danielsmusic
New Member
hi all, im back. i decided to come back into electronics, i don't think many will rember me.
but anyway, im making a model boat. a big boat, i have a big motor to put in it, i don't know the total specs of the motor but it is big and fast.
looking at it, it would easily draw about 20A (when starting) so its going to need a good speed controller. i had a look and couldn't afford a controller that ws prebuilt for this current. so i bought a GWS ICS50 speed controller, this can only controll small motors (2A@8-12V). i decided to use this to controll a transisor type circuit that would controll the motor. has anyone got and advice to what transistor to use/circuit for a soft start. i also want somesort of protection device that will activate a relay if the transistor is over-heating. i know how to do this already, but im sure it is easier than im thinking (voltage devider with a thermister, and a op-amp).
sorry, i just realized this is the wrong forum.
but anyway, im making a model boat. a big boat, i have a big motor to put in it, i don't know the total specs of the motor but it is big and fast.
looking at it, it would easily draw about 20A (when starting) so its going to need a good speed controller. i had a look and couldn't afford a controller that ws prebuilt for this current. so i bought a GWS ICS50 speed controller, this can only controll small motors (2A@8-12V). i decided to use this to controll a transisor type circuit that would controll the motor. has anyone got and advice to what transistor to use/circuit for a soft start. i also want somesort of protection device that will activate a relay if the transistor is over-heating. i know how to do this already, but im sure it is easier than im thinking (voltage devider with a thermister, and a op-amp).
sorry, i just realized this is the wrong forum.
Last edited: