@@hensonbl Thanks for the tip! Also wanted to suggest a video topic if you think others would find it useful. If you are powering the pico from a PI4 or similar via USB, it would make sense to consider also sending/receiving data over USB. There's some forum discussion about it but no decent tutorial that I'm aware of.
Hi Brad, please assist on how to add a command that enables an output GPIO when the voltage(ADC(26)) is above 2.3 V and disables when the voltage is or below 2.2 v
interesting but at 2.35 in the video you show a misleading representation of the pin 26 location on the pico it would be nice to get abtter appreciaton of the position an an ID of the pin. keep on your good work.
Could you make a video on how to control LED strips (Red to Violet) using a potentiometer ? Most LED strups are 5V so the 3.3 GPIO output wouldn't work
I will look into doing a video on that. The quick answer is to use a MOSFET with a really low Gate Threshold Voltage. The IRLB8721PbF MOSFET would be a good choice since it has a threshold voltage of 2.35 and it is in a TO-220 package for greater current capability.
@@hensonbl i see, is there a way to convert the potentiometer input to RGB (x,x,x) values ? think that would be faster considering we already have the ws2812b library
I was thinking about the hardware hookup, and if you are only controlling 30 or less ws2812b LEDs, you could simply use Pin 40 (VBUS) on the pico as the 5V source for the LED strip. As for mapping an RGB value based on a potentiometer input, I don't have a quick and easy solution. You could look at using the matplotlib python library, but I don't know if the pico will support it. stackoverflow.com/questions/39357633/how-do-i-convert-a-single-potentiometer-value-to-r-g-b
nice, only 3 typo's, luckily not in the code thonny user : print(dir(umachine)) shows all the options or do help(umachine) umachine, utime, micropython, rp2, uos or any library name (or part of) you imported, e.g. part => I2C, SPI, softI2C, softSPI, Pin, sleep, sleep_ms, const, localtime
you should have shown how stable the value is over at least 0.111111 Secs, c'mon man my experience shows it is noisy. secondly how do you get 16 bits from 12 bits, c'mon man
Very interesting stuff Brad! I always learn something new with your videos. Can’t wait to learn about controlling the brightness of an LED!
Great production quality! subbed!
Good job, clear to understand 💯
Concise and helpful! Currently trying to read from a strain gauge that maxes out at 3.5V, so hopefully not damaging the pico.
Thank you. I think you will be okay, but something to consider is using a voltage divider to limit the voltage being read into the ADC pin.
@@hensonbl Thanks for the tip! Also wanted to suggest a video topic if you think others would find it useful. If you are powering the pico from a PI4 or similar via USB, it would make sense to consider also sending/receiving data over USB. There's some forum discussion about it but no decent tutorial that I'm aware of.
Nice video !
Great video thanks very interesting and enjoyable
Glad you enjoyed it
Why the low end limit of 400? It's this a limitation of the Pico's ADC HW? Or micropython? Or... ?
awesome!
I like it.
Can I send the data to a local script to plot the voltage on my PC?
Hi Brad, please assist on how to add a command that enables an output GPIO when the voltage(ADC(26)) is above 2.3 V and disables when the voltage is or below 2.2 v
interesting but at 2.35 in the video you show a misleading representation of the pin 26 location on the pico it would be nice to get abtter appreciaton of the position an an ID of the pin. keep on your good work.
Liked and sub'd. How could I not?
That's awesome, I'm glad to hear that.
from machine import Pin, ADC
import utime
POT_Value = ADC(26)
conversion_factor = 3.3 / (65536)
while True:
print(POT_Value.read_u16() * conversion_factor)
utime.sleep(0.1)
thanks me later :p
Could you make a video on how to control LED strips (Red to Violet) using a potentiometer ? Most LED strups are 5V so the 3.3 GPIO output wouldn't work
I will look into doing a video on that. The quick answer is to use a MOSFET with a really low Gate Threshold Voltage. The IRLB8721PbF MOSFET would be a good choice since it has a threshold voltage of 2.35 and it is in a TO-220 package for greater current capability.
@@hensonbl i see, is there a way to convert the potentiometer input to RGB (x,x,x) values ? think that would be faster considering we already have the ws2812b library
I was thinking about the hardware hookup, and if you are only controlling 30 or less ws2812b LEDs, you could simply use Pin 40 (VBUS) on the pico as the 5V source for the LED strip. As for mapping an RGB value based on a potentiometer input, I don't have a quick and easy solution. You could look at using the matplotlib python library, but I don't know if the pico will support it.
stackoverflow.com/questions/39357633/how-do-i-convert-a-single-potentiometer-value-to-r-g-b
nice, only 3 typo's, luckily not in the code
thonny user : print(dir(umachine)) shows all the options or do help(umachine)
umachine, utime, micropython, rp2, uos or any library name (or part of) you imported,
e.g. part => I2C, SPI, softI2C, softSPI, Pin, sleep, sleep_ms, const, localtime
you should have shown how stable the value is over at least 0.111111 Secs, c'mon man my experience shows it is noisy. secondly how do you get 16 bits from 12 bits, c'mon man
The conversion factor, (3.3), needs to be adjusted per each board.