Go to advanced search

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: 79

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: 76

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: 1
Views: 54

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: 11
Views: 304

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: 399

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: 32
Views: 14092

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: 259

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: 4780

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: 232

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: 57

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: 90

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: 11
Views: 304

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: 163

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: 345

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: 11
Views: 304

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: 220

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: 188

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: 134

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: 232

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: 11
Views: 304

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...
by omegaman477
Mon May 13, 2019 10:47 pm
Forum: Automation, sensing and robotics
Topic: Controlling IoT devices
Replies: 1
Views: 153

Re: Controlling IoT devices

The device you are looking at, if the Amazon link is correct is a ZigBee to RPI gateway/bridge. I assume it has its own I2C/SCA protocol to talk to the RPI, maybe even serial, its not clear from the add. I assume you will be using a number of off the shelf ZigBee Thermometers, and reading them over ...
by omegaman477
Mon May 13, 2019 10:40 pm
Forum: Automation, sensing and robotics
Topic: Soldering jumper wires to solenoid valve
Replies: 8
Views: 273

Re: Soldering jumper wires to solenoid valve

Put a decent electrolytic capacitor between the +12VDC power rail and ground, close to the FET (observe polarity) say 50VDC/1000uF. The solenoid will have a huge inrush current which could collapse the power rail enough to spike out the RPI. Testing with a globe is fine, but remember the solenoid is...
by omegaman477
Mon May 13, 2019 10:33 pm
Forum: Automation, sensing and robotics
Topic: Using PWM with Sabertooth motor controller
Replies: 8
Views: 186

Re: Using PWM with Sabertooth motor controller

Its really hard to debug software PWM's without being able to inspect the output waveform with an Oscilloscope. Reading up on the Sabertooth 25x2, it can be driven several ways. Its not clear from your post what mode are you using. Are you using the PWM to generate an analogue signal, and the Sabert...
by omegaman477
Mon May 13, 2019 5:46 pm
Forum: Automation, sensing and robotics
Topic: Monitoring machine status
Replies: 2
Views: 125

Re: Monitoring machine status

Hello guys. Firstly I would like to be known that I am complete beginner in Raspberry Pi. So what I would like to do is monitor my cnc machines status. Every machine has a light tower. Green for machine has finished the process, blinking yellow for machine is working and red for machine has stopped...
by omegaman477
Mon May 13, 2019 5:43 pm
Forum: Automation, sensing and robotics
Topic: My temp sensor ds18b20 doesn't seems accurate
Replies: 14
Views: 333

Re: My temp sensor ds18b20 doesn't seems accurate

Any good ways to verify the real temp with quite good accuracy? I mean, besides a $50000 unit lol Boiling water and ice in distilled water, compensate for your altitude, there are online calculators. But I would bet your only reading the top 9 bits and calculating against that, rather than the full...

Go to advanced search