I've got this little problem with my formula student project that i need to solve. Basically i'm building a paddle shift system for the car gearbox, and to select gears we have a linear actator that we would like to use. The actuator draws 35A at 12V for a very short period of time, no longer than 1 second at any time. But obviously some kind of switching system is necessary.
Initially i planned on using a relay switch, driven directly from a 555 chip. But i have since decided to use logic gates instead and its output current is not sufficent for the relay, which requires 120mA, therefore an additional switching stage will be needed.
I honestly don't know much about electronics, being a mechanical engineering student. What do you think will be the best way to switch it? Drive the actuator directly through a MOSFET? or use a smaller MOSFET to drive the relay. The datasheets give so much information but i am not sure what i need to look at. I am worried about heat dissipation if using the MOSFET to drive the actuator directly, but on the other hand it seems very redundant to use a MOSFET to switch on the relay.....
Any thoghts?
Initially i planned on using a relay switch, driven directly from a 555 chip. But i have since decided to use logic gates instead and its output current is not sufficent for the relay, which requires 120mA, therefore an additional switching stage will be needed.
I honestly don't know much about electronics, being a mechanical engineering student. What do you think will be the best way to switch it? Drive the actuator directly through a MOSFET? or use a smaller MOSFET to drive the relay. The datasheets give so much information but i am not sure what i need to look at. I am worried about heat dissipation if using the MOSFET to drive the actuator directly, but on the other hand it seems very redundant to use a MOSFET to switch on the relay.....
Any thoghts?