I would like to make a sign that blinks “SLOW DOWN” if vehicles are speeding. Can I do that with the PNL10?

The PNL10 can turn-on (and optionally blink) an external LED string (arranged to read a message of your choice) above a user-set speed. This requires a simple LED only board connected to the expansion connector on the back of the PNL10. We invite you to review appendix “B” in the User Manual for details and a suggested schematic.