I built a wireless ultrasonic water tank meter which is working well, I recently added a relay driver to switch on and off a 24v AC solenoid on my sprinkers. This works but every now and then, when turning off crashes the micro (uno)...
I have researched and now know I need a snubber or a a triac based driver.
Since my relay driver is in place already I figured adding a snubber would be easiest but not sure about the values to use? Has anyone done this before?