The Fact Lidar veto was flewn and installed to La Palma by Hanspeter and Lubomir in July 2014. It gives 150microsecond long vetos whenever the MAGIC Lidar shoots.

Here is a short summary of the project, from the beginning until the last tests done in the lab:

https://trac.fact-project.org/browser/firmware/FLV/fact_lidar_veto.pdf

All schematics can be found in the svn:

https://trac.fact-project.org/browser/firmware/FLV/