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by mikronauts
Mon Jul 13, 2020 3:25 am
Forum: Python
Topic: Raspberry PI reading data from SCADA
Replies: 2
Views: 85

Re: Raspberry PI reading data from SCADA

Without knowing which scada system, which plc (and supported communication protocol) amount of data per second you wish to read you question in basically meaningless. fyi, unless you are an experienced programmer with experience in industrial environments, definitely do not try to control the plc .....
by mikronauts
Fri Jul 10, 2020 6:40 pm
Forum: Advanced users
Topic: Cluster Question
Replies: 4
Views: 168

Re: Cluster Question

A string of ws2812 led's just needs one pin... Hello! I have a fun project going that requires a lot of LEDs and I'm not in the mood to do more Charlie-plexing, so I was wondering if anyone who has done a Pi Cluster was able to control the GPIO pins on both machines? I was hoping that by linking the...
by mikronauts
Thu Jul 09, 2020 6:01 pm
Forum: Graphics, sound and multimedia
Topic: How to configure the composite video output to a 7" LCD?
Replies: 12
Views: 282

Re: How to configure the composite video output to a 7" LCD?

fyi, it is 1440/3 pixels as they count r, g, and b separately. Hello Pi-Fans, I have a 7" LCD color monitor with 1440 x 234, PAL/NTSC, 16:9 in my camper and want to use it for my Raspberry Pi 3B+. And I already have (the right) cable and connected it (composite video output of the pi to cinch input ...
by mikronauts
Thu Jul 09, 2020 5:53 pm
Forum: Automation, sensing and robotics
Topic: Attempting to install RoboPi driver
Replies: 3
Views: 131

Re: Attempting to install RoboPi driver

Thank you for the help :) My forum is inactive because for a few years now there are between 100..400 attempted spammer registrations per day even with the phpbbs anti-spammer defenses active. Welcome to the Raspberry Pi forums Hello, I am (attempting) to install the RoboPi driver on a Raspberry Pi ...
by mikronauts
Thu Jul 09, 2020 5:51 pm
Forum: Automation, sensing and robotics
Topic: Attempting to install RoboPi driver
Replies: 3
Views: 131

Re: Attempting to install RoboPi driver

Hi, The eeprom has the RoboPi firmware pre-loaded, you just need to install the python library from RoboPiLib3zip. There is also a user manual on the product page. Make sure your serial port is enabled. Best Regards, Bill p.s. Spin/eeprom files are not needed for assembled&tested or 'full kit' robop...
by mikronauts
Wed Jun 17, 2020 6:06 pm
Forum: Advanced users
Topic: ESP01 WiFi for Raspberry Pi
Replies: 2
Views: 181

Re: ESP01 WiFi for Raspberry Pi

Bad idea, not impossibe but would be ridiculosly slow as it would have to connect esp01 serial port to pi serial port, and use slip.
by mikronauts
Fri Jun 05, 2020 5:07 pm
Forum: Wanted
Topic: Consultant Needed - Need large I/O with Pi 4
Replies: 10
Views: 767

Re: Consultant Needed - Need large I/O with Pi 4

Good illustration, very helpful. Question: 1. one-off for your use, cheapest development cost or 2. prototype for production, lowest production cost You can contact me direcly at gmail, the address is my username here at gmail dot com. (I have over 35 years of development and design experience) Here...
by mikronauts
Tue Jun 02, 2020 11:47 pm
Forum: Networking and servers
Topic: Raspberry Pi 1 as NAS?
Replies: 15
Views: 637

Re: Raspberry Pi 1 as NAS?

65MBytes per second is impossible with 100Mbit Ethernet. Hi folks, I've got a few external HDD's laying around with movies, music, pictures etc. on them. I want to set up a very cheap budget NAS with these and one obvious choise was to use a Raspberry Pi as the workhorse. Since I'm on a budget, I'm ...
by mikronauts
Thu May 28, 2020 2:03 pm
Forum: General discussion
Topic: Why release an 8gb model without upgrading the processor?
Replies: 35
Views: 2474

Re: Why release an 8gb model without upgrading the processor?

Because the extra 4GB is very helpful for some applications, even without additional processor speed. If you can't use the extra memory, don't buy one. I just preface this by saying I am a huge raspberry pi fan and have bought every iteration of it and use it constantly. My complaint below is nothin...
by mikronauts
Mon May 18, 2020 2:39 pm
Forum: Automation, sensing and robotics
Topic: Controlling a large number of solenoids
Replies: 2
Views: 208

Re: Controlling a large number of solenoids

mcp23017 has 16 io's each, so 20 will give you 320 io's you need to look up the specs of the solenoids to see how much current you need at what voltage, so yo know if you need unl2004's (8 drivers per chip), L293d (4 drivers per chip) or L298 (2 per chip) The wiring would be an insane mess, so one p...
by mikronauts
Sat May 16, 2020 11:46 pm
Forum: Automation, sensing and robotics
Topic: Controlling multiple (maybe 100) stepper motors
Replies: 40
Views: 1793

Re: Controlling multiple (maybe 100) stepper motors

in my experience, when a poster won't explain what they are trying to do, it is one of:

1) commercial project
2) assignment for school
3) they don't really know
PiGraham wrote:
Mon May 11, 2020 11:23 am
Whay won't you explain the problems you are trying to solve?
Why can't you use servos?
by mikronauts
Tue May 12, 2020 8:39 pm
Forum: HATs and other add-ons
Topic: Motor Shield For Raspberry Pi 4
Replies: 6
Views: 582

Re: Motor Shield For Raspberry Pi 4

just get an L298 module.
by mikronauts
Sat May 09, 2020 2:13 pm
Forum: Automation, sensing and robotics
Topic: Controlling multiple (maybe 100) stepper motors
Replies: 40
Views: 1793

Re: Controlling multiple (maybe 100) stepper motors

thank you :) Some information that would allow people to help you more: 1. what size and weight are the grey tiles 2. do you need 360 full turns or a 180 swing is enough 3. how fast must the tiles turn 4. do you need to know the tile angle for repeatability 5. must the turning of the tiles be synch...
by mikronauts
Sat May 09, 2020 2:11 pm
Forum: Automation, sensing and robotics
Topic: Controlling multiple (maybe 100) stepper motors
Replies: 40
Views: 1793

Re: Controlling multiple (maybe 100) stepper motors

thank you :) Some information that would allow people to help you more: 1. what size and weight are the grey tiles 2. do you need 360 full turns or a 180 swing is enough 3. how fast must the tiles turn 4. do you need to know the tile angle for repeatability 5. must the turning of the tiles be synchr...
by mikronauts
Fri May 08, 2020 11:35 pm
Forum: Automation, sensing and robotics
Topic: Controlling multiple (maybe 100) stepper motors
Replies: 40
Views: 1793

Re: Controlling multiple (maybe 100) stepper motors

based on OP's posts, and some educated guesses, he may be trying to control the rotation of 100 grey squares in a 10x10 pattern, see https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=248892&p=1519706#p1519706 his reference to dmx suggests he is either a DJ or visual artist. he wants the displa...
by mikronauts
Wed May 06, 2020 10:40 pm
Forum: Troubleshooting
Topic: AD/DA Board incompatible with display
Replies: 2
Views: 145

Re: AD/DA Board incompatible with display

You can't, too many pins (including spi) are used by both boards. Simplest solution wound be to move the adc board to a pi0 and connect the pi's via wifi (or even serial) Good day gentlemen. I have some questions with my Raspberry pi 2B v1.1. I have expansion board https://www.waveshare.com/wiki/Hig...
by mikronauts
Tue Apr 21, 2020 6:28 pm
Forum: Other projects
Topic: Long term powering of Raspberry pi 4B in remote forest
Replies: 34
Views: 1863

Re: Long term powering of Raspberry pi 4B in remote forest

Ok, makes sense. I wonder if a Pi 0 could handle it? It may depend on the maximum number of cars per minute. If the OP only cares about number of cars, a photo interrupter (or two) would need less resources (and be less of a privacy issue) In another reply you mentioned APLR, is this what you meant?...
by mikronauts
Tue Apr 21, 2020 3:19 pm
Forum: Other projects
Topic: Long term powering of Raspberry pi 4B in remote forest
Replies: 34
Views: 1863

Re: Long term powering of Raspberry pi 4B in remote forest

What is the Pi to be used for? FYI, choosing the solution (pi) before knowing how to solve the problem (exactly what needs to be done) is the wrong approach. In another reply you mentioned APLR, is this what you meant? https://www.acronymfinder.com/Annual-Pollutant-Loading-Rate-(APLR).html The appro...
by mikronauts
Mon Apr 20, 2020 3:07 am
Forum: Troubleshooting
Topic: Raspberry PI 4 - Not Getting Gigabit Speeds
Replies: 15
Views: 682

Re: Raspberry PI 4 - Not Getting Gigabit Speeds

Is this the version you are using? https://www.speedtest.net/apps/cli Is the pc on the same network, connected to the same switch as the pi? did you try speedtest-cli on the pc? Try a C version of speedtest on the Pi, python is inherently slower. How do I find a C version? I ran this but it returns ...
by mikronauts
Mon Apr 20, 2020 1:55 am
Forum: Troubleshooting
Topic: Raspberry PI 4 - Not Getting Gigabit Speeds
Replies: 15
Views: 682

Re: Raspberry PI 4 - Not Getting Gigabit Speeds

Try a C version of speedtest on the Pi, python is inherently slower.
by mikronauts
Sat Apr 18, 2020 2:06 pm
Forum: Beginners
Topic: Invalid EXE
Replies: 11
Views: 557

Re: Invalid EXE

If you want an even bigger headache, try APL... Stick with C, it's less of a pain in the tail than PL/I. Boggle.... PL/1 was a sort of hybrid of FORTRAN and COBOL that was influenced by ALGOL. Lol. I categorized C and PL/1 to both be pains in the tail. Coding styles had nothing to do with this. Abst...
by mikronauts
Sat Apr 18, 2020 1:20 am
Forum: General programming discussion
Topic: Sampling RGB display output using GPIOs
Replies: 1
Views: 247

Re: Sampling RGB display output using GPIOs

sorry, no https://info-coach.fr/atari/hardware/video.php try to find an old tube multisync, or a good vga to hdmi converter I have an Atari 1040ST that I'm having trouble finding a monitor for. My LCD displays with VGA input aren't happy with the signals translated with the cable I have. I had an id...
by mikronauts
Thu Apr 16, 2020 6:52 pm
Forum: Other projects
Topic: Medical Facility needs help with UVC sensor / script
Replies: 14
Views: 1078

Re: Medical Facility needs help with UVC sensor / script

Good find! Definitely a good alternative to DIY. I am still going to look into this some more, wifey likes the idea of sterilizing our masks (used for shopping and in elevators) quicker then leaving them in the sun for days. So far the biggest issues (some mentioned above) are the dangers of UV-C, "...

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