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Open-Source 4WD AI Robot Kit Compatible with Raspberry Pi Models 4 and 5
(linuxgizmos.com)
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Set an information display at work
(lemmy.zip)
Pi4 1gb, posters on left with feh, info board on right which is a html file running on chromium
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Had been waiting for my pi 5 argon case which got lost in the post before I could set this up. Ive been tinkering with an old SFF PC running arch over the last few months to get a "smart tv" set up going that im happy with, now ive condensed it down into a little debian box that uses a fraction of the electricity. Happy days.
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If I use an audio board like this? Can I no longer power the Pi using the GPIO pins?
(learn.adafruit.com)
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New to Raspberry Pi, looking for advice on a project.
(lemmy.world)
Hello, I’m starting a project to build something for a friends kid who’s father is a Huey pilot. I ordered the switch/panel in the image and want to 3d print an enclosure to mount it on that plays the song when the switch is in the on position.
Per the website the switch is fully functional, I just need to wire it to something to use it. Does anyone have suggestions on a bare bones controller to use and how to set it up to play an MP3 so long as the switch is in the on position? In a perfect world I would love for it to resume the position if it’s quickly toggled but restart if it sits more than a minute or so but realistically just playing the song would be more than enough.
While I’m new to Raspberry Pi I’m not that daunted by the task. I’ve been soldering since elementary school and have a degree in comp sci, but haven’t done any coding since graduating 10+ years ago. I do have a Pi hole but using an off the shelf package on a premade pi with step by step instructions doesn’t really count as “experience” for pi in my opinion.
Any suggestions are welcome, especially if someone can recommend some mini speakers that actually sound half decent. I’m not looking to tear a Bose Bluetooth apart but something slightly less tin-canny than a 2004 Nokia ringtone would be nice.
Thanks in advance!
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Putting my #raspberrypi to good use by profiling my internet speed over the last six days. Looks like a seismometer at a System of a Down concert!
(files.mastodon.social)
Putting my #raspberrypi to good use by profiling my internet speed over the last six days. Looks like a seismometer at a System of a Down concert!
I am **not** very proficient in programming, but can someone please suggest some nice little projects like this for me, please?
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Pi Powered Cuckoo Clock
(lemmy.world)
For her birthday my daughter received a cuckoo clock. It had very limited programming for 'quiet hours' so I fiddled with it and ended up breaking it. I didn't want to disappoint her so I gutted it and proceeded to install a Pi Zero W and a headphone amplifier I had built. She now has a fully programmable, USB powered, linux based cuckoo clock where I can program it to whatever suites our needs and it syncs it's time with NTP severs. I even connected her night light to it which turns on at night and off to let her know when its time to get out of bed. This combination also allows us to have dance parties with flashing lights, a dancing bird and fun songs coming out of her cuckoo clock. It's ridiculous and eccentric but it makes us happy!
Build
- The Pi Zero's dont come with a sound output so I built an audio output filter to convert the PWM output to an analog audio output
- Connected the analog out to a OPA1642 based headphone amplifier I designed and built
- Wired up the cuckoo bird's coil actuator to a simple MOSFET drive circuit to control it from the Pi's weak GPIO output
- Wired up some 5V string lights (used to be battery powered) to a simple MOSFET driver circuit to control it from the Pi's 3.3V GPIO output
- Wrote some bash code to make the bird dance, the light flash and the cuckoo bird sounds play
- All the scheduling and execution of the code is done clean and simple in crontab
- I also have a text to speech engine verbally state the hour after the cuckoo action so my daughter can better learn to tell time by herself
To re-map the audio to the PWM0 output of the Pi
add to /boot/config.txt to remap the audio to the PWM0 and PWM1 pins of the pi.
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
#remaps the audio to the PWM0 and PWM1 pins (pins 18 and 13)
dtoverlay=audremap,pins_18_19
Code
Cron Scheduling
@reboot /home/pi/startup.sh
#cuckoo between 8am and 6pm, inclusive
0 8-18 * * * /home/pi/cuckoo.sh
#turn on the night light at 6:15 pm
15 18 * * * echo "1" > /sys/class/gpio/gpio26/value
#turn off the night light at 6:15 am
15 6 * * * echo "0" > /sys/class/gpio/gpio26/value
Startup Configuration for GPIO
#!/bin/bash
#setup the GPIO
#"In order to use a GPIO pin through sysfs, we first have to “export” each one to make the appropriate paths available."
echo "17" > /sys/class/gpio/export
echo "26" > /sys/class/gpio/export
#set direction
echo "out" > /sys/class/gpio/gpio17/direction #cuckoo movement
echo "out" > /sys/class/gpio/gpio26/direction #nightlight
Flashing Light Code
#!/bin/bash
i=1
while [ "$i" -le 3 ]; do
#turning the GPIO on
echo "1" > /sys/class/gpio/gpio26/value
sleep 0.050
echo "0" > /sys/class/gpio/gpio26/value
sleep 0.050
i=$((i + 1))
done
Cuckoo Code
#!/bin/bash
i=1
echo "Looping "$(date +%I)" times"
while [ "$i" -le "$(date +%I)" ]; do
aplay /home/pi/cuckoo.wav &
#flash the lights three times quickly
/home/pi/flash.sh &
#turn on the cuckoo bird coil to make it bob down and flaps its wings
echo "1" > /sys/class/gpio/gpio17/value
sleep 0.300
#turn off the cuckoo bird coil so it sits back down
echo "0" > /sys/class/gpio/gpio17/value
sleep 0.700
i=$((i + 1))
done
#Text to speech engine, speaks the current hour through the speaker
#date + sed command below returns the hour, in 12 format, and the sed command removes the leading zeros
espeak -v mb-en1 -s 120 "it is $(date +%I | sed 's/^0*//') oh clock"
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