Go to advanced search

by omegaman477
Tue Mar 05, 2019 1:48 am
Forum: Automation, sensing and robotics
Topic: Matlab to python serial communication
Replies: 4
Views: 416

Re: Matlab to python serial communication

so as long as I set the baud rate, comm port numbers, start-stop bits etc i should be able to communicate between the 2 languages right? also, would a simple USB to female jumper wire () be sufficient or would I require some sort of an adaptor between the two devices? Thanks a lot for your time The...
by omegaman477
Tue Mar 05, 2019 1:37 am
Forum: Automation, sensing and robotics
Topic: Recommendation for Lights: 2 Second Flash
Replies: 1
Views: 233

Re: Recommendation for Lights: 2 Second Flash

I would look to either daylight colour temperature LED panels the photographers use (super cheap on ebay). Some have a variable colour temperature. U get them in a large round panel for portraits or a square panel for bounce/fill etc. Otherwise, I have seen daylight equivalent LED panels for aquariu...
by omegaman477
Tue Mar 05, 2019 1:28 am
Forum: Automation, sensing and robotics
Topic: Raspberry Pi employee clock
Replies: 1
Views: 311

Re: Raspberry Pi employee clock

Sound idea, well done. Personally I would use Python, as virtually every RPI H/W supplier ships their libraries in Python. Its emerging as the language of choice for so much in the RPI world. I used to cut C and Perl for decades. Now all I use is Python. There are Python libraries to create Open Off...
by omegaman477
Tue Mar 05, 2019 1:16 am
Forum: Automation, sensing and robotics
Topic: measure power useage
Replies: 4
Views: 638

Re: measure power useage

look for those power boards, with integral power monitoring, often over Bluetooth, or USB. Cheap.
by omegaman477
Tue Mar 05, 2019 1:12 am
Forum: Automation, sensing and robotics
Topic: How to use accelerometer to monitor rotating machine health
Replies: 2
Views: 267

Re: How to use accelerometer to monitor rotating machine health

Acoustic signatures (infrasonic, audible and ultrasonic) are commonly used to monitor mechanical machines. A baseline recording is made, and periodically a series of microphones record new samples and these are compared in software. This approach allows you to detect a myriad of faults, wear, speeds...
by omegaman477
Tue Mar 05, 2019 1:07 am
Forum: Automation, sensing and robotics
Topic: Measuring linear distance and get live reading on webserver
Replies: 5
Views: 663

Re: Measuring linear distance and get live reading on webserver

As a general rule in industrial applications, always consider the environment when selecting a sensor. I suspect your products are made with coal dust, or similar and that stuff gets into everything, its also semi-conductive. Be sure to select a proper sealed industrial rotary encoder, do not use a ...
by omegaman477
Tue Mar 05, 2019 12:55 am
Forum: Automation, sensing and robotics
Topic: Matlab to python serial communication
Replies: 4
Views: 416

Re: Matlab to python serial communication

So a basic serial (aka RS232) interface is usually Asynchronous, meaning it will simply send a given ASCII character from one system to another. Assuming you have them correctly wired, and the Bitrate, Stop Bits and Parity are all the same at both ends, characters will pass. At each end, in each app...
by omegaman477
Mon Mar 04, 2019 12:57 pm
Forum: Automation, sensing and robotics
Topic: Solar battery meter with automation
Replies: 2
Views: 231

Re: Solar battery meter with automation

I have not seen any purpose Solar Management style hats for the RPI. But the application you describe is fairly simple H/W wise. Key to success will be accurate measurement of Solar Panel and Battery Voltages, plus the current draw/supply for each and the load. For this I would look for a general pu...
by omegaman477
Mon Mar 04, 2019 12:47 pm
Forum: Automation, sensing and robotics
Topic: ubuntu[18.04] to Rpi 3b+ communication using python 3
Replies: 2
Views: 262

Re: ubuntu[18.04] to Rpi 3b+ communication using python 3

Yes, you can get any two systems to communicate, assuming they have a common communication standard. So, the easiest is TCP/IP over whatever WiFi/Radio/Ethernet/USB transmission medium you want. TCP/IP is standard on every Linux, and most Unix implementations. Start simple using Ethernet then branch...
by omegaman477
Mon Mar 04, 2019 12:37 pm
Forum: Automation, sensing and robotics
Topic: Hardware to detect trains
Replies: 7
Views: 696

Re: Hardware to detect trains

HermannSW wrote:
Sat Mar 02, 2019 9:11 am
omegaman477 wrote:
Fri Mar 01, 2019 11:17 pm
Laser reflection
That might be a problem for people inside the train and seeing the laser.

Clarification: Low power IR Laser. Even IR LEDs may produce enough reflection to trigger a well shielded IR sensor.
by omegaman477
Fri Mar 01, 2019 11:59 pm
Forum: Automation, sensing and robotics
Topic: DS18B20 randomly missing connection
Replies: 3
Views: 860

Re: DS18B20 randomly missing connection

I suspect the cable length is a bit long for a simple pullup; especially the star configuration. You could try rewiring all the sensors in a 'daisy chain' along one piece of wire, and if the wiring permits you could split the pullup resistor into two higher value resistors, with one at the Pi and t...
by omegaman477
Fri Mar 01, 2019 11:56 pm
Forum: Automation, sensing and robotics
Topic: Remote Socket RF sniffing
Replies: 3
Views: 823

Re: Remote Socket RF sniffing

Hi All I have been putting some time to try to sniff the rf from an Arlec RC210 remote socket using a generic 433 receiver. I have installed PiScope and pigpiod and I can get it to run but I only seem to have lines running across PiScope. So it seems I am not receiving anything, I am not receiving ...
by omegaman477
Fri Mar 01, 2019 11:25 pm
Forum: Automation, sensing and robotics
Topic: Sensor to detect Vape smoke
Replies: 4
Views: 898

Re: Sensor to detect Vape smoke

I would like to use the Pi to detect the vapor exhaled by an e-cigarette but can't figure out what type of sensor to use. There are some commercially available detectors but they are marketed towards schools and are cost prohibitive. Even if you can just point me in the right direction that would b...
by omegaman477
Fri Mar 01, 2019 11:17 pm
Forum: Automation, sensing and robotics
Topic: Hardware to detect trains
Replies: 7
Views: 696

Re: Hardware to detect trains

Hi everybody, I want to use my Raspberry Pi to detect passing trains and don't know which sensor to buy. I live right next to the rails and can both hear the passing train, as well as feel the vibrating floor - so both sound and motion detection could work. My concern with the vibration sensor is t...
by omegaman477
Fri Mar 01, 2019 11:15 pm
Forum: Automation, sensing and robotics
Topic: Sensing the level/volume of a tank full with woodchips
Replies: 13
Views: 1013

Re: Sensing the level/volume of a tank full with woodchips

Hello, I've searched the internet for a sensor that can measure the level of a tank full with woodchips. So far I only came access with liquid level sensors and I wondered if there is something similar for solides (maybe a volume sensor?). I was thinking about using the ultrasonic sensor hc-sr04. B...
by omegaman477
Fri Mar 01, 2019 11:13 pm
Forum: Automation, sensing and robotics
Topic: Ultrasound sensor alternatives?
Replies: 11
Views: 1392

Re: Ultrasound sensor alternatives?

Working on a small simple robot project at the moment, currently thinking of a simple way to make it avoid obstacles, perhaps in the future also follow a certain path or moving target. After some research I found that ultrasound sensors were commonly used and easy to learn way to make your robot to...
by omegaman477
Fri Mar 01, 2019 11:11 pm
Forum: Automation, sensing and robotics
Topic: Water Depth Sensing
Replies: 10
Views: 2004

Re: Water Depth Sensing

I have a friend who uses a laser based device to measure distance from the laser to the surface of the water, which he reads in a vertical pipe to reduce wave action. Once calibrated the water level change it is easily tracked. Measuring the depth of a natural body of water is problematic as the bo...
by omegaman477
Fri Mar 01, 2019 11:05 pm
Forum: Automation, sensing and robotics
Topic: Water Depth Sensing
Replies: 10
Views: 2004

Re: Water Depth Sensing

Many thanks for all these thoughtful replies - you've given me some ideas to get started. fish finding is probably the way to go - will report back. Pretty amazed that no-one else has wanted to measure water depth in this community before, but there you are. Depending on your electronic skills, mak...
by omegaman477
Fri Mar 01, 2019 11:06 am
Forum: Automation, sensing and robotics
Topic: Digital Gas Sensor NO2 Module
Replies: 1
Views: 210

Re: Digital Gas Sensor NO2 Module

Most gas sensors are analogue devices that change their capacitance or resistance according to the gas levels detected. Some require an excitation voltage, and some (aka some detectors) use a weak radioactive element in the sensor. From memory So to feed N02 levels into a RPI you will need to provid...
by omegaman477
Fri Mar 01, 2019 10:58 am
Forum: Automation, sensing and robotics
Topic: Safe LIDR for Rasperry Pi
Replies: 2
Views: 205

Re: Safe LIDR for Rasperry Pi

The use of Visible RED lasers under 2mW, or IR under 5mW are approved in most countries for domestic applications.

Case in point the new Xiaomi S50 Robot Vacuum.
by omegaman477
Fri Mar 01, 2019 10:56 am
Forum: Automation, sensing and robotics
Topic: Water Depth Sensing
Replies: 10
Views: 2004

Re: Water Depth Sensing

To do what you need want to do, is best solved by a standard yacht or boat ultrasonic depth sensor. Instantaneous, rapid, and low power. The bigger units come with a Nautical Interface (NMEA) which will easily allow a RPI to read the depth data via basically RS232. But these units are expensive. Loo...
by omegaman477
Sun Nov 12, 2017 8:46 am
Forum: Automation, sensing and robotics
Topic: ESC With Raspberry PI Servo Hat
Replies: 2
Views: 570

Re: ESC With Raspberry PI Servo Hat

I am using the Adafruit Servo Hat and a BRUSHED ESC no problems.
by omegaman477
Thu Oct 26, 2017 8:56 pm
Forum: Beginners
Topic: Control circulation pumps, how should I approach this?
Replies: 5
Views: 954

Re: Control circulation pumps, how should I approach this?

So I assume you mean you will install a windows O/S on the PI? I am not sure if that HAT has libraries other than Python, 99% of PI interfacing is in Python, its the preferred language. The HAT I suggested is I2C connected so you will need to start with a I2C library for Windows IOT, Im sure it exis...
by omegaman477
Thu Oct 26, 2017 12:29 pm
Forum: Automation, sensing and robotics
Topic: How use phone bluetooth to reboot Zero?
Replies: 13
Views: 2490

Re: How use phone bluetooth to reboot Zero?

A simple approach I used was to BT drop a small file from the phone to the RPI bluetooth share folder. The file had a long password in it, the RPI was configured that files dropped can not be read back. A simple script in BASH looked for the file, opened it, checked the password, closed and deleted ...
by omegaman477
Thu Oct 26, 2017 12:09 pm
Forum: Beginners
Topic: Quick question with resistors
Replies: 10
Views: 1206

Re: Quick question with resistors

Hello, I recently received these https://www.amazon.com/gp/product/B06VVDZZTH/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 laswer diodes and want to power them with the raspberry pi. From my understanding the GPIO pins output at 3.3 V and can't exceed 16 mA. In the description it says that at 3.3 Vo...

Go to advanced search