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by crocket
Fri May 10, 2019 2:59 am
Forum: Automation, sensing and robotics
Topic: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?
Replies: 6
Views: 503

Re: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?

For a product to use out of the box.. i use a broadcom Rm Mini device https://www.amazon.co.uk/Broadlink-Universal-Controller-Android-Cellphone/dp/B01HPWMWCY with the rm-node red node within node red on a pi-0-w to issue learnt IR commands via mqtt and alexa voice commands. imho the drawbacks are :...
by crocket
Thu May 09, 2019 2:58 am
Forum: Off topic discussion
Topic: My last post about IR transceiver seems to have been removed from this forum.
Replies: 15
Views: 1154

Re: My last post about IR transceiver seems to have been removed from this forum.

ejolson wrote:
Thu May 09, 2019 2:52 am
Could it have been tagged as a duplicate and removed for that reason?
It would be more appropriate to leave a post explaining the reason for locking the thread. That way, we know what happened.
by crocket
Thu May 09, 2019 2:25 am
Forum: Off topic discussion
Topic: My last post about IR transceiver seems to have been removed from this forum.
Replies: 15
Views: 1154

Re: My last post about IR transceiver seems to have been removed from this forum.

fruitoftheloom wrote:
Thu May 09, 2019 2:20 am
I do vaguely remember a post in "unanswered" Davy Crocket, seemed similar to this ?

viewtopic.php?f=37&t=239350&p=1461956#p1461956
I submitted another post after submitting that post. The newer post seems magically gone.
by crocket
Thu May 09, 2019 1:47 am
Forum: Off topic discussion
Topic: My last post about IR transceiver seems to have been removed from this forum.
Replies: 15
Views: 1154

My last post about IR transceiver seems to have been removed from this forum.

I don't remember deleting it myself. Was it removed by a moderator? If it was, nobody told a reason for deleting it.
Is there someone who dislikes me and snipes out my posts? Or, did anyone want to remove my criticism of IR transceiver products?
by crocket
Tue Apr 30, 2019 12:13 pm
Forum: Automation, sensing and robotics
Topic: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?
Replies: 6
Views: 503

Re: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?

They mention a 38KHz amplifier+de-modulator that runs at 3.3v just fine: https://www.adafruit.com/product/157 Keep in mind there are many different remotes, IR wavelengths, and any one of 34/38/40/56 kHz modulations. There were a few receivers that could auto-select several frequencies, but I can't...
by crocket
Tue Apr 30, 2019 9:01 am
Forum: Automation, sensing and robotics
Topic: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?
Replies: 6
Views: 503

Re: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?

sudo apt-get install lirc Then search for a tutorial about setting up the interface: http://alexba.in/blog/2013/01/06/setting-up-lirc-on-the-raspberrypi/ https://learn.adafruit.com/using-an-ir-remote-with-a-raspberry-pi-media-center/lirc This program has been around for a long time. https://gist.gi...
by crocket
Tue Apr 30, 2019 6:55 am
Forum: Automation, sensing and robotics
Topic: What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?
Replies: 6
Views: 503

What is the best way to add IR transmitter/receiver to raspberry pi 3 B+?

Currently, HiFiBerry Amp2 is added on top of Raspberry Pi 3 B+.

ANAVI infrared pHAT looks neat, but since Amp2 has tall capacitors on it, it seems I can't add it on top of Amp2.

The other two options are GPIO and USB. Do you know any good IR transmitter/receiver for GPIO and USB interfaces?
by crocket
Tue Apr 30, 2019 5:39 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

https://www.youtube.com/watch?v=O5GYh470m5k I think https://www.crowdsupply.com/anavi-technology/infrared-phat or any USB IR transmitter/receiver is the better solution because the light switch in my room can be controlled by an IR remote controller. My computer monitor can also be controlled by an...
by crocket
Sun Apr 28, 2019 4:33 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

Very wise practicing caution with mains power. sorry if my ebay link to an example of the cheapest devices available was misleading and requires a 5v dc power supply, that was a bad example to post in that case .. The crucial point being its essentially the same h/w thats inside the slightly more e...
by crocket
Tue Apr 23, 2019 12:07 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

you can ebay a very basic and blank esp8266-01 controlled relay module that you can program yourself Flashing software is relatively straightforward. The real challenge is making physical connections. The relay requires 5V power input and intercepts a power line. I don't know how to make physical c...
by crocket
Fri Apr 19, 2019 4:54 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

PhatFil wrote:
Thu Apr 18, 2019 5:59 am
you can ebay a very basic and blank esp8266-01 controlled relay module that you can program yourself
If such a module supports 802.11ax, I'm willing to learn how to program ESP8266. 802.11n and 802.11ac are not great for IoT devices.
by crocket
Thu Apr 18, 2019 1:38 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

Most 'smart' devices based on esp8265/6 wifi socs can with varying ease be reflashed with alternative firmware. Tasmota being a Very popular and fully featured option. - smart sockets advertised for use with an app called "smart Life" or "BrandName-Life" can CURRENTLY, be reflashed OTA without any ...
by crocket
Wed Apr 17, 2019 3:39 pm
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Re: Can a power line provide Raspberry Pi and a lamp with power?

"European Remote Controlled Sockets with Pi-mote" seems interesting. Is there a WiFi bulb that's not locked to a specific vendor software?
by crocket
Wed Apr 17, 2019 4:06 am
Forum: Automation, sensing and robotics
Topic: Can a power line provide Raspberry Pi and a lamp with power?
Replies: 16
Views: 887

Can a power line provide Raspberry Pi and a lamp with power?

I want to control a lamp with Raspberry Pi and a relay. However, I want a single power line to provide power for Raspberry Pi and the lamp.

How can I do that? In other words, I want to construct a WiFi lamp with Raspberry Pi, a relay, and a lamp.
by crocket
Mon Apr 15, 2019 11:30 pm
Forum: Graphics, sound and multimedia
Topic: I2S DAC (amp) vs USB DAC (amp)
Replies: 1
Views: 345

I2S DAC (amp) vs USB DAC (amp)

Advantages of I2S DAC (amp) There is no USB bus issue with I2S. At cheap prices, you get 24bit and 192khz. Advantages of USB DAC (amp) It can produce better audio than I2S DAC (amp) by having more free space for more components. I2S DAC (amp) cannot be big. If you are willing to spend money and you...
by crocket
Fri Apr 12, 2019 3:02 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Is it a bad idea to use a USB DAC with Raspberry Pi 3 B+?
Replies: 2
Views: 227

Re: Is it a bad idea to use a USB DAC with Raspberry Pi 3 B+?

I think you read from the wrong sources Supports Analog out via the 3.5mm audio jack (default setting). Supports HDMI audio up to 24 bit/192 khz. Supports I2S to Analog out. Supports I2S to S/PDIF out. Supports USB DACs up to 24 bit/192 khz. https://www.raspberrypi.org/forums/viewtopic.php?p=132712...
by crocket
Fri Apr 12, 2019 1:52 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Is it a bad idea to use a USB DAC with Raspberry Pi 3 B+?
Replies: 2
Views: 227

Is it a bad idea to use a USB DAC with Raspberry Pi 3 B+?

I read that a USB DAC doesn't work properly with Raspberry Pi due to USB bus issues.
I don't know whether it works properly with Raspberry Pi 3 B+.
by crocket
Sun Apr 07, 2019 1:26 am
Forum: Graphics, sound and multimedia
Topic: Which amps do you recommend for Raspberry Pi 3 B+?
Replies: 1
Views: 353

Which amps do you recommend for Raspberry Pi 3 B+?

I want to connect a pair of passive speakers to Raspberry Pi 3 B+. I want an amplifier that satisifes the following criteria. It lasts more than 10~15 years if it's left powered on. Components are easily replaced when they break. I could pair an external amplifier with HiFiBerry DAC+ or just use HiF...
by crocket
Sun Mar 31, 2019 11:04 pm
Forum: Graphics, sound and multimedia
Topic: How do I get low-latency audio over jack audio connection kit from onboard audio?
Replies: 0
Views: 293

How do I get low-latency audio over jack audio connection kit from onboard audio?

My gear is Raspberry Pi 3 B+. jackd -R -d alsa -d hw:ALSA,0 -p 128 (2.7ms of latency) // jackd fails jackd -R -d alsa -d hw:ALSA,0 -p 256 (5.3ms of latency) // sound becomes completely garbled jackd -R -d alsa -d hw:ALSA,0 -p 512 (10.7ms of latency) // sound becomes choppy jackd -R -d alsa -d hw:ALS...
by crocket
Fri Mar 29, 2019 4:19 pm
Forum: Graphics, sound and multimedia
Topic: How can i have speakers connected and have a jack free when i need to use headphones
Replies: 3
Views: 359

Re: How can i have speakers connected and have a jack free when i need to use headphones

HIFIBERRY DAC+ STANDARD – PHONE JACK VERSION adds an additional audio output to your raspberry pi. The sound quality is good. Watch Which HiFiBerry is the right one for you? You can switch between two audio outputs by executing a command that toggles the mute status of both outputs. However, beware...
by crocket
Fri Mar 29, 2019 4:10 pm
Forum: Gentoo
Topic: [SOLVED] Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.
Replies: 28
Views: 3026

Re: Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.

Nice tip about audio_pwm_mode=2 btw, I will merge that ^-^ At first, I recommended adding the following lines to /boot/config.txt audio_pwm_mode=2 disable_audio_dither=1 pwm_sample_bits=16|24 It turned out that fiddling with disable_audio_dither and pwm_sample_bits only decreased audio quality. I c...
by crocket
Fri Mar 29, 2019 3:19 pm
Forum: Graphics, sound and multimedia
Topic: I concluded that the onboard sound on Raspberry Pi 3 B+ is pretty good.
Replies: 0
Views: 319

I concluded that the onboard sound on Raspberry Pi 3 B+ is pretty good.

After I realized that fiddling with pwm_sample_bits and disable_audio_either only decreased sound quality, I left only audio_pwm_mode=2 in /boot/config.txt. audio_pwm_mode=2 seems to improve audio quality. After hours of listening test, I concluded that the quality of onboard sound from Raspberry Pi...
by crocket
Fri Mar 29, 2019 5:20 am
Forum: Gentoo
Topic: [SOLVED] Behringer UCA202 or HiFiBerry DAC+?
Replies: 8
Views: 1399

Re: [SOLVED] Behringer UCA202 or HiFiBerry DAC+?

My decision

If I decide to upgrade my audio, I will buy HiFiBerry DAC+ Standard 3.5mm Headhone Jack version.
by crocket
Thu Mar 28, 2019 12:34 pm
Forum: Gentoo
Topic: [SOLVED] Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.
Replies: 28
Views: 3026

Re: Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.

The regulatory rules for wireless, esp. 5Ghz are onerous. Our chip supplier is being exceptionally cautious with regard to this so they don't get fined for breaching rules. So the firmware that runs on the wireless chip (a cypress device) is very careful in what domains are enabled. This is out of ...
by crocket
Thu Mar 28, 2019 5:18 am
Forum: Gentoo
Topic: [SOLVED] Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.
Replies: 28
Views: 3026

Re: Connecting headphones to the onboard sound jack of RPi 3B+ increases WiFi latency a lot.

Solution I tested Raspberry Pi on the latest stable version of Raspbian. With regulatory domain set to KR, most frequencies are disabled. But, for available frequencies, connections can be made properly without crashing WiFi firmware. It seems that I didn't install all firmware files. After copying...

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