Keep making videos! We need your talents... I'm struggling with a Web 1 POST call right now. It would be nice if there were more good videos out there. Thanks for you efforts...
Thanks for the informative video Nathan. Is there a way we can modify the slider to accommodate more than 3 positions between Min and Max. I am looking at using the slider to control the Speed of an Induction motor running off a VFD via a PWM to 0-10V converter and Arduino. TIA
Hi, I'm have a Rpi and have no problem sending and receiving text to the python shell, I used buttons and sent text, For the slider, I used call BluetoothClient. Send 1Byte round slider thumb. but the slider gives the following error. UnicodeDecodeError: 'utf-8' codec can't decode byte 0x9e in position 0: invalid start byte The slider does work if i send text but i need intergers for motor control It doesn't seem to recognize the incoming as a value from 0, 255. Any ideas?
Hi Nathan, Is it possible to make the slider that it can't be moved. I am making a calculator app and if the values on other sliders meet a certain number I wan't the slider to lock in position so it cant be moved. Then the only way it can be moved is by changing the value to a smaller number on the other sliders. Any help would be appreciated Thanks
Hey Callum, I don't use App Inventor that much anymore, but I think I can at least get you on the right track. You would have to create a trigger on each slider for when the value is changed. Then you could have the event check the values of each slider, then if the values meet a certain criteria you could disable the 3rd slider. Say you have 3 sliders, X, Y, and Z, and you want Z disabled if X AND Y are set over 3. Again, off the top of my head, I think it would be something like the "when changed" block, If xValue > 3 AND yValue > 3 then change Slider Z "Active(guessing on the block here)" to False. else Slider Z "Active" true. I forget if App Inventor has the AND operator in it's if statements and what the exact names of the blocks are, but I hope this helps.
This is one of the best tutorials i found on RUclips adressing stuff in mit app inventor. Awsome
Keep making videos! We need your talents... I'm struggling with a Web 1 POST call right now. It would be nice if there were more good videos out there. Thanks for you efforts...
This helps so much, thanks!
Thanks for this video, NathanTR.
is it possible to make a vertical slider?
Thanks for the informative video Nathan.
Is there a way we can modify the slider to accommodate more than 3 positions between Min and Max. I am looking at using the slider to control the Speed of an Induction motor running off a VFD via a PWM to 0-10V converter and Arduino. TIA
Hi, I'm have a Rpi and have no problem sending and receiving text to the python shell, I used buttons and sent text, For the slider, I used call BluetoothClient. Send 1Byte round slider thumb.
but the slider gives the following error.
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x9e in position 0: invalid start byte
The slider does work if i send text but i need intergers for motor control
It doesn't seem to recognize the incoming as a value from 0, 255. Any ideas?
if make vertical slide??
hello
I want to send the slider value to url
plz help me
thank you!!
شكرا اخي كيغ بدي اساوي الصوت بحيث اتحكم فيه اقدمو او ارجعو بالدقايق تبعوتو مثل مشغلات الموسيقا واوجو الرد وشكرا لجهودك
Hi Nathan,
Is it possible to make the slider that it can't be moved. I am making a calculator app and if the values on other sliders meet a certain number I wan't the slider to lock in position so it cant be moved. Then the only way it can be moved is by changing the value to a smaller number on the other sliders.
Any help would be appreciated
Thanks
Hey Callum, I don't use App Inventor that much anymore, but I think I can at least get you on the right track.
You would have to create a trigger on each slider for when the value is changed. Then you could have the event check the values of each slider, then if the values meet a certain criteria you could disable the 3rd slider.
Say you have 3 sliders, X, Y, and Z, and you want Z disabled if X AND Y are set over 3. Again, off the top of my head, I think it would be something like the "when changed" block, If xValue > 3 AND yValue > 3 then change Slider Z "Active(guessing on the block here)" to False. else Slider Z "Active" true.
I forget if App Inventor has the AND operator in it's if statements and what the exact names of the blocks are, but I hope this helps.