Using FrameNinja you can create timers in OBS text sources. So you can use it to create automated timers, like this:
Step 1. Chain with timer
Go to Chains section and click on the Plus Button. Create Start Timer command
You will see this form
"Timer Name" is used when you want to stop timer at some point. You can skip this field if you do not need it, but we recommend adding it anyway.
"Time (in minutes)" specifies how many minutes timer will work. Select any OBS text source in Output Source field and FrameNinja will insert remaining time in it.
Save your chain and run it. Immediately after starting the timer will start counting down.
Since we have variables feature, you can specify timer time before chain call. Click on the Plus Button next to the "Variables" to create a new one. Select String type with default value 10.
Now you can see variable with it's paste code.
Paste it into Time field of Start Timer command
After save, you will be asked for time before chain call