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by pksato
Mon Jul 09, 2018 5:22 pm
Forum: Português
Topic: troca de leitor de cartao
Replies: 2
Views: 291

Re: troca de leitor de cartao

Ola, Não compreendi a pergunta. O slot do cartão SD esta fisicamente danificado? Partes ou contatos elétricos quebrados? Se for um dano elétrico/eletrônico não tem como consertar, o controlador do cartão SD esta embutido no SoC (chip principal). Não lembro de ter lidos relatos de problemas elétricos...
by pksato
Mon Jul 02, 2018 11:51 am
Forum: Troubleshooting
Topic: One-way pinging/route tracing problem within the same LAN
Replies: 17
Views: 452

Re: One-way pinging/route tracing problem within the same LAN

Hi, Create a new rule on windows firewall to accept ICMP Echos and others related to ping and traceroute. Or just disable windows firewall. Do same on Arch Linux. Some debug procedures. O RPi, iptables -I FORWARD -t mangle -i wlan0 -o eth0 -j LOG iptables -I FORWARD -t mangle -i eth0 -o wlan0 -j LOG...
by pksato
Fri Jun 29, 2018 5:26 pm
Forum: Troubleshooting
Topic: A/V connection problem
Replies: 15
Views: 324

Re: A/V connection problem

serozhax wrote:
Fri Jun 29, 2018 2:55 pm
pksato wrote:
Fri Jun 29, 2018 2:02 pm

Code: Select all

hdmi_ignore_hotplug=1
IT WORKS!!!! Thank you!!!

P.S. If i want connect HDMI must I change this setting?
Yes, need to set to 0 or comment or remove the line.
by pksato
Fri Jun 29, 2018 5:22 pm
Forum: Troubleshooting
Topic: Two internet connections
Replies: 2
Views: 112

Re: Two internet connections

Hi, For output connection route metric and routing table are enough. But, for input, can have a problem, connection from second interface return using same routing decision as output, on most case client reject the connection assuming that is a spoofed connection. Or redirection just not work. To so...
by pksato
Fri Jun 29, 2018 2:02 pm
Forum: Troubleshooting
Topic: A/V connection problem
Replies: 15
Views: 324

Re: A/V connection problem

Hi,
Or need to force composite output disabling HDMI.

Code: Select all

hdmi_ignore_hotplug=1
From wikipedia Russia use Secam as ATV color system. But, LG TV also is compatible with PAL.
by pksato
Thu Jun 28, 2018 5:30 pm
Forum: Beginners
Topic: Playing 4 individual sounds out of 4 individual speakers
Replies: 2
Views: 100

Re: Playing 4 individual sounds out of 4 individual speakers

Hi everyone, Just got my Raspberry Pi 3 and I'm very excited to learn how to use this! For context, I'm designing an android mobile app that will have the user press one of four buttons. Each button is mapped to a sound that will play on a specific speaker connected to a raspberry pi. You need to p...
by pksato
Mon Jun 25, 2018 7:15 pm
Forum: General discussion
Topic: Digital to analog TV signal converter
Replies: 4
Views: 300

Re: Digital to analog TV signal converter

Hi,
A Set Top Box/Converter can be more cheap that a RPi+USB Receiver.
That is you country or digital standard?

For me, on Brazil, RPi + USB receiver cost 4 times that a Set Top Box. And, most of USB receiver only support low resolution stream (1seg, 240x150).
by pksato
Thu Jun 21, 2018 7:10 pm
Forum: Português
Topic: Carregador TURBO no Raspberry Pi 3 B+
Replies: 5
Views: 640

Re: Carregador TURBO no Raspberry Pi 3 B+

Ola, O turbo se refere a tecnologia de carregamento rápido. Existem dois tipos de carregadores de bateria usado em smartphones e tablets. O mais comum e do tipo burro, sempre fornece uma tensão de 5V e com uma corrente máxima de até 2A. E, carregador rápido, ou inteligente, o aparelho que esta sendo...
by pksato
Thu Jun 21, 2018 11:14 am
Forum: General discussion
Topic: Convert Raspbian Stretch Lite to video-output
Replies: 13
Views: 707

Re: Convert Raspbian Stretch Lite to video-output

Hi fred44nl, You not need a video output to transncode or convert a video or audio formats. VLC, mencoder, ffmpeg, etc can do it via command line. Or use a DLNA capable of transcoding. Like this https://bitbucket.org/stativ/readymedia-transcode . Trascoding on RPI can be very slow, if software not s...
by pksato
Wed Jun 20, 2018 1:37 pm
Forum: Beginners
Topic: Correct PINOUT identification: GPIO in/out RASP PI Zero and model B SOLVED
Replies: 8
Views: 211

Re: Weird problem with GPIO in/out in RASP PI Zero and model B

OK - fixed that - nothing changed :( Trilple checked pinout, is correct :/ Check connection pin again. https://camo.githubusercontent.com/3af697a8467ed5288e78a473e873625fa2b9811c/68747470733a2f2f6d6172636f6d696e657276612e626c6f622e636f72652e77696e646f77732e6e65742f70686f746f732f52617370626572727950...
by pksato
Wed Jun 20, 2018 11:09 am
Forum: Beginners
Topic: ssh .... I became a little headless..
Replies: 10
Views: 382

Re: ssh .... I became a little headless..

Hi Meino, Raspberry Pi Zero is configured as client, like any other wifi client devices, you can not see it on WiFi connection list. Application like finger for android can scan wifi network and list the network devices on network. Can verify on you Fritz!Box if have a wifi association or dhcp lease...
by pksato
Tue Jun 19, 2018 12:25 pm
Forum: Beginners
Topic: ssh .... I became a little headless..
Replies: 10
Views: 382

Re: ssh .... I became a little headless..

Hi, I think, you are making some confusion. After re-read you original post, watch linked video, some google search. Video is about using windows as host. Not Gentoo Linux. You not have access to rpi0w, yet. If you run a ifconfig, it can be done only on Gentoo Linux. ifconfig is returning gentoo ips...
by pksato
Mon Jun 18, 2018 6:50 pm
Forum: Beginners
Topic: ssh .... I became a little headless..
Replies: 10
Views: 382

Re: ssh .... I became a little headless..

Hi mccpi,
You are sure that using the correct rpi0 ip?
Is not clear if you ssh attempt done using wifi or usb tethering.
On case of usb, you are not using PC ip? Check auth log or IDS on gentoo.
by pksato
Mon Jun 18, 2018 11:59 am
Forum: General discussion
Topic: Interfacing an LCD display to the Pi
Replies: 7
Views: 360

Re: Interfacing an LCD display to the Pi

Hi,
I found this datasheet of some LB070WV1 panel.
It use a LVTTL (3v3) parallel interface, can be connected to Raspberry Pi DPI (Parallel Display Interface).
Also, need to provide the backlight power (can be removed from original circuit).
Using DPI you lost most of GPIO pins.
by pksato
Fri Jun 15, 2018 12:16 pm
Forum: Troubleshooting
Topic: Can't connect to domain name, but with IPv4 it works
Replies: 3
Views: 225

Re: Can't connect to domain name, but with IPv4 it works

Hi, Internet is moving to IPv6, and it cause some problems if you not have IPv6 connectivity. IPv6 stack is present even if you not have a IPv6 connection to internet, and IPv6 have preference. To mitigate this IPv6 issues: Not configure IPv6 on network interfaces (inclusive lo) Disable IPv6 on kern...
by pksato
Fri Jun 15, 2018 11:39 am
Forum: Beginners
Topic: How to stop multiple detection of button press?
Replies: 8
Views: 262

Re: How to stop multiple detection?

Hi, You need to use debouncing to prevent multiple trigger. A simple debouncing is to add a little delay after action (email sent). Also have hardware debouncing methods, like a capacitor in parallel with switch. A long wiring can act as electric field antenna and trigger the input, a capacitor from...
by pksato
Wed Jun 13, 2018 11:49 am
Forum: Beginners
Topic: Radio Receiver
Replies: 7
Views: 286

Re: Radio Receiver

Hi finnbo11, You need to be more clear about you needs. I don,t know other FM module that use other chip. SiLab have a series of broadcast radio chips, but, I don't know if have a cheap modules using it. I find one: https://www.sparkfun.com/products/12938 tea5767 can power from 3V to 5V, can be conn...
by pksato
Sat Jun 09, 2018 12:41 pm
Forum: Beginners
Topic: CGI Bash script
Replies: 5
Views: 235

Re: CGI Bash script

Hi,
quote the testing string variable.

Code: Select all

if [ [ "$ACT1" != "IN1=on" -a "$ACT1" != "IN1=off"] -o [$ACT2 != "IN2=on" && $ACT2 != "IN2=off"] ];
These conditional are correct?

If have a php, why cgi using bash?
Use php popen() to call you script or other executable. Or proc_open().
by pksato
Sat Jun 09, 2018 12:17 pm
Forum: Beginners
Topic: Static IPs for 45 Raspberry Pis!
Replies: 16
Views: 737

Re: Static IPs for 45 Raspberry Pis!

You need to each SD card have a unique IP or each board have a unique IP? For SD, a symlink on /etc/network/interfaces.d to a file on /boot. I not sure if work. For each board, need to use some unique information from hardware, board serial, mac address, eeprom, etc... And use a init script or some ...
by pksato
Sat Jun 09, 2018 11:51 am
Forum: Beginners
Topic: rpi3 gpio speakers
Replies: 14
Views: 734

Re: rpi3 gpio speakers

Hi,
In addition to the speaker you will need a power amplifier, like PAM8403 module (search on you favorite electronic gadget store).
It is a small class D audio amplifier.
And a TRRS plug (old/cheap smartphone earphone/mic cable). Or solder wires direct to pads of A/V jack.
by pksato
Fri Jun 01, 2018 5:43 pm
Forum: Beginners
Topic: external power supply
Replies: 3
Views: 209

Re: external power supply

Hi,
Didoes can be used switch between two or more power sources.
Each power source have a diode in series.
The main power need voltage little bit high that others.
Use Schottky diodes (1N5820) with low voltage drop.
by pksato
Wed Jan 24, 2018 11:24 am
Forum: Beginners
Topic: Powering Pi3b from car battery, need some advice on capacitors.
Replies: 7
Views: 574

Re: Powering Pi3b from car battery, need some advice on capacitors.

Hi,
A quick schematics about my idea to power RPI from a car electric system.
Its is a not tested circuity.
Image
by pksato
Mon Oct 24, 2016 10:47 am
Forum: Beginners
Topic: Pi 1 Model B Video compatibility issue
Replies: 10
Views: 1326

Re: Pi 1 Model B Video compatibility issue

Hi, If you TV is exact same model of radiomuseum, the have a video input on back. Connect RPi video out (RCA) to video input on TV. Change AV/TV switch to AV. TV still working? Tune open air analog TV station (if have one)? Or if on all digital region, TV screen show noise? Next, need to for raspber...
by pksato
Fri Aug 05, 2016 6:32 pm
Forum: Beginners
Topic: RasPi as a print server (without Linux drivers)
Replies: 2
Views: 618

Re: RasPi as a print server (without Linux drivers)

Hello,
You can use a Raw Queue.
But, I don't know if work with any printer.
One problem can is to configure printer driver on windows/linux/mac to use this raw queue.
by pksato
Fri Aug 05, 2016 1:02 pm
Forum: General discussion
Topic: Switching on a 220v AC Mains bulb
Replies: 26
Views: 3494

Re: Switching on a 220v AC Mains bulb

Hi, Incandescent light bulb some time are used on chicken egg incubators. And on a paper dry box (?). 8A at 12VDC is more harder to handle that 100W at 220VAC (0.45A). Both can hurt you and start a fire. SSR like Fotek SSR25 have only the screws exposed, if used correct terminals, it is very safe. R...

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