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http://openenergymonitor.org/emon/buildingblocks/ct-sensors-interface

I have already been through that page. I just wanted to know about the connections of female 3.5 mm jack to the arduino. The product here https://www.sparkfun.com/products/8032 has got 5 pins . Can you please tell me how to interface them with arduino. And will it work with the CT sensors or not. 

Thanks

Sorry I have to say this, but all the information you need is on the page you mention: https://www.sparkfun.com/products/8032

So three suggestions: Read that page, read the data sheet or invest in a multimeter and find out for yourself what the pin connections are.

Whether it is correct for the c.t. you want to use depends on whether the c.t. has a plug fitted, and what type. It is the correct socket for the shop c.t.

You can't just connect a CT to an Arduino and expect it to work.  The CT forms part of a circuit which senses the current and provides a conditioned signal to the processor.  When no current is flowing, the output signal from the sensor circuit needs to sit at the mid-point of the ADC's range.  In isolation, a CT can't perform that role.

The physical connection between the CT and the board (whether emonTx, emonTx Shield, or anything else) does not matter.  The CT has two 'active' connections between which a small signal is generated when current flows.  Those two points need to be connected to the rest of the current sensor's circuit.    For convenience, the emonTx and emonTx Shield each have several 3.5 mm sockets into which standard CT jacks plug can be fitted.  But any other means of connection will work too.

In my original Mk2 Router rig, the wires from my CT were soldered to suitable bits of cable and then plugged into a breadboard where the rest of the sensor's circuitry was located.   They were not plugged directly into the Arduino.

Thank you sir for the helpful article.  I get what you are saying. I just wanted to know on how to connect the 4 pins of the female 3.5mm jack that will be further connected to the network of resistors and capacitors for conditioning on the breadboard.So I just wanted to know that how to connect the pins 2 & 3 which correspond to the left channel for stereo audio, while pins 4 & 5 which correspond to the right channel further onto the board and which satisfies the diagram on this page .

http://openenergymonitor.org/emon/buildingblocks/ct-sensors-interface

Thanks alot for the help.

There are two ways to solve your problem:

1. The diagram on the socket data sheet shows the pin numbers, and if you look at the circuit diagram for the emonTx or the emonTx Shield, you can see the wiring of a standard socket with slightly fewer pins. Forget "stereo" "left" and "right" - those names are not relevant here.

2. You plug the c.t. into the socket and you use your multimeter to identify which pins the c.t. winding appears on.

Thank you so much for the help . I got that after looking in the schematic files of the emonTx shield.