DTMF Based Stator Operation

•DTMF (dual tone multiple frequency ) is a cheap transmission channel for long distance communication.
•It is basically a user friendly technology, it can easily operate by a non technical person.

Why it is needed ?
We know the problem in stator based operation is , when the power supply is shut down it resets and we have to again switch on the stator.In irrigation system the Problem is arising several times and the main problem is the field placed far from the home, we have to switch on the device when the power is shutdown.

Basically a contactor is a 220v powerd coil which is triggered by the input pulse through the start switch. After that the switch is latched.
The stator is the setup for 1phase motor.The Stop switch is a NC(Normally Close) switch and Start switch is a NO(Normally Open) switch.

The Modification Needed For DTMF module

The Block Diagram:-

The data obtained from DTMF module:-

DISADVANTAGE:-

•The DTMF module is continuously on, so that the life time may be decreased.

•Need batteries for uninterruptible power supply for Relay module & DTMF module.

•Need of a Mobile phone or GSM module.