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by wh7qq
Mon Apr 13, 2020 1:31 am
Forum: General discussion
Topic: Waveshare 4inch touchscreen driver issue?
Replies: 1
Views: 109

Re: Waveshare 4inch touchscreen driver issue?

Forget the Chinese image and follow the wiki instructions on installing the drivers. Older distros before the 4B arrived do not fully support your computer. You need a fresh copy of Buster.
by wh7qq
Sun Apr 12, 2020 4:13 am
Forum: General discussion
Topic: Best OS for raspberry pi as a everyday desktop?
Replies: 50
Views: 14952

Re: Best OS for raspberry pi as a everyday desktop?

It is hardly an either/or proposition. For the minimal cost of an SD card and a bit of your time, you can try them all and see what you like. You will probably wind up with Raspbian but you may not be confident in that choice if you don't try some additional options..."paranoia strikes deep!"
by wh7qq
Sat Apr 11, 2020 5:50 pm
Forum: General discussion
Topic: Raspberry Pi Smart Toilet.
Replies: 4
Views: 314

Re: Raspberry Pi Smart Toilet.

Stanford has really "gone down the tubes" to a new low. It used to be a proud institution...home of Dave Packard and Bill Hewlett and heavily endowed by the pair. Now...
by wh7qq
Fri Apr 10, 2020 8:10 pm
Forum: General discussion
Topic: Help with the project
Replies: 5
Views: 363

Re: Help with the project

If you back out to the home page of the above link (your post) you will see entries for the GPIO and HDMI displays for the RPi. It is probably pretty similar, at least to try out. I got the MHS series display and it works ok except for the size and resolution but using VNC, the display can be expand...
by wh7qq
Fri Apr 10, 2020 7:20 pm
Forum: General discussion
Topic: Pi4b with Hyperpixil TFT display
Replies: 11
Views: 552

Re: Pi4b with Hyperpixil TFT display

I use a display on my 3B and it stays cool with the arctic silver epoxied heat sinks and an exposed (no case), on its side position. The GPIO pins do not require full height connections. You can (carefully) solder or use wire wrap to connect to them. The fan can blow from the side. Not necessarily p...
by wh7qq
Thu Apr 09, 2020 1:51 am
Forum: General discussion
Topic: Turn off HDMI to reduce power consumption
Replies: 2
Views: 278

Re: Turn off HDMI to reduce power consumption

I don't recall exactly what I did to disable the HDMI but I have a zero W headless and it's desktop image on VNC is dark...can't load it to the remote desktop. The IP address is there but the image is dark. It runs the Raspbian Desktop version but I think "x11" is disabled. Sloppy habit...I tend to ...
by wh7qq
Mon Apr 06, 2020 7:41 pm
Forum: General discussion
Topic: VNC Viewer
Replies: 2
Views: 172

Re: VNC Viewer

VNC server should share the same IP address shown in "ifconfig" on the RPi. VNC viewer on your laptop should list/show all the available VNC servers and you select the appropriate IP in viewer and from the drop down menu, select "connect". If for any reason the server is unavailable, its thumbnail v...
by wh7qq
Thu Apr 02, 2020 9:34 pm
Forum: General discussion
Topic: Raspberry Pi 1 - TP-Link wireless USB adapter
Replies: 1
Views: 99

Re: Raspberry Pi 1 - TP-Link wireless USB adapter

Search on this forum for Mr. Engman or TPlink and you should find instructions. I put my TP link usb dongle in the trash because following instructions for building and loading the driver were more time and trouble than the dongle was worth to me but YMMV. My advice is to frisbee the thing and get a...
by wh7qq
Thu Apr 02, 2020 3:49 am
Forum: General discussion
Topic: How to setup wifi connect
Replies: 19
Views: 929

Re: How to setup wifi connect

The password being required is actually a router requirement. Either by factory default or by setting in the router configuration GUI, security/encryption has been selected and Raspbian in turn requires it as well. It is for your protection. You must create a unique and hopefully complex password an...
by wh7qq
Sun Mar 29, 2020 9:11 pm
Forum: General discussion
Topic: Power Bank for my emulator
Replies: 2
Views: 170

Re: Power Bank for my emulator

@Tommy, Similar questions have been asked many times and there are myriad power banks on the market with various characteristics but to help you, we would need to know how long you expect it to run, what accessories do you have attached such as USB devices, what sort of charging method or do you exp...
by wh7qq
Sun Mar 29, 2020 8:48 pm
Forum: Off topic discussion
Topic: Could the raspberry pi be used to control a ventilator?
Replies: 8
Views: 3219

Re: Could the raspberry pi be used to control a ventilator?

It is possible to kill with a ventilator and its possible to recover from viral/bacterial pneumonia. Take your pick. Keep your hacked ventilators away from me and mine. It's a nice idea but best pursued by engineers experienced in ventilator design and construction.
by wh7qq
Sun Mar 29, 2020 8:43 pm
Forum: General discussion
Topic: How to create a static ip address
Replies: 5
Views: 448

Re: How to create a static ip address

The easy way is to set it up in your router.
by wh7qq
Sun Mar 29, 2020 3:57 am
Forum: General discussion
Topic: Water tank level monitoring. Skill level required?
Replies: 10
Views: 821

Re: Water tank level monitoring. Skill level required?

Many years ago, I ran a hemodialysis center that had a 1K gal. storage tank for pure water from an RO machine that ran all night. It used a set of reed relays inside a sealed long poly tube, activated by a donut shaped magnet that rode on the outside of the poly tube with a float. An RPi could easil...
by wh7qq
Sun Mar 29, 2020 3:38 am
Forum: General discussion
Topic: Turn Lights on and off based off schedule
Replies: 11
Views: 562

Re: Turn Lights on and off based off schedule

Quit trying to do it the hard way and just use cron.
by wh7qq
Thu Mar 26, 2020 4:36 pm
Forum: General discussion
Topic: Anyone using Timeshift backup
Replies: 5
Views: 340

Re: Anyone using Timeshift backup

Timeshift works very well on x86 machines but AFAIK, has not been ported to arm processors. I have it on Mint and it is easy to set up and use and it runs in the background. It is best to have a separate, removable storage location so that backups aren't lost along with the working disk.
by wh7qq
Thu Mar 26, 2020 3:57 am
Forum: General discussion
Topic: Raspberry Pi for power monitoring
Replies: 4
Views: 276

Re: Raspberry Pi for power monitoring

There are a number of current transformers on the market for various current levels. They generally produce an analog voltage so that an AD converter is necessary. Something on the order of an Arduino or NodeMCU would provide built-in AD. In all cases, additional circuitry is required. The Open Ener...
by wh7qq
Mon Mar 23, 2020 11:28 pm
Forum: General discussion
Topic: Brainstorming using the raspberry pi to make a generic respirator
Replies: 13
Views: 1478

Re: Brainstorming using the raspberry pi to make a generic respirator

That's a poor choice of wording. "burden" appears to imply you'd prefer an unregulated industry. The implication is entirely yours...I suggested no such thing. The use of the term "burden" is to indicate that it is entirely up to the manufacturer to do the testing and make the application for appro...
by wh7qq
Mon Mar 23, 2020 6:53 pm
Forum: General discussion
Topic: Brainstorming using the raspberry pi to make a generic respirator
Replies: 13
Views: 1478

Re: Brainstorming using the raspberry pi to make a generic respirator

Modern ventilators are the result of decades of experience and extensive testing and a lot of biomedical engineering expertise. They provide the practitioners with extensive versatility in tailoring the action to the patient's needs and condition. Volume, pressure, flow rate, gas percentage and othe...
by wh7qq
Wed Mar 18, 2020 3:06 am
Forum: General discussion
Topic: Help with higher uptime
Replies: 6
Views: 487

Re: Help with higher uptime

[quote=putz182 post_id=1628148 time=1584493089 user_id=3281 I'm considering using a 5V UPS. There are some shields for RPi, but I was considering something costless. If I plug a power back over USB, will it act as a power bank? [/quote] Most of the "5v" power banks out there are not regulated as nec...
by wh7qq
Sun Mar 15, 2020 7:10 pm
Forum: General discussion
Topic: Help with higher uptime
Replies: 6
Views: 487

Re: Help with higher uptime

Just a shot in the dark...check to see if you have enabled the "wait for network" feature in raspi-config. I had a headless RPi (B+ with Edimax dongle) that was supposed to run 24/7 but if the network was down, would never come back up as the wireless connection was not restarting. In any case, a lo...
by wh7qq
Thu Mar 12, 2020 7:35 pm
Forum: General discussion
Topic: Raspberry Pi GPIO and 12v supply
Replies: 10
Views: 720

Re: Raspberry Pi GPIO and 12v supply

Thank you for the input as well. My final questions are, is there anyway to physically determine if the Pi 4B is dead or not, and if it is dead what are the chances that my SD card was compromised? The Pi has a very faint blinking red light and no green light at all You can test the integrity of th...
by wh7qq
Wed Mar 11, 2020 8:12 am
Forum: General discussion
Topic: Raspberry Pi GPIO and 12v supply
Replies: 10
Views: 720

Re: Raspberry Pi GPIO and 12v supply

I beg to differ with Milliways, having used these boards with the RPi B and Zero, Arduino and esp8266-12E boards. The schematic for the 4 channel board is at http://wiki.sunfounder.cc/index.php?title=4_Channel_5V_Relay_Module . They work fine but have to be hooked up correctly. I leave it to the stu...
by wh7qq
Mon Mar 09, 2020 7:42 pm
Forum: General discussion
Topic: Hplip
Replies: 9
Views: 653

Re: Hplip

fruitoftheloom wrote:
Mon Mar 09, 2020 7:10 pm
Follow instructions on hplip website and manually install:

https://developers.hp.com/hp-linux-imag ... g/gethplip
Probably the best advice yet: get the latest direct from HP, but do upgrade your distro to Buster.
by wh7qq
Mon Mar 09, 2020 6:18 pm
Forum: General discussion
Topic: Hplip
Replies: 9
Views: 653

Re: Hplip

First off, you should upgrade to Raspbian Buster. I just checked and apt-cache policy hplip hplip: Installed: 3.18.12+dfsg0-2+b1 Candidate: 3.18.12+dfsg0-2+b1 Version table: *** 3.18.12+dfsg0-2+b1 500 500 http://raspbian.raspberrypi.org/raspbian buster/main armhf Packages 100 /var/lib/dpkg/status So...

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