You can easily pulse an output using Tasker. From an open Workspace you will click + Add Action… to get the Add Action dialog. From there you will select Pulse Relay (channel, duration).
![](https://jnior.com/wp-content/uploads/2022/10/Snag_2253b031.png)
Once the action has been added you will need to configure the correct channel and duration.
![](https://jnior.com/wp-content/uploads/2022/10/Snag_2254ad0f-700x334.png)