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Driving SSR with microcontroller

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Suresh R

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Hi,
I need to drive Solid State Relay(SSR) with the help of microcontroller port pins.
can any one tell me how could i do that so that it is safely driven?
the input to SSR can be (3 to 32)V with input current 1mA and SSR switches 110V dc / 2A.

Can i use a transistor connected to the port pin to drive the SSR? or any better method available?

requiring some suggestions.

Suresh.
 

you can use a npn transistor like the BC547. Connect the base with a small resistor (~1000 ?) to your output pin, connect the emitor to gnd and the collector to the gnd of the SSR. Connect the v+ of the SSR to +5V or something like that. You can limit the current to the SSR by putting a resitor between +5V and the v+ of the solid state.
An other possibility is to use a ULN2003. This ic has 7 transisors + common gnd + base-resistor
 

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