For a workshop, we built an rc car. it ran great. but it was basic. there's supposed to be a competition for all the rc cars. We thought we could make it faster. so, i stupidly went to gemini and asked how to make it faster and from that suggestion, bought the tb6612nfg driver and n20 12v 500 rpm motors (2), and some polulu tires. welp, upon receiving them i realized these are not for a 1 kg rc car. now here's what i have:
. uno.
. 4 18650 cells
. 4 yellow TT motors (12v 300-400 RPM)
. a L298N( i can get 2)
. standard yellow wheels.
. A buck converter.
. HC-05 bluetooth module
. 2 of the n20s
. tb6612nfg
please help me salvage this. what do i do?
Also, please feel free to shame me for relying on AI.
Please put some number on fast! How fast DID the car go and how FAST does it go after your changes?
No shame, but please explain the problem. You have ALL the stuff and ALL the information, we on the forum have no information. Why didn’t your change work?
That is an obsolete part that loves to burn battery energy as heat! I recommend you get a device that has MOSFET outputs. Polo is often recommend as a source. By replacing that part you will get about 3V more on the motor terminals.
I have no idea what the car looks like or what hardware is involved. @Paul_KD7HB asked for more information, the same for me. Also links to technical information on the parts you have such as the motors, converter, etc. . You show a tb6612nfg, that is for a brushed motor, what type of motor is that.
What control methods in a motor controller determine "brushed" versus "brushless" motor driver? I have a commercial kit-rc car with TT (brushed DC) motors and the TB6612FNG.
The Toshiba datasheet does not plainly say TB6612FNG is for one or the other.
Thank you.
That is easy, simply read the data sheet, On many it is probably on the front pages many times just below the part number. In this case; but Toshiba did not state directly what it is for. The real difference is in the motor design and construction.
What It Can Drive
- 1 brushed DC motor (full H-bridge)
- 2 brushed DC motors (one per channel)
- Or 1 stepper motor (using both bridges)
It drives motors with:
- 2 wires
- No Hall sensors
- No electronic commutation required
Brushless drivers typically have:
- Phase control inputs
- Hall sensor inputs
- Current sense inputs
- Sometimes built-in commutation logic
- The TB6612FNG has none of that
This can be easily found looking at the block diagrams on the data sheet. A basic knowledge of motors is required to comprehend this.
The TB6612FNG is for the brushed motor, it has 2 1/2 bridges so two motors single direction or 1 motor two directions. The L298 is a Dual full-bridge driver. The TB6612FNG would be the better choice, depending on the motor current. It will give you about 3 more volts on the motor leads so more RPM and Torque.
very sorry for the late reply.
before it ran about 0.3m/s ( judging from videos)
i have not made the modifcations yet. but here are my concerns:
- the n20 motors have little torque compared to the tt ones
- tb 6612 has a 1.2A stable and 3.2A peak limit. which we might cross in case of a bump
- my n20s have 2 leads. so,that means it probably is unbrushed.
now i have some ideas. - make it light. use 2s and crank voltage with buck converter.
- glue big wheels on the n20 motors.
please suggest if the ideas are good or not.
again,very sorry for the late reply.
2 leads is probably brushed.
oh thanks. any other suggestions?
won't the tb6612 get fried? 1. tb 6612 has a 1.2A stable and 3.2A peak limit. which we might cross in case of a bump. i fear so.
also, i answered some of @Paul_KD7HB questions. i have not made the modifications yet so i can't say.
also, which technical specs do you require?
just found out my buck converter is step down. so, this idea is done.
thanks
What you are saying is similar to saying it is a yellow car and I need a replacement thingy. Tell me what that is and what it is capable of.
Is this the motor? Amazon.com: DiGiYes 4Pcs DC Electric Motor 3V-12V Dual Shaft Ratio 1:48 Geared TT Motor Magnetic Gearbox Engine for DIY Smart Car Robot Toys : Toys & Games
According to its data it developes 2 Horsepower! Do not beleive it, 2 Horsepower at 12V requires over 125 amps. Maybe it is this one? TT Motor Yellow Geared DC Motor - Einstronic Enterprise
At this point without additional information The best I can do is say Good Luck!
Hi, @haatqq1
Welcome to the forum.
n20 motor googles to this.
https://www.makerstore.com.au/product/elec-motor-n20-6v-100rpm-v2/
https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum
Tom.... 
