Hambone said:
Is it possible to detect a particular train passing by a motion sensor with the current Sbrick technology? Ultimately, I want to use a color sensor with trains having a few different colored bricks as unique identifiers to do the job, however, not sure when the ev3 sensor adapter will be available. Has anyone out there tried something similar using the current Sbrick technology?
You can use WeDo 1.0 proximity sensor for that. It has no color sensing unfortunately.
Hambone said:
Is it possible to detect a particular train passing by a motion sensor with the current Sbrick technology? Ultimately, I want to use a color sensor with trains having a few different colored bricks as unique identifiers to do the job, however, not sure when the ev3 sensor adapter will be available. Has anyone out there tried something similar using the current Sbrick technology?
You have a SBRICK plus, the newer version of SBRICK is only capable to work with sensor technic?
Is it possible to detect a particular train passing by a motion sensor with the current Sbrick technology? Ultimately, I want to use a color sensor with trains having a few different colored bricks as unique identifiers to do the job, however, not sure when the ev3 sensor adapter will be available. Has anyone out there tried something similar using the current Sbrick technology?
Judah Herman said:
I’m making an RC tank and I’m trying to control both steering and drive with one joystick. How do I do this?
A joystick has 2 movements, X-Axis and Y-Axis. You are steering with chains? 1 chains has to move slower then the other?
Hello,
is it possible to run two motors on one SBricks simultaneously with a ratio?
I would like to control one motor with a slider and the second motor should run with 60% of the first motor. So if I put the slider to 100%, the first motor should run at full speed, the second one at 60%. If I reduce the slider to 40%, the first motor should run at a speed of 40%, the second at 24%. And if I put the slider on -50%, the first motor should drive backwards at 50% speed, the second one also backwards at 30% speed.
Kind Regards
Ludger
Roman R said:
Hi,
Is it possible to control two SBricks from one Android phone simultaneously? I'm going to motorize one complex model which would require more than four channels one sbrick provides, swo two sbricks would be installed into one model.
Thank you.
Hi,
Yes, of course. :)
Jaap Technic said:
Is it possible to programm the Sbrick some way so i can make warning lights?
Like something i have made on my Mercedes Actros. Just to get rid of the old 9v flashing lights.
Maybe it is possible with an add-in in the app which makes it possible to choose between a set of different light patterns.
you can do this with using "sequences" in profile designer.
Lénárd Pásztor said:
Ilya Rodionov said:
Few days ago I probably forgot the battery box switch open. Yesterday the battery box light did not lighted up. The batteries were fully discharged (I guess because of the sbrick’s Bluetooth operation). I changed the batteries and the battery box led works (I also tested the battery box with a motor – It was OK).
But the sbrick does not respond . No led working and cannot be found from my Android app.
Do you have any idea of what it might be happened or have you faced this before ? is there a possibility of sbrick failure because I forgot it open and worked for many hours ?
Can you send back the SBrick to the following addres? The problem is really interesting, we want to check the hardware. Of course we send you a replacement for free.
Address is:
Tamas Fabian
Kurbli Kft.
1143 Budapest
Gizella ut 42-44
Thanks for your reply, I will send you my sbrik soon and I will wait for a replacement in response
Ilya Rodionov said:
Few days ago I probably forgot the battery box switch open. Yesterday the battery box light did not lighted up. The batteries were fully discharged (I guess because of the sbrick’s Bluetooth operation). I changed the batteries and the battery box led works (I also tested the battery box with a motor – It was OK).
But the sbrick does not respond . No led working and cannot be found from my Android app.
Do you have any idea of what it might be happened or have you faced this before ? is there a possibility of sbrick failure because I forgot it open and worked for many hours ?
Can you send back the SBrick to the following addres? The problem is really interesting, we want to check the hardware. Of course we send you a replacement for free.
Address is:
Tamas Fabian
Kurbli Kft.
1143 Budapest
Gizella ut 42-44
Few days ago I probably forgot the battery box switch open. Yesterday the battery box light did not lighted up. The batteries were fully discharged (I guess because of the sbrick’s Bluetooth operation). I changed the batteries and the battery box led works (I also tested the battery box with a motor – It was OK).
But the sbrick does not respond . No led working and cannot be found from my Android app.
Do you have any idea of what it might be happened or have you faced this before ? is there a possibility of sbrick failure because I forgot it open and worked for many hours ?
Hello Grzegorz,
what do you mean by "frame format"? Could you please re-phrase the question?
Grzegorz Bladocha said:
When connecting with another bluetooth + arduino module to enable channel A which frame format
send?
Hi Derek,
unfortunately you can't combine the current on the different pins. You can feed at most 3 amps into SBrick, othervise you risk melting the plastic around the metal contacts.
It is _technically_ possible to drive SBrick with a LiPo pack, but please only do this if you know what you're doing. There is no fuse in SBrick, and a short circuit with a LiPo pack can drive dozens of amps through it potentially causing fire or even an explosion.
LEGO battery packs come with proper current limiting, LiPo packs usually don't.
Hi,
As the Wiki says,
Absolute maximum continuous current intake from "0" and "9V" pins: 3A Maximum continuous current intake from C1-C2 (using old, or 9V power supplies): 2A
Can I just use 0 and 9V pin to connect power like Li-Po Battery??
Or Connect 4pins will be batter for current intake 3+2A? and cause more powerful output also?
Thanks!
[blockquote]Tamás Fábián said:
First of all, there's no need to worry.
Both the SBrick and the IR receiver drives the motors with PWM or Pulse Width Modulated voltage.
Both devices work by turning the voltage on and off once in about every thousandth of a second, so in each cycle the motor is on for some time, and off for some. The more the motor is on, the more torque and power it can deliver.
Certain parts of a motor can vibrate, and give off a tweeting sound that is the loudest when the motor is driven with 50% duty cycle e.g. it is on for 50% of the time.
We did our best to support LEGO's M motor, and we did great, since we can drive more M motors per channel than the IR can, and the overall current carrying capacity of the SBrick is much higher than the same figure in case of the IR receiver.
This alsomeans that SBrick might turn on the motors more quickly than the IR recever, and therefore the noise might me louder.
Moreover, the IR receiver only applies PWM duty cycles other than 0 and 100% (where there's no noise, but this is the case with SBrick too) if you use it with a 8879 remote.
Additionally, SBrick can utilize 255 PWM levels. The first 20-30 levels are not really useful with PF motors, since they won't even start. At these levels, there is no motor noise to cover the beeping. Once the motors are running at a reasonable rate, their noise usually masks the tweeting.
If you're really annoyed by the noise, I can do a few experiments to either lower the PWM frequency (lower sounds are harder to radiate, and are masked better by the motors), or increase it (with a bit of luck, above the ~20 KHz limit of the human ear). Since this can affect power efficiency (higher the frequency, higher the switching loss, there's more heat), such parameter should be allow tweaking (let the user to override it).
(Hm, I've looked at the code, and the lowest frequency is about 490Hz, the highest is well above 100KHz. DRV8833's rise and fall time is 160 & 180ns, so it might be able to work at that frequency.)
[/blockquote]
I know this is an old topic but I think is possible to do something to improve the "sound problem": take a look to this.
If they did it, so maybe you can do it as well: sounds like a software (firmware) thing! :)
I really hope to see those functionalities implemented in SBrick!!! ^_^
[blockquote]Troy Johnston said: How do I edit my user profile's picture? I know there is supposed to be a button that says "edit profile picture" or something like that, but I can't seem to find it.[/blockquote]
Dear Troy,
There will be a "My profile" menu on top of the page. Click on it.
Than you will see an "Edit my profile" function (under your image.)
And finally find "Edit my Photo", on the right side of the page.
I hope this will help you. :)
If you need any further help, just let us know!
Have a nice day,
Balint
SBrick Team
