Search found 42 matches
- Mon Feb 04, 2019 6:21 pm
- Forum: Beginners
- Topic: samba file server- delete file from windows pc
- Replies: 9
- Views: 3436
Re: samba file server- delete file from windows pc
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 ...
- Mon Feb 04, 2019 6:18 pm
- Forum: Beginners
- Topic: samba file server- delete file from windows pc
- Replies: 9
- Views: 3436
Re: samba file server- delete file from windows pc
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...
- Mon Feb 04, 2019 12:23 pm
- Forum: Beginners
- Topic: samba file server- delete file from windows pc
- Replies: 9
- Views: 3436
samba file server- delete file from windows pc
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...
- Thu Dec 06, 2018 11:44 am
- Forum: Python
- Topic: 'arecord' command using 'subprocess' in python
- Replies: 3
- Views: 1082
Re: 'arecord' command using 'subprocess' in python
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' ...
- Thu Dec 06, 2018 7:52 am
- Forum: Troubleshooting
- Topic: audio recording using pyaudio - clicking noise
- Replies: 1
- Views: 1307
audio recording using pyaudio - clicking noise
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...
- Thu Dec 06, 2018 5:41 am
- Forum: Python
- Topic: 'arecord' command using 'subprocess' in python
- Replies: 3
- Views: 1082
'arecord' command using 'subprocess' in python
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...
- Mon Nov 12, 2018 8:26 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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...
- Mon Nov 12, 2018 8:08 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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...
- Fri Nov 09, 2018 12:40 pm
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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...
- Fri Nov 09, 2018 7:54 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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?

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?

- Thu Nov 08, 2018 1:50 pm
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
@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.....
- Thu Nov 08, 2018 8:23 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
@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...
- Thu Nov 08, 2018 1:57 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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...
- Thu Nov 08, 2018 1:43 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
No. Without fan relay board works fine.Pedro_Lopes wrote: ↑Wed Nov 07, 2018 5:42 pmWithout the fan's connected to the relay, do you have the same problem?
- Wed Nov 07, 2018 5:35 pm
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Re: Relay board and back emf issue
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...
- Wed Nov 07, 2018 10:49 am
- Forum: Beginners
- Topic: Relay board and back emf issue
- Replies: 18
- Views: 1874
Relay board and back emf issue
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...
- Thu Nov 01, 2018 11:08 pm
- Forum: Beginners
- Topic: Sharing 3.3V pin for two devices
- Replies: 4
- Views: 520
Sharing 3.3V pin for two devices
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 MC...
- Tue Oct 09, 2018 4:52 am
- Forum: Beginners
- Topic: Raspberry pi and three relay board power supply
- Replies: 3
- Views: 802
Re: Raspberry pi and three relay board power supply
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...
- Sun Oct 07, 2018 8:30 am
- Forum: Beginners
- Topic: Raspberry pi and three relay board power supply
- Replies: 3
- Views: 802
Raspberry pi and three relay board power supply
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...
- Wed Sep 05, 2018 10:18 am
- Forum: Troubleshooting
- Topic: I2S MEMS Microphone Right CHN Mono Using pyaudio
- Replies: 0
- Views: 619
I2S MEMS Microphone Right CHN Mono Using pyaudio
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...
- Fri Aug 03, 2018 8:01 pm
- Forum: Troubleshooting
- Topic: Unable to record audio using USB Sound Card
- Replies: 0
- Views: 185
Unable to record audio using USB Sound Card
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. ...
- Thu Jul 19, 2018 6:53 am
- Forum: Python
- Topic: Adafruit DHT22 pass sensor value dynamically
- Replies: 1
- Views: 593
Adafruit DHT22 pass sensor value dynamically
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...
- Sun Jun 24, 2018 5:55 pm
- Forum: Beginners
- Topic: 5V relay to control a 0.5HP pump
- Replies: 19
- Views: 2044
Re: 5V relay to control a 0.5HP pump
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...
- Sun Jun 24, 2018 5:42 pm
- Forum: Beginners
- Topic: 5V relay to control a 0.5HP pump
- Replies: 19
- Views: 2044
Re: 5V relay to control a 0.5HP pump
@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...
- Sun Jun 24, 2018 2:15 pm
- Forum: Beginners
- Topic: 5V relay to control a 0.5HP pump
- Replies: 19
- Views: 2044
Re: 5V relay to control a 0.5HP pump
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...