gsm module used home appliances control

R

ramesh raju

New Member

• Oct 16, 2011

• #1

give me some idea about tat please......

 

magnatro

New Member

• Oct 17, 2011

• #2

think like this. GSM module at commands>------> USART >---->level converter>-----> MCU (PIC AVR etc) >------> relay driver>------> relay >----> appliance.

 

D

Diver300

Well-Known Member

Most Helpful Member

• Oct 17, 2011

• #3

The scheme is about right, but many GSM modules use low level serial signals, so the level converter isn't needed.

 

R

ramesh raju

New Member

• Oct 19, 2011

• #4

how to limit the back emf effect in that

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Oct 19, 2011

• #5

ramesh raju said:

how to limit the back emf effect in that

Click to expand...

You mean from the relay coil? - if you don't know something as basic as that how can you expect to build anything electronic?.

Just a diode across the coil, look at any circuit.