to the automation that uses the blueprint? Any help would be much appreciated.