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How to control DC motor off and on cycles. Answered

I need to control a radio control boat, 
i want to cycle the motor on and off to extend the life of the batteries
6 - 12 v 40A
my feed would be a normal radio control speed controller

Thanks

Ian 

Discussions

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ian.collins.771

4 years ago

I do radio control boat duration racing, 2 and 4 hour.

with both brushed and brushless motors

to increase the time on each set of cells used i wanted to run the motor full power 7.2v to 11.1 depending on cells used. when running i wanted to power the motor and rest the motor as i don't really think it needs power on it all the time, this would give me longer battery life.

normally use 40ah brushed Esc or 70 ah brushless Esc.

laps of pool in 4 hours about 600 - 700

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iceng

4 years ago

Most controllers are two servos, use one to ruder, and the other for propeller speed ( RPM ) which will moderate your motor current

( probably PWM the most efficient ON / Off mode ) to the prop speed you want.

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iceng

4 years ago

What is a "Normal" controller ??

You don't have the controller in your possession yet.

How many channels 2, 3, 4 ??

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rickharris

4 years ago

I assume you want to pulse the motor in order to reduce current drain -

I assume the motor is driven by some kind of H bridge to give forward and reverse control and the an ESC to give throttle control

Depending on the type of H bridge used they have an enable pin which can be pulsed by a 555 timer to turn the output on and off giving a type of PWM control.

I am afraid that a lot depends on exactly what you have in your control circuit. A circuit diagram would be useful.