I'm using a 12-volt DC circuit where the 555 IC puts out 150 milliamps and I need to increase that to 350 to 400 milliamps. Please Supply a simple circuit using the output from the 555 pin and the 12 volt power supply along with a mosfet to get me the 350 milliamps that are going to drive my DC motor which requires 12v and 350 milliamps. I do not wish to use a transistor to boost amperage as heat might be a factor and don't want to use heat sinks to complicate things. The whole project is using a pack of 8 double-a cells. the original circuit can be found on this link however I do not want to use a relay or additional power source.
https://www.homemade-circuits.com/simple-automatic-plant-watering-circuit/
https://www.homemade-circuits.com/simple-automatic-plant-watering-circuit/