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by omegaman477
Mon May 27, 2019 2:37 pm
Forum: Other projects
Topic: aeroplane live feed to ground
Replies: 4
Views: 459

Re: aeroplane live feed to ground

The biggest factor in selecting a communications systems is understanding the amount of data you want to ship. Basic 360*540 10 fps video is a lot different from full 4kHD at 30 or 60fps. Is the received signal for just kick?, or for security or a HQ public broadcast? all have very different require...
by omegaman477
Mon May 27, 2019 2:19 pm
Forum: Automation, sensing and robotics
Topic: Hive Monitoring
Replies: 4
Views: 511

Re: Hive Monitoring

Greetings, Does anyone have recommended solutions or a sensor setup that would work for my project? I want to integrate movement , temperature , humidity , and carbon dioxide , along with a microphone for monitoring sound or sound levels, all onto a Raspberry Pi to capture data from inside my beehi...
by omegaman477
Mon May 27, 2019 2:09 pm
Forum: Automation, sensing and robotics
Topic: [ROS] 8-legged robot
Replies: 1
Views: 273

Re: [ROS] 8-legged robot

I have used this controller extensively in many projects. I have personally had 8 units realtime controlling 128 servos, all real time tracking. It controls any servo on the market. Its bullet proof, flexible and simple to control. Being I2C you can use many of them on one bus. It simplifies the Ser...
by omegaman477
Tue May 21, 2019 7:30 pm
Forum: Automation, sensing and robotics
Topic: Volume Scale
Replies: 3
Views: 458

Re: Volume Scale

To get the millimeter accuracy your require, will be hard with DIY lasers. I would seriously look at MAchine Vision, as this is the way the commercial volumetric scanners are going. You would need two cameras, one looking down to determine width and depth, and one from the back to sense width again ...
by omegaman477
Tue May 21, 2019 7:27 pm
Forum: Automation, sensing and robotics
Topic: Know where I can get reasonably priced DPST/DPDT 240v/8a to 240v/10a relays?
Replies: 16
Views: 1254

Re: Know where I can get reasonably priced DPST/DPDT 240v/8a to 240v/10a relays?

This is for high power computer equipment - so not inductive load and pretty constant power draw. 240v - constant pull at 5 to 6 amps depending on the unit. They are a pretty good load. I'll look at them. I'm finding more options in the 24v coil side - beginning to think that using the little JBtec...
by omegaman477
Sun May 19, 2019 5:52 am
Forum: Other projects
Topic: I want to build a peephole cam with Raspberry pi
Replies: 1
Views: 362

Re: I want to build a peephole cam with Raspberry pi

The camera you picked uses analogue or composite video, and that is not something a RPI can interface to out of the box. Look for a similar camera that is USB. That will plug straight in to the RPI. Or you can use a Composite Video encoder hat like https://www.electronicsweekly.com/blogs/gadget-mast...
by omegaman477
Sun May 19, 2019 4:16 am
Forum: HATs and other add-ons
Topic: PoE cable recommendation
Replies: 1
Views: 362

Re: PoE cable recommendation

Basic Cat.6 is fine. Your distances are very short.
by omegaman477
Sun May 19, 2019 4:10 am
Forum: Other projects
Topic: APCUPSD with multiple UPS on Stretch
Replies: 3
Views: 571

Re: APCUPSD with multiple UPS on Stretch

Check your system log files, what is the error(s) apcupsd is logging when it fails.

Feels like a config syntax error.

Invoke apcupsd with -d 9, to enable detailed logging.
by omegaman477
Sun May 19, 2019 3:32 am
Forum: Other projects
Topic: GPS/GRPS tracking help
Replies: 14
Views: 1095

Re: GPS/GRPS tracking help

Happy to help anytime
by omegaman477
Sat May 18, 2019 1:18 pm
Forum: Other projects
Topic: Small UPS for Raspberry pi
Replies: 19
Views: 1773

Re: Small UPS for Raspberry pi

There are quite a few UPS and battery hats available for the RPI. Some are very sophisticated and expensive. Option 1: This is a cheap one I found on Bangood, and I can vouch that it works 100%. https://www.banggood.com/Geekworm-UPS-HAT-Board-2500mAh-Lithium-Battery-For-Raspberry-Pi-3-Model-B-Pi-2B-...
by omegaman477
Sat May 18, 2019 1:02 pm
Forum: Automation, sensing and robotics
Topic: Detecting 250VAC voltage/current of deep well pump motor
Replies: 45
Views: 17188

Re: Detecting 250VAC voltage/current of deep well pump motor

My Project Rationale : I have a home automation project that I am just beginning. A 600 foot deep well provides water to my house. The well only produces 8 gallons/hour. Therefore I also have a 1700 gallon cistern to store the water before it is pumped into the house for use. There is a float valve...
by omegaman477
Fri May 17, 2019 7:57 am
Forum: Other projects
Topic: Raspberry pi as packet sniffing tool
Replies: 5
Views: 564

Re: Raspberry pi as packet sniffing tool

Hi, I have a school project and the aim is to load test a Rpi as a packet sniffing tool. I'm looking for a tutorial or advice. For now, I just connected two laptops via ethernet cable with the Rpi but I do now know how to start packet exchanging....any suggestion? Just remember that the RPI Etherne...
by omegaman477
Fri May 17, 2019 7:42 am
Forum: Other projects
Topic: Prayer Time Clock
Replies: 15
Views: 5552

Re: Prayer Time Clock

I had a question. Here's what I want to do: Have a RPi connected to a speaker. As soon as it is prayer time, it would play an audio file (call to prayer). The prayer timings are same every similar day of the year (7/9/2001 vs 7/9/2013). So you'd have to input them only once. Is this possible? Has a...
by omegaman477
Fri May 17, 2019 7:34 am
Forum: Other projects
Topic: Object Detection
Replies: 5
Views: 701

Re: Object Detection

Was thinking about this again, as I do. Cracks in an external concrete wall may be difficult to detect due to the lighting condition. I think the idea of taking the images and then on ground processing is good. I would also consider a couple of cameras, to get a aka 3D depth perspective, and maybe a...
by omegaman477
Fri May 17, 2019 7:30 am
Forum: Other projects
Topic: Controlling RGB Fans (Thermaltake Riing or Corsair LL Series)
Replies: 2
Views: 380

Re: Controlling RGB Fans (Thermaltake Riing or Corsair LL Series)

The actual fans are not I2C, but the controller chips on the PC MB usually are. I quote Wiki. The control signal for PC cooling fans is a square wave operating at 25 kHz, with the duty cycle determining the fan speed. Typically a fan can be driven between about 30% and 100% of the rated fan speed, u...
by omegaman477
Fri May 17, 2019 7:23 am
Forum: Other projects
Topic: Fitting a Raspberry pi into a calculator
Replies: 2
Views: 265

Re: Fitting a Raspberry pi into a calculator

I was wondering if it is possible to put a raspberry pi into a calculator and use the pi as a emulator and a calculator. I'd use an RPI Zero. The hardest aspects of these sorts of projects is interfacing the existing proprietary keyboard. Most calculator style keyboards are a simple crosspoint swit...
by omegaman477
Fri May 17, 2019 7:11 am
Forum: Other projects
Topic: GPS/GRPS tracking help
Replies: 14
Views: 1095

Re: GPS/GRPS tracking help

Minicom works because it sets the baud rate , word length and stop bits correctly. Usually NMEA interfaces operate at 9600, 8, N, 1 as default. You need your software (or a through the cmd line) to do the same before you try to read. This will set the baud rate to 9600, 8 bits, 1 stop bit, no parity...
by omegaman477
Wed May 15, 2019 3:49 am
Forum: Other projects
Topic: Multiple DS18B20 data lines on one GPIO pin?
Replies: 7
Views: 501

Re: Multiple DS18B20 data lines on one GPIO pin?

Yes. The DS18B20 is an I2C bus device, or 1-Wire. Yes, each DS18B20 has an internal unique address. Follow the datasheet examples for topology and pullup resistor. The default I2C libraries for Raspbian support multiple I2C devices on the one bus/pin. The application suite I2C-tools provides valuabl...
by omegaman477
Tue May 14, 2019 6:03 pm
Forum: Automation, sensing and robotics
Topic: I want to detect a flash of small pcb chip
Replies: 12
Views: 935

Re: I want to detect a flash of small pcb chip

Hello, I want to detect a flash of small pcb chip for that i want to use photodiode with rapsberry pi. Please suggest me what to do. Here's the diode i am using https://www.digikey.de/product-detail/de/vishay-semiconductor-opto-division/BPW21R/751-1013-ND/1681147?utm_adgroup=Optical+Sensors&mkwid=s...
by omegaman477
Tue May 14, 2019 5:57 pm
Forum: Other projects
Topic: GPS/GRPS tracking help
Replies: 14
Views: 1095

Re: GPS/GRPS tracking help

Your proposed comms plan seems fine. Just remember you only have 85kbit/s of bandwidth available. Although your actual GPS data payload is not large, when the VPN and SSH establish connections, they tend to exchange a lot of data during the opening. Due to the reduced bandwidth you may see some slow...
by omegaman477
Tue May 14, 2019 8:08 am
Forum: Other projects
Topic: stepper motors rattling
Replies: 4
Views: 498

Re: stepper motors rattling

A quick guess would be as you increase the duration of the step pulse, you may be exceeding the controllers timing requirements. I had a quick look at the datasheet for the TB67S109AFTG, and its a complex little beastie. The min/max step rate timing appears to be a function of the system clock, etc....
by omegaman477
Tue May 14, 2019 7:51 am
Forum: Other projects
Topic: Probe Module for Ds18b20 -- Alternative?
Replies: 4
Views: 397

Re: Probe Module for Ds18b20 -- Alternative?

Adafruit have an encapsulated, waterproof DS18B20. https://www.adafruit.com/product/381
by omegaman477
Tue May 14, 2019 7:48 am
Forum: Other projects
Topic: Auto ground effects kit
Replies: 2
Views: 292

Re: Auto ground effects kit

Look for RGB led strips that use the WS2812B chip. These style of strips allow you to individually control each led. Via your software you would group the leds into banks or zones. Here is a local supplier to me, but I have seen these strips on Banggood for less than $40. Get a waterproof version. h...
by omegaman477
Tue May 14, 2019 7:33 am
Forum: Other projects
Topic: Object Detection
Replies: 5
Views: 701

Re: Object Detection

YOLO is a pretty big task for the RPI, as mentioned, RAM is a factor. But I think that YOLO is overkill for such an application. Look into the various machine vision libraries/applications around, most should run well on a RPI. I am thinking about basic edge detection approach.
by omegaman477
Tue May 14, 2019 7:14 am
Forum: Other projects
Topic: GPS/GRPS tracking help
Replies: 14
Views: 1095

Re: GPS/GRPS tracking help

https://www.amazon.co.uk/gp/product/B075M8WN5L/ref=ask_ql_qh_dp_hza - Have purchased this for a play around with a project i would like to do just a simple tracker that i could remote access to pull the data and track in real time. I also have a raspberry pi zero to use with it. A couple of questio...

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