so you will be charging it? Generaly you would have 2 circuts, one for charging, forward, One ofr d

so you will be charging it?
Generaly you would have 2 circuts, one for charging, forward,
One ofr discharging. forward.
Then if you needed to remove one, you wimple subtract the value.

TrueNorthOP•11/16/25, 6:06 AM

@What Happens

CoolBudy1•11/16/25, 8:02 PM

While using a dual h-bridge L298n dc speed controller, if I only want my motors to spin a certain way (one goes forward and the other goes backwards), can I wire a single IN pin to my mcu and then both EN pins? Then connect everything else to ground?

That way I can control the speed of each motor, but the direction will be fixed and tied together? Trying to learn ways to minimize wires going back to my MCU for smaller, simpler projects that dont need full control.

CCoolBudy1 While using a dual h-bridge L298n dc speed controller, if I only want my motors ...

Patrick•11/16/25, 8:16 PM

yes, you should be able to do this

Patrick•11/16/25, 8:17 PM

Control the EN pins separately and have one of the inputs from each motor tied together, with the other 2 connected to GND

PPatrick Control the EN pins separately and have one of the inputs from each motor tied t...

CoolBudy1•11/16/25, 8:30 PM

Oh okay, that makes sense. Appreciate the confirmation

CCoolBudy1 While using a dual h-bridge L298n dc speed controller, if I only want my motors ...

AnonEngineering•11/16/25, 8:35 PM

if you only want one direction ever you can just tie the IN pins to the right logic levels on the L298 and save the mcu pin

daraem•11/16/25, 8:46 PM

Hi, im trying to achieve low frequency sounds on a speaker by using the tone() function. With the speaker I have connected, anything below 250Hz does not sound, and above 250Hz is not low enough. Do I need to use an audio amp? or a different kind of speaker, thx

AnonEngineering•11/16/25, 8:52 PM

probably your speaker, Arduino tonetone goes down to 31Hz as i recall

AAnonEngineering probably your speaker, Arduino `tone` goes down to 31Hz as i recall

daraem•11/16/25, 8:54 PM

ill try differents speakers then thx

AAnonEngineering if you only want one direction ever you can just tie the IN pins to the right lo...

CoolBudy1•11/16/25, 9:02 PM

So something like this? (And I apoligize for the ghost ping. Replied and then realized I forgot to hook up the empty IN pins to ground.

AnonEngineering•11/16/25, 9:03 PM

yes, that way all you need are the common ground and the EN pins running back and forth

CoolBudy1•11/16/25, 9:09 PM

Then to turn on and off, I'd just set EN to zero with pwm. Would using PWM to turn them on and off cause any problems compared to using the IN pins, or am I overthinking that portion of it?

And then just a generic question, if I want to swap the motor directions after I have everything setup, is there any difference between moving the 5v high over to IN2 instead of IN1 vs just reversing the OUT1 and OUT2 that goes to the motor?

TrueNorthOP•11/16/25, 9:23 PM

@CoolBudy1 tldr are you needing speed controll seperatly?

TTrueNorth @CoolBudy1 tldr are you needing speed controll seperatly?

CoolBudy1•11/16/25, 9:24 PM

Yeah. Its for a pair of flywheels. Once set, the direction will never change, but I want to be able to control their speed independently.

TrueNorthOP•11/16/25, 9:25 PM

Ok then yes your setup should be fine.

TrueNorthOP•11/16/25, 9:26 PM

If you burn out the motor driver then let us know and we can set it up better

TTrueNorth If you burn out the motor driver then let us know and we can set it up better

CoolBudy1•11/16/25, 9:30 PM

For future reference, what would cause the motor driver to get burned up in this scenario? If there is a safer wiring setup to prevent it I'd love to start with that version lol

TrueNorthOP•11/16/25, 9:32 PM

So are the motors normal dc motors?

CoolBudy1•11/16/25, 9:33 PM

Yeah. 280 Micro DC Motors280 Micro DC Motors is the item description.

TrueNorthOP•11/16/25, 9:35 PM

Ok so then you can get away from the enable pis all together and just use the in1-4 pins. This will lower the power consumption and heat by half

CoolBudy1•11/16/25, 9:37 PM

If I skip the EN pins, don't I lose the ability to control their speeds? Or is there a different way of doing that

TrueNorthOP•11/16/25, 9:39 PM

No. Enable pis are for breaking.

Think like your riding a bike or driving a car.

With enable high the breaks are released.
With enable low the breaks are on fully.

So imaging if you was in a car trying to drive and anytime you was NOT activly speeding up the breaks were automatically locked up..

TrueNorthOP•11/16/25, 9:41 PM

Instead put the jumpers back on the enable pins.
And just move the wires you have to the enable pis to the corect directional high pins leave the grounds tied together

TrueNorthOP•11/16/25, 9:41 PM

If im reading it right. 11 would go to in1, and 10 to in4.

TTrueNorth No. Enable pis are for breaking. Think like your riding a bike or driving a car...

CoolBudy1•11/16/25, 10:01 PM

Oh okay. Didnt realize the EN pin worked like that. I figured it was the opposite. If that is the case it probably is worth having some form of input pin control.

Since the direction wont change, and I just need to control on/off with the INs, I wonder then if I can merge them together and have say GPIO pin 10 split and feed both IN1 and IN 4. Then with a single pin I can turn on/off both motors.

TrueNorthOP•11/16/25, 10:04 PM

The two enable pis are for useing the driver with a stepper motor. You want all your pins set. THEN send it to the motor. This en pins

Integrator•11/17/25, 4:10 AM

.hello folks

Integrator•11/17/25, 4:11 AM

how are your arduinos diong this days?

TTrueNorth so you will be charging it? Generaly you would have 2 circuts, one for charging,...

What Happens•11/17/25, 5:23 AM

It'll be measuring current output of our Battery for an electric go-cart. I need to be able to measure reverse current as well because of motor breaking. Im not sure how itll work because even if an Op Amp can do reverse voltage I dont think ADCs can.

TrueNorthOP•11/17/25, 5:28 AM

well motor breaking will be passing through another path also, you can not just feed it back through the same wire. so thats fine, you will still ahve two circuts. IF you did want to use a sensor to read in both directions, you would float the refrence of the device mesureing it, half way from the ground and positive on a isolated power sorce, then you would be able to read the "reverse" current flow. as you want.

TrueNorthOP•11/17/25, 2:24 PM

all grounds need to be conected yes

Dominique9325•11/17/25, 11:26 PM

anyone happen to know how exactly teco's AC remote communication protocol works? i've managed to figure out most of it but i find it odd that apparently only a single bit is dedicated to encoding swing and there's no distinction between horizontal and vertical swing so i wonder how the AC unit even knows what type or angle of swing to apply from that?

DarwinWasWrong•11/18/25, 12:16 AM

It would depend on the age of the aircon. The last codes I can find are 2019 for SAC9010QC - which has just a vertical swing

dazzlingdarkness•11/18/25, 6:08 PM

@Community Moderator i think you have a spam bot ^^^^

Alanprime•11/18/25, 11:11 PM

Hey all, I just got the new UNO Q but I'm having some issues I hope someone can help me, with Arduino App Lab asked me to update firmware, which I did to latest, BUT, now when I try to enter via Arduino APP Lab, it says update failed:
Error checking for updates: Board update error
Error checking for updates: Board update error

Alanprime•11/18/25, 11:11 PM

Since the board is very new, I can´t seem to find someone who has already got this error

TrueNorthOP•11/18/25, 11:12 PM

So far first impressions of the Uno q.

The box was damaged, not a big deal but kind of annoying. Board worked. Plugged it in and it complained the board software was too old. There are reports of the automatic updater not working. It did not work for me. Had to download the flasher. There seems to be status lights on the board when the program is running. They are the QRB and STM lights near pin 0.

I had downloaded the Arduino App Lab previously before getting the board (about 2 weeks). The old version did not work, there were a few issues with it. Loading software takes a bit. I would say make sure to go through the password setup and configuration before doing anything else (like updating it).

The Uno headers when you apply a little bit of tension make a not so great creaking sound. I thought I had broken it.

Other than that, the device is up and running (Windows 11) plugged into a high power USB C port. My guess is there will be issues with people's USB ports not providing enough power.

Also from the website (Apple’s USB-C dongle has been tested and found to be incompatible with the UNO Q. Please select an alternative part number.)

Because @Mineyoucraftube has issues with this, I am using Windows 11 Pro, 24H2, 26100.6899

TTrueNorth So far first impressions of the Uno q. The box was damaged, not a big deal but ...

Alanprime•11/18/25, 11:15 PM

I thought the same about the cracking sounds haha and I did try to password setup and config, however it didn't let me advance before updating firmware, which is not very cool to be honest haha

TrueNorthOP•11/18/25, 11:15 PM

@Alanprime so it looks like you should set up your account stuff.

Install the latest software again.

Update it it seams to tack a good while.

And make sure vpn/firewall/blocking software is not causing you issues.
@llamasama please clarify as needed.

TrueNorthOP•11/18/25, 11:16 PM

It might be a while before the user reply fyi

TTrueNorth @Alanprime so it looks like you should set up your account stuff. Install the l...

Alanprime•11/18/25, 11:16 PM

Already did 3 times

maybe I should try selecting another version other than latest?

TrueNorthOP•11/18/25, 11:17 PM

Could try. But everyone says the latest.

TrueNorthOP•11/18/25, 11:22 PM

https://www.arduino.cc/en/software/#flasher-tool
To update when the automatic one does not work this is the place. It will be hidden

TrueNorthOP•11/18/25, 11:22 PM

@Alanprime

so you will be charging it? Generaly you would have 2 circuts, one for charging, forward, One ofr d

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