The digital timer allows us to have the cats eat when we eat. They have learned quite quickly that feeding time is when the kibbles hit the dish and no other. In fact, they will sit in front of the feeders and wait. They become rather good at telling time.
This 120V timer is perfect for the Super Feeder. This type of timer is rare with a Minimum switching time of 1 second. It can be programmed for up to 8 "on-off" settings per day, any particular days or all days of the week. It has a self-recharging battery back-up system to protect programming and maintain exact time during power failures or removed from a power outlet for months. It has a manual override button to trigger your Super Feeder for additional portions or to turn on whatever else you want to power. When used with a Super Feeder, this timer can also be programmed to override the Super Feeder's own internal feed timer by using the "seconds" feature to select different portion sizes at different times of day by increasing or decreasing the feed time from the external digital timer. To use this feature, the feeder's own internal feed timing controller has to be set to a longer feed time than the longest "external" digital timer's programmed feed time in seconds, thereby overriding the feeder's controller. You could have one meal in the morning at 30 seconds duration, one at Noon for 15 seconds, another one at 6 PM for 40 seconds, etc... The simplest way is of course to use the feeder's own feed time controller for main daily portions. When the timer is plugged into a live power outlet, a green light is on. When it turns on, a red light also comes on for the duration of the "on" time. IF YOU WOULD LIKE MORE DAILY CYCLES USING A DIGITAL TIMER, CONSIDER THE ACDT-19, but, it will not have "seconds" programming available, only minutes and hours, which is not important anyway if doing same portions all the time.
Video for programming/operation: http://super-feed.com/ACDT-20-Super-Feeder-Digital-Timer.htm
A digital timer is necessary if you want to control the amount of food the animal gets using the on/off settings of the timer. I find that a 7-second setting gives me a bit more than 1 Tablespoonful of food. (That will vary depending upon kibble size.) The video that the company provides makes the task of setting it up fairly straight-forward. That said -- I'd think twice about this if I was technically challenged. If you still have a flip phone because you are intimidated by a smart phone -- I'd think twice about this. On the other hand, you don't have to be an engineer to set this up.