Hmmm

thank you very good answer!

the same people are here lol

hello, i have a quick question. programs without root access can't read from swap space right?

oh i found the ask ubuntu room never mind

sorry if this is off topic for this room

hello, i have a quick question. programs without root access can't read from swap space right?

ahh cool thanks!

add this diode

reading the datasheet the VREG_2V7 is a 2.7 V internal regulator output st.com/resource/en/datasheet/stusb4500.pdf and the typical application example in the datasheet doesn'

what is the purpose of the diode used in the VREG_2V7 pin in this schematic cdn.sparkfun.com/assets/9/2/6/8/6/…

I'm actually a software engineer but EE is pretty cool so i'm learning a lot

yeah I have been looking for a chip. I'll do some more research. USB type c PD is pretty cool and I can request 15v from charger. i will see If can find and easy to use chip for that. I'm designing my first PCB and it's already getting too crowded lol

how's something like this typically designed in modern electronics? current limiting + a switching regulator?

Page 13 in the data sheet i linked above "9.3.3 Precision Current-Limiter Circuit" basically this circuit attached to the second lm317 that regulates the voltage

The circuit using two LM317 uses the first one to limit the current and the second to fix the voltage right?

If I fix the voltage with LM317 to 14v what is the maximum current the battery can draw?

I guess the question should be what happens if I try to take more than 1.5A from LM317?

it's okay to charge it 1.5A even 2A but not more

my logic is that LM317 can't provide more than 1.5A anyway does it have a current limit protection?

both

basically use the schematic in the first page of the data sheet ti.com/lit/ds/symlink/lm317.pdf?ts=1592236938131

i want to charge a battery at 14v 1A. Can I use a single LM317 to regulate voltage from 19v without worrying about current limiting? I don't want the battery to draw more than 1.5A.

what does NOPB mean? there is LM2596SX-3.3 and LM2596SX-3.3/NOPB D

it communicates via UART

the lidar works with it but sends garbage data

5.1v i tested another D36V50F5 to make sure i don't have a faulty one

the only tool i have is a cheap multimeter

The power source is just a 12v battery connected to the D36V50F5 to step down the voltage to 5v. If I replace D36V50F5 with LM2596 it works.

I'm a noob in EE. is there a reason for this?

i have a lidar that seems very sensitive to the power source. When powered via the PC's usb it works great. It also works when powered via LM2596, but it doesn't seem to work with a "high-end" step-down regulator like the D36V50F5. pololu.com/product/4091

I have an IR range sensor that can do 60 Hz update rate. Does that mean that I can get 60 Reads per second ?

@NickAlexeev what keywords can I use to look this up?

The only reason I'm using 20Khz is to get rid of the annoying noise of the DC motors.

Why is it always that more powerful devices like Intel Edison and many others, have less GPIOs and PWM pins than regular MCUs. It is very handy for prototyping :(

Are you aware of any alternative to Intel edison that has good wifi connectivity with this amount of PWM pins ?

to drive six motors

If it is zero, then why it isn't Ω instead of O according to this i.imgur.com/XEp7Xn6.png

I'm not exactly sure what ratio of f(n)/g(n) would be when limit approaches infinity.

Can anyone explain how f(n) is O(g(n)) in this case i.imgur.com/sKGPlp5.png ?

oh because of ceil :)

but why would the possible values be 2,3,4,5. There could be 5.9 still less than 6

to get 1 < 2x+1 ≤ 5

definition of ceiling function is ⌈ x ⌉ = n - 1 < x ≤ n but I'm not sure how to apply it to 1 < ⌈ 2x+1⌉ < 6

ceiling function

Hello, any idea how 1 < ⌈ 2x+1⌉ < 6 is equivalent to 1 < 2x+1 ≤ 5 ?

No, i just lose points if did not include the unit of measurement so making sure it's just units

Ahh thats what i thought my math professor so bitchy about these things :(

yeah the general units. For instance "cubic units" "units" or what ever

Is it just the result for instance "10 units" and thats it?

What are the units of the arc length equation tutorial.math.lamar.edu/Classes/CalcII/ArcLength_files/… ?