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by IOTON
Sat Aug 24, 2019 6:16 am
Forum: Other projects
Topic: Controling very narrow Laminer flow / water jets
Replies: 13
Views: 265

Re: Controling very narrow Laminer flow / water jets

You can use new or used(ask in car repair) fuel injectors for this task. But, you need to remember, different injectors(different models) have slightly different open-close time, and you will need to play with timings. https://a.d-cd.net/41d4b38s-480.jpg Or solenoids from a washing machine,(around 8...
by IOTON
Fri Aug 23, 2019 9:47 am
Forum: Automation, sensing and robotics
Topic: RaspiPool. A Swimming Pool Automation System
Replies: 3
Views: 103

Re: RaspiPool. A Swimming Pool Automation System

Hmm This project smells a bit fishy :roll: Sorry - on a more serious note we have a major problem around here with hardness of water (due to the local source being under a clay layer then chalk beds). This can clog up pipes / joints etc very quickly and some folk have 'all house' softeners. I was j...
by IOTON
Fri Aug 23, 2019 9:22 am
Forum: Other projects
Topic: Automated Truck weight measurement with Raspberry PI
Replies: 3
Views: 155

Re: Automated Truck weight measurement with Raspberry PI

Some measurement of sensor and ADC noise. 500 counts noise video: https://youtu.be/v4fTnnufzNQ https://i.yapx.ru/FFYWC.png As you can see, I have around 120 counts of noise Peak-to-Peak. Lets calculate the noise-free counts... 24bit = 2^24 = 16 177 216 counts. The noise of my system = 120 counts. So...
by IOTON
Fri Aug 23, 2019 9:14 am
Forum: Other projects
Topic: Noob needs help with barcode-activated camera system
Replies: 5
Views: 94

Re: Noob needs help with barcode-activated camera system

Try to do it step by step. But I think, w/o any programming skils it's not so possible. Got it! So I did more research and believe that I will need to use the native pi camera. From what I understood, I need to write a script that will allow me to capture video. Then, I need to write a script that ...
by IOTON
Thu Aug 22, 2019 8:13 pm
Forum: Other projects
Topic: Noob needs help with barcode-activated camera system
Replies: 5
Views: 94

Re: Noob needs help with barcode-activated camera system

Try to do it step by step. But I think, w/o any programming skils it's not so possible.
by IOTON
Thu Aug 22, 2019 6:07 am
Forum: Other projects
Topic: Automated Truck weight measurement with Raspberry PI
Replies: 3
Views: 155

Re: Automated Truck weight measurement with Raspberry PI

For outdoor usage(in real life truck weight scales mainly used outdoors) I need to make some tests. At first, my device must take a bath. I can't do complete IP68 test right now, but I will do it later. (on pics you can see my Load cell - Modbus converter (1,2,3,4,5,6 see the previous post) in the s...
by IOTON
Mon Aug 19, 2019 11:26 am
Forum: Other projects
Topic: Automated Truck weight measurement with Raspberry PI
Replies: 3
Views: 155

Re: Truck weight measurements with Raspberry PI

TEST SETUP hardware: https://i.yapx.ru/FDVYF.png 1, 2, 3, 4, 5, 6. Independent weight scales. Each consists of the load cell and Load cell - Modbus converter (PCB w/o housing) 7. DIN enclosure with Raspberry PI3 B+ inside. 8. IOTON PI-FACE (my interface for Raspberry PI with RS485, RTC, UPS, power c...
by IOTON
Sun Aug 18, 2019 8:40 pm
Forum: Other projects
Topic: Automated Truck weight measurement with Raspberry PI
Replies: 3
Views: 155

Automated Truck weight measurement with Raspberry PI

I'm developing an automated truck weight measurement system based on Raspberry PI. What I expected from this system: 1. Truck license plate recognition. 2. Search truck data in the database. 3. Automatically put truckload data to the UI. 4. Show overload/underload info in the UI. 5. Show each axle b...
by IOTON
Mon Jul 15, 2019 7:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RPI3 DMA for the SPI
Replies: 9
Views: 466

Re: RPI3 DMA for the SPI

I do not understand. You want to send data to a DAC. The data must be between 0x3000 and 0x3FFF. The data must be based on a sine wave. So the maximum will be 0x3FFF, the minimum 0x3000. Where does DMA come into this? How many values do you want to transfer per second? Is each value a single 16-bit...
by IOTON
Mon Jul 15, 2019 7:13 pm
Forum: General discussion
Topic: Usefull / good programs to have on your Pi
Replies: 22
Views: 1300

Re: Usefull / good programs to have on your Pi

apt-get install mc

back to 1993(for me)
by IOTON
Mon Jul 15, 2019 6:43 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RPI3 DMA for the SPI
Replies: 9
Views: 466

Re: RPI3 DMA for the SPI

I think it's not so simple.

A better way to use a microcontroller for tasks like this.
by IOTON
Mon Jul 15, 2019 6:00 pm
Forum: General discussion
Topic: I didn't think the usb c power thing was a big deal...
Replies: 92
Views: 4936

Re: I didn't think the usb c power thing was a big deal...

4k 60hz is great

I use 42 inch 4k LG computer monitor for work(CAD, big assemblies 500+ parts) and can't return to 30hz after I've seen 60hz.
by IOTON
Mon Jul 15, 2019 5:39 pm
Forum: General discussion
Topic: Want to measure battery volts
Replies: 38
Views: 1634

Re: Want to measure battery volts

I appreciate all help. I have a basic question: Can I read individual batteries which are serial connected to each other? What I understand from this drawing is this is fine: https://imgur.com/LN99Wux Just want to be sure about it. Thanks & regards, Ertan To measure with schematic like this you wil...
by IOTON
Mon Jul 15, 2019 1:55 pm
Forum: Русский
Topic: Выход Raspberry PI 4 в России в продажу
Replies: 2
Views: 655

Re: Выход Raspberry PI 4 в России в продажу

Если официально возить будут, то дорого очень будет. Только доставка, таможенные платежи и НДС добавят к EXW цене процентов 40, если не больше... а ещё и продавану что то заработать надо... как то так.

А в серую и сейчас возят.
by IOTON
Mon Jul 15, 2019 11:20 am
Forum: General discussion
Topic: Simple Infra-Red record/playback
Replies: 56
Views: 9633

Re: Simple Infra-Red record/playback

okaaayy. Thank you now i understand. :) also different ir remotes have different frequencies, but lirc library works with most of it. The only problem you get with this library - is if you will want to control HVAC. HVAC remote send long set of commands every time you push any button. Is there a wa...
by IOTON
Mon Jul 15, 2019 7:46 am
Forum: Troubleshooting
Topic: motioneye
Replies: 12
Views: 328

Re: motioneye

transatlantic wrote:
Sun Jul 14, 2019 5:26 pm
I have just tried it with my USB power bank, which says it can supply up to 2.1A

Same thing :x :x :roll:
Change your USB cable. With bad cable, voltage might drop more than 1 volt on 2amp load.
by IOTON
Mon Jul 15, 2019 7:18 am
Forum: Automation, sensing and robotics
Topic: Using Adafruit's Peristaltic Liquid Pump with the Pi
Replies: 9
Views: 437

Re: Using Adafruit's Peristaltic Liquid Pump with the Pi

It's a bad manner to make circuits like this(led in series with optocoupler input). Only words I can say. The good manner to place led on optocoupler output. This circuit will work with 3x - 5x input voltage difference (depends on optocoupler and resistors power dissipation), also it will indicate ...
by IOTON
Mon Jul 15, 2019 7:11 am
Forum: General discussion
Topic: Simple Infra-Red record/playback
Replies: 56
Views: 9633

Re: Simple Infra-Red record/playback

also if we are recording the signal as it is , why does it needs to be sent 3 times. it's error protection. we are not recording signal as is, we decode it and save it in the form of bits. okaaayy. Thank you now i understand. :) also different ir remotes have different frequencies, but lirc library...
by IOTON
Mon Jul 15, 2019 7:04 am
Forum: General discussion
Topic: Want to measure battery volts
Replies: 38
Views: 1634

Re: Want to measure battery volts

I was also thinking about the effective voltage range that you are going to measure on each battery. I am thinking that if the 12V battery drops to 6V, it will be in deep cycle. Also, open circuit measurement of a 12V battery can be as high as 13V. Maybe your effective measurement range would be be...
by IOTON
Mon Jul 15, 2019 6:53 am
Forum: Other projects
Topic: ADS1115 is not detected by i2c
Replies: 9
Views: 899

Re: ADS1115 is not detected by i2c

Hi, Now used hat version of ADS1115. Mounted it directly on top of a Pi, but result the same. No device found. -- Hat version of ADS1115: https://ru.aliexpress.com/item/32824203283.html try it on fresh install raspbian and i2c tools. try to set another address try any other device on i2c pins (does...
by IOTON
Mon Jul 15, 2019 6:44 am
Forum: Other projects
Topic: non programmer needs to build an all inclusive pool controller
Replies: 15
Views: 809

Re: non programmer needs to build an all inclusive pool controller

So, I have been playing around with Node red a little. I can get dashboards up and receiving data foam a temp/Humidity sensor after watching a YouTube tutorial. it works alright but a little locked at the dashboard. i really want to be able to customize the dashboard with a background picture of my...
by IOTON
Mon Jul 15, 2019 6:22 am
Forum: Automation, sensing and robotics
Topic: Using Adafruit's Peristaltic Liquid Pump with the Pi
Replies: 9
Views: 437

Re: Using Adafruit's Peristaltic Liquid Pump with the Pi

Just be aware that many of these relay boards were designed for the Arduino and don't work correctly with the 3.3v gpio of the pi. Optocouplers on those boards have high CMR, therefore, a voltage difference between 5v and 3.3v doesn't matter in this case. Have you ever read the sticky on why many o...
by IOTON
Mon Jul 15, 2019 6:02 am
Forum: General discussion
Topic: Want to measure battery volts
Replies: 38
Views: 1634

Re: Want to measure battery volts

Just add correct resistor dividers.
Also, you will need a rectifier diode for AC voltage measurements.
by IOTON
Mon Jul 15, 2019 5:58 am
Forum: General discussion
Topic: Designing real electrical car
Replies: 13
Views: 608

Re: Designing real electrical car

It's not so simple. You will need to learn: 1. Power electronics 2. Signals and systems. 3. MCU principles and programming 4. Motor control principles (FOC etc). ........ and more and more and more. it's assumed you already know physics and math Solving simple problems - the best way to start. I rec...

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