replace Relay with Transistors

[canarybird33]

hello
I want replace a Relay with Transistors in this schematic. help me know your ideas about it.

 

[Genovator]

You can try this one....



Here, 'A' is your logic input, and 'B' is the output, to be connected between D3 & R3.
Try to calibrate it as per your circuit. Use any equivalent transistors.