Can anyone suggest me a Remote Control Circuit which can operate four
No suggestion of what current may be needed.
No suggestion of whether "remote" means "on a long wire run", "wireless across the room", "wireless across the world" or "from here to Mars".
But you _do_ want us to drop everything we're doing and answer _your_ question.
Hmm.
Have you considered RC car motor controllers? They'll work with radios that are commonly available from your local hobby shop (depending on your locale), they'll drive the motor in both directions, and there's probably ones that'll be happy steering 12V around.
Use a toy R/C car or truck setup. It provides 4 outputs: forward, reverse, left and right. Each of those can be interfaced to drive a motor on/off.
Ed
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