I'm so glad I found you on RU-vid. I'm in my 50's and had to put my programming and robotics interests on the back burner for too many years to be able to recollect the technique specifics. You're a life saver; particularly as I'm trying to pivot in my career. Your tone, pace and thoroughness are perfect. I just can't overemphasize how grateful I am to find your channel and for what an outstanding job you do. ✌
All he says is use mosfet transistors, they are faster. Programming these logic control board, i do suggest, use LEGO mindstorms first, before you start coding these. If your good enough, use his scripts!
i think i found workbotshop about 2years ago. I would like to second your comment. Busy working & time goes by fast. I'm over half a century yrs old and still learning. Last, I would like to thank Mr. WorkBotShop a lot too.
Love your videos. This particular one is close to my heart. Arduino, Robots, and the motor controller I just learned of. I think one of the best parts of your videos is your wiring diagrams. So easy to follow. Thank You, Sir! Interesting is the effect of different frequencies and that the Arduino can actually deliver them. What a difference in current draw. Batteries will last MUCH longer. Nice.
This video was so incredibly helpful. I especially liked those camera switches very professional. Thanks for all the effort you put into this will be watching and learning from all your videos.
Using a ramp with a change in slope by measured degrees would be a more accurate way to determine efficient torque versus frequency distortion. You'd need to secure that load and use higher traction wheels though. Great video and in depth knowledge. I'm completely new to this and I appreciate your simplified and detailed tutorials.
At last I found someone knowing what he is saying. Just for kicks I measured my Hitachi battery powered hand drill, starting current with no load reached peaks in the range10-15A, when loaded 30-35A. Good job!
I know this video is over three years old. I keep referring back to it (thanks YT library) to remind me of the importance of clocking, for frequency. Thank you.
BTW: I see eBayers selling Wheel Chair motors without wheels. I found that Harbor Freight pneumatic wheels with 4 bolt holes line up perfectly, and cost around $5. You should knock out the inside bearing to fit the hub nut, and fill the tire with Fix a Flat or Slime since the valve stem will be on the inside mount side. I think they are the 4-5 in rim, white wheels. The BT-2 45 amp motor controller works on a wheel chair motor. You can get the BT-2 cheap 2 for $15. I bench tested my Wheel chair motor yesterday and it only pulled 10-12 amps under no load so there is plenty of amps left for a load. I believe DWS said the BT-2 were 30 Amps continuous. 45 peak. I just looked on eBay Wheel Chair motor prices have skyrocketed They run from $130 to $200 each. It might be better to look on Craigslist and buy a whole chair for $100-300 from an estate sale. 5 years ago I got 2 eBay motors without wheels for $75. I also had 2 chairs given to me when a friend's mother passed away
I would strongly consider using a preset 555 timer for duty cycle and frequency and a programmable frequency devider to drive the input of an h-bridge. This would of course be beyond the scope of just one video. I would suggest a series of videos carefully planned out with the just the information required to stay on the objective lasting only 10 or 12 minutes each. This would allow noobs the oppertunity to absorb the information without getting intimidated or overwhelmed by the magnitude of the information. It’s easer to remember 12 minutes of information than 35, and sitting through a 10 minute video 3 times is a lot more appealing than a 35 minute video 3 times. If someone is going to leave a dislike or a negative comment. They should at the very least be willing to offer a solution.
Hi Bill - simply brilliant video with excellent graphics etc! You have now prompted me to get into this very interesting area of controlling large gear-motors through an Arduino and will now duplicate your project! Just as an additional thought I think you could produce a graph for each motor (or pairs of) showing motor efficiency compared to PWM vs frequency and current draw. - would be very interesting to see graphically; please let me know what you think? Cheers & thanks from Down Under. PS: just signed up for your News Letter as well.
Amazing informative video! Could you maybe make a video about the esp 32 module? I'm trying to figure out how it's Bluetooth and wifi work and how it can be connected to a smartphone. I would really appreciate it if you could make a video about it. Keep up the great work!
Does the Arduino analog output pulse width return to the factory setting if you write a new sketch? If not, what divider is the default value to reestablish the pulse width frequency?
I like your channel. I'm poor so I can't afford to throw stuff out. My portable swamp cooler is getting electronic components added to maximize the cooling with little power. I was hoping to put a new motor but the machine has a custom motor. So I need to get a better board built. Again thank you.
Your videos are absolutely incredible and really informative.... Thank you!! Any chance you could do this tutorial on the ESP 32 board still using the Cytron MD10C?
Three questions: 1) Are those DC motors brushed or brushless ? 2) Is the Cytron controller limited to either brushed or brushless motors ? 3) Will the Cytron controller work with permanent magnet DC motors ?
Am I the only one having LCD issues with your sketches. I pasted in your second sketch but found that only the left, up and reset buttons on my shield responded. Thought it must be an LCD shield problem so went and bought another shield. This time the UP button worked once to push PWM from 0 to 1 and then nothing. No other button responded on this second shield apart from reset which occasionally worked. Have tried loading other LCD test sketches and find all the buttons working normally on both shields -just not functioning properly on your sketches. If all had worked it would have been great for me as I am helping my grandson with a project and this was just what we wanted. Anyway thanks for the video..
Great learning video sir. could you please make a video of h bridge operating two large motors. I am working on making controller for electric wheelchair for disabled. your suggestions about that will be warmly welcom. Thanks
Just a correction...The Collector/Emitter junction when in saturation (switched fully on) is only 0.2 volts not 0.7 as stated. Still Mosfet's are still better as stated :)
I am currently trying to build a circuit for my two year olds electric ride on car. The throttle is just a switch on or off and if he’s on slippery ground the drive wheel just spins and he’s not going anywhere. I still want to use the throttle switch but start the drive wheel slower and speed up if the switch is held on longer. Also obviously stop when it’s released lol.
just to let you know your sig gen can put out DC you could have used ch2 to generate 5V direction signal also there is a frequency counter built into the scope.. and should be a counter built into sig gen aswel
The response of the LCD buttons seems totally dependent on the LCD. I have tried many combinations of arduinos with LCDs. Some give no response, some will have one responding button and the best I can come up with was one LCD had all buttons respond except the DOWN. Wonder how Bill got all his LCD buttons to work first time. Same applies to both of Bill's sketches.
I am a relatively new viewer to your channel. I am enjoying your teaching style, the articles, and your very informative web site. I am staying current with all of your new videos while going back and looking at older ones. Will you be combining the google ai voice hat with the robot? I noted the hat has the ability to control servos and immediately thought of the recent robot videos. Thanks for your efforts at producing excellent educational videos.
You should check if the fluctuations are real and if they are maybe you should build a low pass PI filter for the power supply, The PWM looks to be interfering with the feedback of the power supply? good work thanks for vids they are very good
Hi, I just want to say thank you for this well-done video I build my watch kinetic charger using your setup,it works just fine and I'm really happy with it .thank you looking forward to build my next project, I love to share a video of my kinetic charger.
probably a noob question but I can't get a straight forward answer from Google. Will this work with servo motors? Do servo motors need special controllers? I have the PCA 9685 but it can't drive the motors that I have... probably because they draw too much current. (3A max for each of the 6 servos)
I tried to modify this for the MDD10A, but I've been struggling to get things running. May I ask if you will be creating a video on the MDD10A in the future?
Why are you using the while loop directly inside the loop function? The while loop cannot be exited and is currently redundant. I am just curious. I really enjoy your videos and I am looking forward to the robot build series.
@@shaunstewart4064 Right... The one thing that *will* happen though, is that the built-in "serialEvent" method would never get called, as that gets called between iterations of the loop() function. So if you were listening for control data over the UART and wanted to use the serialEvent() function in a non-interrupt type of scenario, you'd be out of luck. It wouldn't get called, because there wouldn't be iterations of the loop() function--only the while(1) loop would be iterating. So you this is an excellent point you raise, and I would skip the while loop in the main event loop function.
It's not redundant. The loop() function does more than just repeating the code and therefore it takes more time for it to restart. A while(1) loop doesn't do the extra stuff and therefore repeats itself much quicker. I recommend testing it yourself with a simple blink sketch or a stopwatch sketch...
I need microsecond control of the pwm pins, so am glad to see this tutorial as I was thinking it was too slow, with the fastest speed of 1 millisecond. With this proposed modification, what is now the fastest switching time of the pwm pins in microseconds? Thanks for a great tutorial on the subject...
Amazing video, very well done sir! I just want to highlight that putting the code into a while(1) into the void loop() statement is not really necessary, since the loop() function is an infinite loop itself, not that this changes the working principle :D
I would be curious if putting capacitors across the motors would change the efficiency by smoothing out the pwm, so it becomes more DC then pulsing DC.
That seems like a good idea. Capacitors across the motors would damp both the peaks and the troughs on the supplied waveform, averaging out the voltage. It should reduce the reactive losses, but I'm not sure how this actually affects the torque delivered by the motor at low speeds. Do DC motors need those full-voltage pulses to maintain torque?
Thank you sir! What a great job! I immediately subscribe to your list waiting fo new excited projects. Thank you again! I learned a lot from you. But, allow me to ask: in what application you made those wonderfull animations? I am planning to make some lessons and those animations are very, very usefull. Greetings!
Sounds like something i need to explore for my Model Train, I keep burning up diodes or drivers now with MOSFETs seems there is hope. Can we get them at the 20VDC range in smaller sizes? I am sharing with my team. Our Control Lead is from S.A. so it takes us some rotations of earth to close our knowledge loop. Thank You So Very Much, Dennis
Fantastic!!! is great!!! my answer is, i need control 4-6 DC motors like this ones at same time, how ca i do?? can i combine the (Adafruit 815 PCA9685 - 16-channel server driver, 12-bit PWM I2C - ) and the Cytron M10 modules??? thanks for all
