OpenSprinkler › Forums › Hardware Questions › Impulse instead of constant 24VAc › Re: Re: Impulse instead of constant 24VAc June 9, 2014 at 5:51 am #27089 RayKeymaster Note that the current opensprinkler firmware allows valve on time down to 1 second. It’s also possible to reduce it to below 1 second by modifying the firmware.
