Auto lawn mower project

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Auto lawn mower project

Postby ypfong2017 » Wed Mar 20, 2019 9:02 pm

How to use maker uno kit to control a lawn mower? Because lawn mower is too heavy for these small DC motors. And how can I make this kit to control power window motors since it requires higher voltage to work.
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Re: Auto lawn mower project

Postby ober » Thu Mar 21, 2019 8:53 am

ypfong2017 wrote:How to use maker uno kit to control a lawn mower? Because lawn mower is too heavy for these small DC motors. And how can I make this kit to control power window motors since it requires higher voltage to work.


Maker UNO is basically Arduino UNO R3. And Maker UNO is a microcontroller, it does not have the capability to control motor directly (small tiny motor is still fine, but large motor like power window is not possible). So you will need a motor driver.

depending on which power motor you use and how you use it... I would recommend getting motor driver that can support 20A continuous, example MD20A:https://www.cytron.io/p-20amp-6v-30v-dc-motor-driver

Sample connection and sample sketch for Arduino is in the product page.
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Re: Auto lawn mower project

Postby ypfong2017 » Thu Mar 21, 2019 4:42 pm

Is that MD20A motor driver can control 2 power windows simultaneously? And the auto lawn mower will use sonic sensor to sense obstacles, so do I need to buy arduino to control it?
Sorry for asking so much, because I'm a beginner.
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Re: Auto lawn mower project

Postby ober » Fri Mar 22, 2019 10:07 am

MD20A is single channel motor driver, so if you want to control two motor independently, you have to get two motor drivers. But if you want to control two motor with the same speed, direction and start/stop, you can use 1 motor driver and connect the motor in parallel method. Yet, I do not know the reason for that.
BTW, a power window motor can consume ~20A stalled current, so better get higher current motor driver.
Why buy another Arduino to control it since you have Maker UNO?
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Re: Auto lawn mower project

Postby ypfong2017 » Fri Mar 22, 2019 7:04 pm

I didn't have Maker Uno, so I will consider to buy an Arduino. So can u help me to program some codes for my lawn mower? This lawn mower will sense obstacles and changing direction by controlling both rear power window motors, front wheel are free castor wheels.
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Re: Auto lawn mower project

Postby ober » Sat Mar 23, 2019 6:22 am

Oh, you have to try to program it yourself, I cannot do your homework for you, right?

That is the way to learn.
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Re: Auto lawn mower project

Postby ypfong2017 » Tue Apr 02, 2019 9:10 pm

So, now i should buy these item. Could u help me check is there any missing item?
1. MD10C x2
2. breadboard
3. Maker UNO
4. HC-SR04 ultrasonic sensor
5. Some wires??
I already have power window motors and battery (motor battery)
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Re: Auto lawn mower project

Postby ypfong2017 » Tue Apr 02, 2019 9:14 pm

Or i just buy 1 MDD10A instead of buy 2 MD10C
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Re: Auto lawn mower project

Postby ober » Wed Apr 03, 2019 9:27 am

Yup, MDD10A is same as 2 x MD10C :)

And your list is quite complete, but you might need:
- USB microB cable to program Maker UNO and power it.
- Jumper wires for interface all stuff together.
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