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by snazzify
Mon Jan 28, 2019 1:00 am
Forum: Troubleshooting
Topic: RetroPie v4.4 Cannot Control USB Sound Volume After Update/Upgrade
Replies: 0
Views: 104

RetroPie v4.4 Cannot Control USB Sound Volume After Update/Upgrade

I'm using a Game Boy Zero Controller with builtin C-Media USB audio on a Raspberry Pi Zero , 3 B, 3 B+, and 3 A+. Sound Settings under emulationstation menu works perfect with version 4.3 and stock 4.4 and I can control the sound volume level just fine. But after updating/upgrading RetroPie v4.4 I c...
by snazzify
Thu Jan 17, 2019 2:12 am
Forum: Advanced users
Topic: GPIO-POWEROFF: Is it safe to immediately cut power off when pin goes LOW?
Replies: 3
Views: 516

Re: GPIO-POWEROFF: Is it safe to immediately cut power off when pin goes LOW?

rpdom wrote:
Thu Jan 17, 2019 1:54 am
Yes, it is safe. You should see the 10 flashes of teh ACT LED just before the pin changes state.
I can only see about 3-4 blinks of the ACT LED when issuing

Code: Select all

sudo shutdown -h now
but if I shutdown without using the GPIO-POWEROFF the ACT LED certainly blinks more about 10 flashes.
by snazzify
Thu Jan 17, 2019 1:48 am
Forum: Advanced users
Topic: GPIO-POWEROFF: Is it safe to immediately cut power off when pin goes LOW?
Replies: 3
Views: 516

GPIO-POWEROFF: Is it safe to immediately cut power off when pin goes LOW?

I'm using the following code to detect shutdown so i can cut off power.

Code: Select all

dtoverlay=gpio-poweroff,gpiopin=10,active_low=1
My real concern is, is it safe to immediately cut off power when the GPIO pin goes low? Or do I need some delay like maybe 1-3 seconds or something?
by snazzify
Sun Aug 19, 2018 6:56 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 453
Views: 216147

Re: Modifying a 3.5" car display for USB power.

I followed a guide at Wiring Guide for the 3.5″ GearBest Screen with 5V Mod for my screen.
Capture.PNG
Capture.PNG (205.56 KiB) Viewed 465 times
by snazzify
Sat Jul 14, 2018 2:26 am
Forum: Advanced users
Topic: PWM hardware for dimming LCD
Replies: 3
Views: 412

PWM hardware for dimming LCD

I'm using the pigpio pwm hardware on gpio18 of a Raspberry Pi 3 to adjust the brightness of an LCD with a FAN5333 chip. I tested some software pwm code but dimming is unstable so im trying pwm hardware. Bash command: pigs hp 19 1000 500000 C program : #include <stdio.h> #include <stdint.h> #include ...
by snazzify
Sat Jul 07, 2018 11:36 pm
Forum: Advanced users
Topic: How to output both left and right audio on a single PWM pin(18)?
Replies: 2
Views: 406

Re: How to output both left and right audio on a single PWM pin(18)?

Yeah thanks. I got it working using the code on tinkerBOY's website.
by snazzify
Wed Jul 04, 2018 12:07 pm
Forum: Advanced users
Topic: How to output both left and right audio on a single PWM pin(18)?
Replies: 2
Views: 406

How to output both left and right audio on a single PWM pin(18)?

The code at http://www.tinkerboy.xyz/raspberry-pi-downmixing-from-stereo-to-mono-sound-output/ works with an external USB sound device but i cannot get it to work with PWM audio. Im using GPIO18 on the Pi Zero to output sound but i'd like both the left and right audio without using GPIO13. Is this p...
by snazzify
Mon Jan 01, 2018 11:00 am
Forum: Raspbian
Topic: How to check a clean shutdown?
Replies: 1
Views: 274

How to check a clean shutdown?

I'm just wondering if there's a way to check if my if my Pi was shutdown properly?
by snazzify
Fri Dec 22, 2017 5:22 am
Forum: Advanced users
Topic: Pi Zero PWM audio using different GPIO pins?
Replies: 1
Views: 583

Pi Zero PWM audio using different GPIO pins?

Is there a way to use different gpio pins other than the usual gpio18 and gpio13 or gpio19?

In the config.txt:

Code: Select all

dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4
Can I change the pins to something like 4 and 21?
by snazzify
Sun Dec 10, 2017 6:36 am
Forum: Advanced users
Topic: How do you display a message or picture before switching off the power supply?
Replies: 1
Views: 337

How do you display a message or picture before switching off the power supply?

Is there a way to do this? I just want to display something that tells the user that it's now "safe to switch off".
by snazzify
Mon Jul 31, 2017 4:40 pm
Forum: HATs and other add-ons
Topic: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi
Replies: 47
Views: 51500

Re: [Review] KeDei 3.5" HDMI display with touch for Raspberry Pi

Thank you! Mine works great!

My only concern is the brightness, its a little too dark. Is there a way to adjust the brightness?
by snazzify
Fri Jul 07, 2017 2:26 am
Forum: Advanced users
Topic: How to switch between HDMI & composite automatically
Replies: 2
Views: 1576

Re: How to switch between HDMI & composite automatically

Unless you have forced the configuration to use the composite output only, the RPi will normally default to using the HDMI output if one is connected, so you should normally be able to just plug a HDMI screen in, turn on your RPi and it should use the HDMI straightaway. If it is not connected, it s...
by snazzify
Thu Jul 06, 2017 12:16 pm
Forum: Advanced users
Topic: How to switch between HDMI & composite automatically
Replies: 2
Views: 1576

How to switch between HDMI & composite automatically

Im currently building a handheld retropie gaming console (gameboy zero) using a raspberry pi zero. The screen is a 3.5" lcd with a 320x240 resolution. I will be playing mostly with this small screen but I would also like to connect it to an HDMI tv/monitor. Is there a way to automatically switch bet...
by snazzify
Fri Aug 12, 2016 10:39 am
Forum: Wanted
Topic: Looking for an old Raspberry Pi Model B with 256mb
Replies: 0
Views: 1176

Looking for an old Raspberry Pi Model B with 256mb

anyone with an old raspberry pi model b? im looking for the first gen with only 256mb of RAM.
by snazzify
Thu Aug 11, 2016 12:47 am
Forum: Other projects
Topic: Case for the first gen Raspberry Pi Model B
Replies: 3
Views: 1324

Re: Case for the first gen Raspberry Pi Model B

Anyone knows where to get a metal/aluminum case instead? Like the Kodi Edition Raspberry Pi case.
by snazzify
Thu Aug 11, 2016 12:45 am
Forum: Other projects
Topic: Case for the first gen Raspberry Pi Model B
Replies: 3
Views: 1324

Re: Case for the first gen Raspberry Pi Model B

You did not say were in the world you are, but UK ebay still has them for about £3 to £4 the first 2 I found. http://www.ebay.co.uk/itm/Black-Closed-Case-for-Raspberry-Pi-Model-B-Brand-New-/261396771907?hash=item3cdc763443:g:AOYAAOxy4dNS-wsS http://www.ebay.co.uk/itm/Raspberry-Pi-Closed-Case-Box-Hi...
by snazzify
Fri Jul 29, 2016 4:59 am
Forum: Other projects
Topic: Case for the first gen Raspberry Pi Model B
Replies: 3
Views: 1324

Case for the first gen Raspberry Pi Model B

I still use my old raspberry pi model b everyday with OPENELEC Kodi installed in it. It's at the back of my TV without a case and very dusty too. So anyone still sells a case for it?

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