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  1. mingki

    Boat steering

    Yes, that's why I will use this waterproof case for my battery packs. I will use 48VDC(12V battery x 4pcs) battery for each motor as below. You are right. I have been searching for water jet but it's so hard to find one with compact size and affordable price. They are just so expensive. I am...
  2. mingki

    Boat steering

    That's a good item. Thank you. I also wanted to use some water jet but I couldn't find any manufacturer. Do you know some water jet product out there in the market that can be applied to my project?
  3. mingki

    Boat steering

    That's right, I need to protect the prop from debris and objects flowing with water. To eliminate prop walk, should I rotate each motor like this to keep the boat going straight?
  4. mingki

    Boat steering

    That's a good point. Yes, there is a great hazard of propeller being a damaging tool. I have been thinking about this for a while and the only solution for this is putting indications on the boat and also use this drone speaker so that the operator could tell the passengers not to come closer...
  5. mingki

    Boat steering

    I see, then could you recommend me some other boat that is feasible for this project? My plan is to develop some RC boat for rescue activity that human can ride or hang on to. This is a preparation for upcoming flood disasters in the summer because there are so many unusual heavy rains these...
  6. mingki

    Boat steering

    Hi thank you so much for your answers. No, I am not dead yet cause I haven't tried a test yet. So, it seems that the design would be feasible for propulsion and steering if I reinforce the boat structure properly. Now, I understand. The propulsion system will enable me to push the boat...
  7. mingki

    Boat steering

    Hi I am installing these motors to the backside of my boat for propulsion and also for steering using dual motor controller. My boat is this. The steering mechanism is like this. The motors are all fixed on my boat and I want to steer the boat by proportionally controlling each motors...
  8. mingki

    Does anyone know how this golf cart

    Does anyone know how this golf cart follows its user? (6) CaddyTrek R3 Smart Robotic Electric Golf Cart Bag Caddy with Smart Vision AI Technology - YouTube This is so interesting. I wonder how this thing follows its user based on what tracking reference and what type of vision camera is used...
  9. mingki

    Remote control carrier tracker following

    Thank you very much Dave. That's just what I need. I will study more about that items. Thank you.
  10. mingki

    Remote control carrier tracker following

    The minimum distance is 1m and the maximum distance is hopefully 10m. Less than 10m is also fine. For the accuracy, i don't have a specific target in mind. As long as my electric cart follows me at walking speed (3.5km/h ~ 5km/h), I would be happy. Thank you.
  11. mingki

    Remote control carrier tracker following

    Hi I need to make this electric cart to follow me around at a certain distance which could be adjusted. https://youtu.be/93zouLEdgRQ The video shows remotely controlled electric cart and I want this cart to follow me like the one in the picture below. The robot follows the wearable tracker...
  12. mingki

    How to protect a motor controller from the noise coming out of relay

    Hi, I am testing my dual motor controller with two BLDC motors(48V, 400W) using this schematic. Unfortunately, I am having some electric noise from relays so I loose connection with my motor controller randomly whenever I turn on and off the motor. The connection lose is irregular. Sometimes...
  13. mingki

    Turning on & off a motor using PWM from a remote control.

    Yes, I will test them and come back with results. It will take a couple of weeks to get them since all the parts are not available in my country. Thank you for helping me. I appreciate it.
  14. mingki

    Turning on & off a motor using PWM from a remote control.

    Hi Brian Thank you so much. ok, I will test it by making connections like this.
  15. mingki

    Turning on & off a motor using PWM from a remote control.

    Hi Brian Thank you so much. Could you advise me how to use that relay module with battleswitch? I tried to draw some diagram of connect them by myself but I am really confused on how to connect these two modules together.
  16. mingki

    Turning on & off a motor using PWM from a remote control.

    Thank you Brian for checking my circuit. Well noted. I appreciate it.
  17. mingki

    Turning on & off a motor using PWM from a remote control.

    3DDave Yes, my linear actuator has built in end stop switches to limit its stroke. The double pole and double throw mechanism is for remote control or for battleswitch? I'm sorry for my lack of intelligence in electronics. Could you please teach me in detail how to control the clock & counter...
  18. mingki

    Turning on & off a motor using PWM from a remote control.

    3DDave Thank you very much for your insight. I will try to test my motor using the battleswitch as you mentioned. I think this thing is just what I need to trigger the on and off function of my motor. My 24VDC motor is a linear motor like this. I need to be able to control the clock & counter...
  19. mingki

    Turning on & off a motor using PWM from a remote control.

    My motor is operated on 24V. Remote controller alone can not power the motor so I came up with a circuit using TIP102 transistor and 1N4001 diode. Could you review my circuit and tell me whether it is...
  20. mingki

    Turning on & off a motor using PWM from a remote control.

    Hi Brian I'm sorry. I forgot to post the link of my remote controllers. I have two remote controls. DS600 (Single Hand Control) https://www.youtube.com/watch?v=92nhXXWZ1RM HT-8A (Both Hands Control) https://www.youtube.com/watch?v=DCF2XxW18Ck&t=6s Since my motor is operated on 24VDC, I should...

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