How can I build a 12V DC motor controller for my fishing pole?

[yrliner]

I have attached a 12v DC electric drill moter to a fishing pole.
I need a 12v dc motor controler or PWM that will allow me to cut the rpm's down from 550 rpm to about 20 to 100 rpm. less then 20 would work better for bottom fishing.
I believe a PWM would work but I am not sure as to a schematic I can use to build one.
Any ideas or input would help. I am not wanting to buy something. I want to build it with my son. it's our project together. thanks for the help. Just F.Y.I we are makeing this so I can go fishing independtly I only have the use of 1 arm.

 

[davenn]

hi there
welcome to PF :)

do some google searching PWM+H-bridge+motor+circuits

you should come up with lots of ideas :)

cheers
Dave

 

[yrliner]

No will not need a H-bridge It is only going to turn 1 way.

 

[milesyoung]

What you want can be done very simple and cheap using a 555 IC, a power transistor and a few passive components. It's probably one of the most well-documented hobby projects around since so many start out building exactly that circuit.

Like davenn suggested, do a Google search for something like "555 pwm motor" - you should find plenty of material.

 

[alphy]

Building a 12V DC motor controller for your fishing pole is definitely a feasible project, and it's great that you and your son are working on it together. In order to achieve your desired RPM range of 20-100, a PWM (Pulse Width Modulation) controller would be the most suitable option. A PWM controller works by rapidly switching the power on and off to the motor, which effectively controls the speed.

To build a PWM controller, you will need a few components such as a MOSFET transistor, a potentiometer, a diode, and some resistors and capacitors. You can find many schematics and tutorials online for building a simple PWM controller, and you can also modify them to suit your specific needs. It's important to note that the specific values of the components will depend on the specifications of your motor and the desired RPM range, so make sure to do some research and calculations before building.

Additionally, it's important to ensure that the controller can handle the current and voltage requirements of your motor. You may need to use a heat sink or a fan to prevent overheating, especially if you plan to use the motor for extended periods of time.

Overall, building a 12V DC motor controller for your fishing pole can be a fun and educational project for you and your son. Just make sure to do thorough research and take necessary safety precautions while building and using the controller. Happy fishing!