General discussion • Re: Battery cost
2 * 3.7 volts is 7.4 volts. Feed into a regulator to get 5 volts. The combined charging voltage would be 8.8 but the batteries could be charged in parallel from USB 5 volts or in series from 12...
View ArticleTroubleshooting • Re: NTP server client not working
What does ntpq -p -n tell you?I get this from my working NTP systemCode: dougie@apollo:~$ ntpq -p -n remote refid st t when poll reach delay offset...
View ArticleBeginners • Re: Best book for learning gpio programming on raspberry pi zero?
I'm looking for a book that teaches gpio pins programming on the raspberry pi zero in depth I'll float an idea that other well-informed forum members can shoot down if necessary -I doubt that any such...
View ArticleGeneral discussion • Re: Raspberry Pi 5 discussion thread
Simply adapt the dtb. I guess there's no need for the hdmi entry in there, if the dtparam=audio and/or the gpu driver in config.txt controls it.Basically all params and functions are controlled from...
View ArticleRaspberry Pi Connect • Re: Unable to start RPI Connect
I get the same thing - Raspberry Pi 3B+, on latest Bookworm 64-bit image (installed today):Ref: https://www.raspberrypi.com/news/raspberry-pi-connect/Raspberry Pi Connect needs your Raspberry Pi to be...
View ArticleBare metal, Assembly language • Re: How would one go about linking two or...
Seems you are looking for something like PCIe so each core can access the same memory. This isn't possible on the RP2040.Statistics: Posted by jamesh — Thu May 09, 2024 12:22 pm
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General discussion • Failing To Run Some Video Files at VLC Media Player
Hi,I tried to run some video files on Pi 5's VLC Media Player, however VLC could not run some files that run fine on my PC.Firstly, I was able to run one video with the following codec info And it was...
View ArticleAutomation, sensing and robotics • Re: digital 24V input and output using CM4...
When you connect 'something' to the output, then you need two connections. Here it is 'output_plus' and 'output_minus'.For this design, 'output_plus' is just connected to 24V. 'output_minus' is...
View ArticleGraphics, sound and multimedia • Re: PI2W vlc mmal-layer now missing.
Threads sometimes get missed.MMAL has been deprecated since Bullseye, and isn't present by default on Bookworm.The kernel DRM / KMS framework will only allow a single master at a time, whereas MMAL...
View ArticleTroubleshooting • Re: An Operation Is Already Pending
I have a pendrive. it was exFAT format. it was detecting on pi 5 with no issues. i formated it to NTFS format. since then, no longer detecting on pi 5. Then i again formatted it to exFAT and it is...
View ArticleBeginners • Re: Raspberry Pi Imager
I am not sure but I think the keygen stuff might only be enabled when Imager is run under Linux.The text would be the generated key, and would look something like this. Probably some way of generating...
View ArticleTroubleshooting • Re: Possibly not a Pi problem... Network connections.
The OP’s description isn’t very consistent but suggests a problem with ARP refreshes.This is more likely to happen over wireless. Are any of these computers connected over wireless?Statistics: Posted...
View ArticleC/C++ • Re: Introducing WiringPi C Library 3.4
People moving from sysfs to v1 bothers me as v1 is also deprecated. It will eventually go away as well. Then we'll get the same "hey where did that interface go?" dramas that we are seeing for sysfs...
View ArticleAutomation, sensing and robotics • Re: Can't measure resistors
This might be useful for analysis. I only process data where the ends of the divider read 40 and 4082 ...How close V reading is to expected V calculated from actual Rh:RsCode: .-----.-----....
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Camera board • Re: night vision ir camera issue
I have not applied the json file to my code. Do you know where or how I can access this?The following code, when inserted after creating the picam2 object, but before configuring or starting the...
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Graphics, sound and multimedia • Re: TFT display without Desktop in Linux?
SPI is a bit harsh a UX for smaller displays already, I don't think I would like the update rate DSI, I see, nice flat connection with powering, has its attractiveness to it.But the Pi Zero seems not...
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General discussion • Powering pi and ir leds at the same time
I want to perform pose estimation 24/7. using an ir camera I can sort of execute pose estimation at night time. however, I may need to use extra ir illuminators so that I can achieve the correct...
View ArticleGeneral discussion • Re: UART TX is always high (3.3V) and doesn't get to 0V
Can you set the pin high/low using pinctrlCode: sudo pinctrl set 14 op dhsudo pinctrl set 14 op dlWith no other stuff connected to GPIO and no apps using AMA0Statistics: Posted by neilgl — Sat May 11,...
View ArticleRaspberry Pi OS • Re: Ookla speedtest DNS issue
It could be that speedtest is not able to reach a predefined server (it maybe off-line / busy).I think that's unlikely. All other systems on my LAN have no issue reaching speedtest servers.You could...
View ArticleOff topic discussion • Re: 3v3 gpio output plus low voltage battery, is it...
https://www.ti.com/lit/gpn/ULN2803CIs an ideal candidate for driving relais. Has output clamp diodes integrated as it was designed for driving inductive loads.Statistics: Posted by aBUGSworstnightmare...
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