Hi guys. I have two questions related to psr-25 and ssr. Can someone explain to me how the psr-25 voltage regulator works, f.e. using circuit or something. I want to setup a heating element controller using ssr and 555 timer circuit and I was wondering if it's OK to have the timer at 0.5 second or so, maby lower? My controller should not produce surges with the water. And maby one more thing, how low can the timer be so my ssr won't break? Thanks, Winestill.