I am using a 5pin 6v relay in an analog circuit application. This is my first time to use a relay. I heard that there is a relay driver. Is it necessary to use a relay driver along with relay. Its a 5 pin relay, 6v And analog application, not a digital. Only 2 transistors included. Automatic street light design using ldr and BC547 transistor. Thanks in advance.
A relay coil just needs some specified current for the relay to turn on. Since the coil resistance is usually well known, this may also be specified as a voltage. As long as you can produce that voltage at that current, you can drive the relay.
The rest of your question makes no sense, so is ignored.