Circuit for digital time control Answered
In my design classroom project, my students want to build a 230V AC electric immersion heater (for heating water in a bucket) whose duration of heating the user should be able to set.
The user should be able to set the ON duration by pressing up- and down- keys (operating 2 switches) to increase or decrease numbers that show on a dual 7-segment display (for showing 1-99).
The numbers that show in the 7-segment display is the time in minutes the heater should stay on for and then switch itself off.
Please guide me to a circuit that would do the above. All our induction cookers, washing machines, etc have this interface, I know this is not something new, but not being an electronics person I don't know where and with what terminology to look.