hiu can use the 2.5v to drive | Projects › Projects › how to convert frm 2.5V to exact 5V? › hiu can use the 2.5v to drive June 15, 2011 at 1:30 am #6345 khader pashaParticipant hi u can use the 2.5v to drive a transistor(npn), give 5v supply to its collector and connect the relay coil to its emitter. u will be able to switch the relay.
