Raspberry Pi Forums

satish.gunjal

When you say " I am not able to delete file from my windows PC" do you mean "I am unable to use my Pi to delete files that exist on my windows PC" or "I am unable to use my windows PC to delete files on my Pi's samba share"? If the latter, my guess it's likely to be a problem with linux permissions...

satish.gunjal

Try the share like this: [RecordedFiles] Comment = Pi shared folder Path = /home/pi/RecordedFiles read only = no create mask = 0777 directory mask = 0777 Guest ok = yes You do not need these lines: Browseable = yes only guest = no Writeable = Yes Public = yes The first two are default settings, the...

satish.gunjal

I am using samba file server to copy files from raspberry to windows PC. I am able to copy files from RPI but I am not able to delete file from my windows PC. Get access denied error. Followed below url for samba server installation. https://www.raspberrypi.org/magpi/samba-file-server/ Added below l...

satish.gunjal

thanks it worked!! working code... import subprocess import os import time import signal #proc_args = ['arecord', '-D' , 'dmic_sv' , '-c2' , '-r' , '44100' , '-f' , 'S32_LE' , '-t' , 'wav' , '-V' , 'mono' , '-v' , 'subprocess1.wav'] proc_args = ['arecord', '-D' , 'plughw:1' , '-c1' , '-r' , '44100' ...

satish.gunjal

I am using Adafruit I2S MEMS microphone for recording the audio. I am able to record audio using 'pyaudio' library in python. But audio quality is not good. Lots of clicking noise in audio. Below are my findings.. Test#1: Audio recorded using below script for 30 sec. No clicking noise recorded. This...

satish.gunjal

I am using Adafruit I2S MEMS microphone with Raspberry Pi Zero W. Followed the Adafruit guide to configure the microphone. I am able to record the audio using below commands. arecord -D plughw:1 -c1 -r 48000 -f S32_LE -t wav -V mono -v file.wav arecord -D dmic_sv -c2 -r 44100 -f S32_LE -t wav -V mon...

satish.gunjal

few more observations For my RPi shutdown setup i am using GPIO 26. I have trigger setup to shutdown the RPi if user press button for more than 3 seconds. Observation#1. if fan is started and stopped withing 2 minutes. Most of the time i receive the trigger on GPIO 26. I am only monitoring GPIO 26 n...

satish.gunjal

Yes your Opto Circuit is correct. What I am trying to do is take you through the process of elimination First what I mean by not common the Ground 0-v is as follows Pi ground 0-v--------X-------ground 0v--Battery Power When using opto isolators you don't need any return connection back to the Pi Do...

satish.gunjal

I am beginner and i haven't used optocoupler as of now ... attached the sketch of my setup with PC817. Since i am using USB hub, will it still qualify as separate power supply for relay board? https://i.imgur.com/i4WcTtD.jpg You have the Pi 5v from the Power bank, Use a 5v power adapter To feed the...

satish.gunjal

I am beginner and i haven't used optocoupler as of now ...
attached the sketch of my setup with PC817. Since i am using USB hub, will it still qualify as separate power supply for relay board?

satish.gunjal

@Pedro_Lopes My setup is as below: 5V 2A wall adapter powering Adadfruit powerboost 1000C. Output from powerboost connected to USB hub. And from USB hub i am powering RPi and two relay boards. Max current consumption is less than 700mA. And powerboost can supply 1A. Please correct me if i am wrong.....

satish.gunjal

@klricks test setup: # 50W fan connected to 'NC' and 'COM' pins of relay board # Relay board and RPi started # python script is stopped. Not controlling the relay from RPi Now if I stop the fan EVERY TIME RPi stops!! one more thing i observed... I am also using Adafruit powerboost 1000C with below c...

satish.gunjal

Are you overloading the GPIO? The maximum limit per GPIO is 16mA, with a maximum limit across all GPIO together being no more than 50mA I don't think so. Relay board works fine without fan connected. I have switched on all the 8 channels on 5V 10A relay board and 1 channel on 5V 30A relay board for...

satish.gunjal

Pedro_Lopes wrote: ↑
Wed Nov 07, 2018 5:42 pm
Without the fan's connected to the relay, do you have the same problem?

No. Without fan relay board works fine.

satish.gunjal

Has the jumper on the relay board been removed, as you are running external power? Yes(JD-VCC & VCC are not connected by jumper). Connections are as below. Connected +ve wire of external power supply to JD-VCC pin of 8 Channel relay Connected -ve wire of external power supply to Ground pin of 8 cha...

satish.gunjal

I am using 5V 10A, 8 channel relay board ( https://www.amazon.in/JBTek-Channel-Control-Optocoupler-Arduino/dp/B00KTELP3I ) to exhaust fans(50W). Each relay will need 15 to 20mA current. Relay board is externally powered. Using python script on my raspberry pi zero W. No problem starting the the exha...

satish.gunjal

I am using raspberry pi zero W. Both the 5 V pins are used for DHT22 and AM2302 temp & humidity sensors. one 3.3V pin used for Adafruit PiRTC - PCF8523 Real Time Clock for Raspberry Pi. And the last remaining 3.3V is used for VCC of 8 channel relay board (externally powered) . I am also using MCP 30...

satish.gunjal

why use the high power 30a relays with such low power devices, a low power fan and i guess even less demanding pump? If the devices your controlling are fed by mains power and that fails why do you need the relays to be supplied from your limited battery backup power. As long as the pi remains aliv...

satish.gunjal

I am using Adafruit Powerboost 1000C and LIPO batteries to power my Raspberry pizero w . Raspberry pi will be used to automate my grow room. I will be using 5V 10A, 8 channel relay board ( https://www.thingbits.net/products/8-channel-5v-relay-module ) to control lights and exhaust fans. Each relay w...

satish.gunjal

I am using Adafruit I2S MEMS Microphone Breakout for recording. ref. https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout?view=all When i wire the Mic to RPI in Mono configuration as per below image I am able record audio using arecord command and below python code https://cdn-learn.adaf...

satish.gunjal

Followed every step in 'USB Audio Cards with a Raspberry Pi' Adafruit guide, but unable to record the audio. USB Audio Cards with a Raspberry Pi - https://learn.adafruit.com/usb-audio-cards-with-a-raspberry-pi Haven't received any error but instead of audio only silent wav file is getting recorded. ...

satish.gunjal

I am using below python code to get the temp and humidity reading. sensor = Adafruit_DHT.DHT22 pin = 23 humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) everything works fine but since i am using multiple sensors(DHT11, DHT22, AM2302) I am planing to make it dynamic and pass sensor and p...

satish.gunjal

The relay you have found will work, it appears to be correctly rated I'm not convinced of that at all. I can't see any specification for inductive loads, only the vague claim that it can be used to switch motors - how big a motor? That's why I said "possibly". Contactors generally do have 240V AC c...

satish.gunjal

@pcmanbob, @davidcoton I am not working on mains part of this project. Qualified electrician is doing all the mains work. Since I am designing the system I am trying my best to know all the possible solutions before finalising one. We understand the risk involved with 240 AC and we are taking all th...

satish.gunjal

So using contactor is one safe and possible way of doing it. I also found 20A Single relay board. Manufacturer claims it will support loads like motor etc. Relay board link: https://researchdesignlab.com/20a-single-relay-board.html#product_tabs_description_tabbed The board works on 12V but the input...

Search found 42 matches

Re: samba file server- delete file from windows pc

Re: samba file server- delete file from windows pc

samba file server- delete file from windows pc

Re: 'arecord' command using 'subprocess' in python

audio recording using pyaudio - clicking noise

'arecord' command using 'subprocess' in python

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Re: Relay board and back emf issue

Relay board and back emf issue

Sharing 3.3V pin for two devices

Re: Raspberry pi and three relay board power supply

Raspberry pi and three relay board power supply

I2S MEMS Microphone Right CHN Mono Using pyaudio

Unable to record audio using USB Sound Card

Adafruit DHT22 pass sensor value dynamically

Re: 5V relay to control a 0.5HP pump

Re: 5V relay to control a 0.5HP pump

Re: 5V relay to control a 0.5HP pump