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by W. H. Heydt
Wed Sep 18, 2019 10:19 pm
Forum: General discussion
Topic: Security - Best Practices
Replies: 3
Views: 73

Re: Security - Best Practices

We are wanting to use these at an intake area, those will perform different functions but I need to start looking into best security practices since it will be "public" facing. All bets are off if there is physical access to the machine. Even that can be mitigated to a degree. Besides booting over ...
by W. H. Heydt
Wed Sep 18, 2019 8:37 pm
Forum: Beginners
Topic: RPI4 connected to a TV
Replies: 4
Views: 51

Re: RPI4 connected to a TV

Just going to ask a stupid question... Are you using the HDMI0 port on the Pi4B?
by W. H. Heydt
Wed Sep 18, 2019 5:23 pm
Forum: General discussion
Topic: Power over Ethernet and Fan
Replies: 9
Views: 163

Re: Power over Ethernet headed

I suppose someone could design a HAT or other add-on board that would take power from those pins and convert it to something a fan could run on, but it would still only work if the Pi was connected to a PoE switch. "Someone" already has. "Someone" is RPT, and it's called the Raspberry Pi PoE HAT. :...
by W. H. Heydt
Wed Sep 18, 2019 4:01 pm
Forum: Advanced users
Topic: Moving the microSD Card between RPi Zero W and RPi Zero
Replies: 7
Views: 101

Re: Moving the microSD Card between RPi Zero W and RPi Zero

spaceman5 wrote:
Wed Sep 18, 2019 2:14 pm
Amazing work by Raspbian OS Developers.


Compare that to windows... :shock:
Yeah...funny thing about that. The Raspbian team is, of course, building on the work of Linux devs. Shows you the power of open source software.
by W. H. Heydt
Wed Sep 18, 2019 3:37 pm
Forum: General discussion
Topic: Power over Ethernet and Fan
Replies: 9
Views: 163

Re: Power over Ethernet headed

To the best of my knowledge, no. Those pins are for picking off PoE power (24v to 48v), and--therefore--even if PoE is being supplied, the voltage would be wrong for most fans. That said, I suppose someone could design a HAT or other add-on board that would take power from those pins and convert it ...
by W. H. Heydt
Wed Sep 18, 2019 5:18 am
Forum: General discussion
Topic: Raspberry Pi and Fotek SSR-25
Replies: 4
Views: 106

Re: Raspberry Pi and Fotek SSR-25

There is a limit of (IIRC) 16mA for any given GPIO pin. GPIO pins operate at 3.3v. The power that can be supplied may be too low to actuate your relay coil. Best bet would probably be to use a transistor as a switch to supply 5v to the relay coil. That is, wire the GPIO pin to the base of the transi...
by W. H. Heydt
Wed Sep 18, 2019 2:53 am
Forum: Off topic discussion
Topic: A modest (passive) suggestion
Replies: 10
Views: 335

Re: A modest (passive) suggestion

It is not a trivial matter to add even a single pin. The tracks in all 6 layers of the circuit board would have to be rerouted around the pin hole. I didn't say it was. An alternative would be far worse, though. That would be moving one of the existing 5v well away from the other. That would make a...
by W. H. Heydt
Wed Sep 18, 2019 12:31 am
Forum: Off topic discussion
Topic: A modest (passive) suggestion
Replies: 10
Views: 335

Re: A modest (passive) suggestion

Gavinmc42 wrote:
Tue Sep 17, 2019 11:29 pm
One extra pin at the 3 pin header Run/Enable location?
There would be a risk of someone shorting the pins?
People short the existing pins, so I wouldn't see you (quite elegant) solution noticeably increasing the risks to a Pi.
by W. H. Heydt
Wed Sep 18, 2019 12:27 am
Forum: General discussion
Topic: Back Voltage from USB Hub
Replies: 14
Views: 412

Re: Back Voltage from USB Hub

I didnt have to supply power to the Pi, merely plugging a powered hub into the USB socket of the Pi powered it up. Did you connect the hub using one of the output ports (in which case, the behavior is expected for the Pi you've indicated), or was it by connecting the hub's uplink connection? The fo...
by W. H. Heydt
Tue Sep 17, 2019 11:23 pm
Forum: General discussion
Topic: Installing Visual Studio Code
Replies: 10
Views: 251

Re: Installing Visual Studio Code

If I'm not mistaken, Visual Studio is a Microsoft product for MS Windows. As such, it is written for a different operating system that run on a different--and incompatible--hardware architecture.
by W. H. Heydt
Tue Sep 17, 2019 8:19 pm
Forum: Off topic discussion
Topic: A modest (passive) suggestion
Replies: 10
Views: 335

A modest (passive) suggestion

The thermal issues with the Pi4B are sufficient that I think the use of active cooling is going to be far more common than for previous Pis, and there is no reason to think that the problem will decrease in the future. At present, there are two 5v pins in the "GPIO" block. They are placed where most...
by W. H. Heydt
Tue Sep 17, 2019 4:00 pm
Forum: Beginners
Topic: Computer monitor & Raspberry Pi 4B
Replies: 5
Views: 150

Re: Computer monitor & Raspberry Pi 4B

Another approach is the get a KVM switch. That way you can switch not only the monitor, but also the keyboard and mouse from you desktop machine to one (or more) Pis and the press of a button.
by W. H. Heydt
Tue Sep 17, 2019 2:01 pm
Forum: General discussion
Topic: Low voltage warning even though gpio being powered with 5.07V?
Replies: 11
Views: 423

Re: Low voltage warning even though gpio being powered with 5.07V?

Botspot wrote:
Tue Sep 17, 2019 1:43 pm
I understand voltage drop, but never would have thought such a short length of wire could have made a difference this bad.
"Short" is 6 inches. Those wires aren't all that short, plus--as noted--there is a join in the middle which doesn't help.
by W. H. Heydt
Tue Sep 17, 2019 1:10 am
Forum: Beginners
Topic: [SOLVED] Is this fiberglass sticking out of my Pi's PCB?
Replies: 4
Views: 152

Re: Is this fiberglass sticking out of my Pi's PCB?

A fine file or emery cloth would also work to clean up the edge.
by W. H. Heydt
Mon Sep 16, 2019 11:52 pm
Forum: Advanced users
Topic: Raspberry Pi 4 Recommended Mobile Power
Replies: 10
Views: 410

Re: Raspberry Pi 4 Recommended Mobile Power

Imperf3kt wrote:
Mon Sep 16, 2019 9:49 pm
Is there a specific reason the Pi4b must be used?
That may simply be similar to the old remark about climbing mountains...because it is there. But, then, other than a Pi3A+ (which is overkill for what it's doing), I don't use batteries to power anything past a Pi2Bv1.1
by W. H. Heydt
Mon Sep 16, 2019 11:47 pm
Forum: General discussion
Topic: Pi 3b has Pi 3b+ Broadcom wifi/bt chip?
Replies: 8
Views: 294

Re: Pi 3b has Pi 3b+ Broadcom wifi/bt chip?

it says 'made in RPC' (China), and not the UK The Pi is made in two locations (three of you count the special case of Brazil, I believe) The UK, and communist China, otherwise known as the People's Republic of China, PRC for short. They are, so far as I know, also made in Japan for that local marke...
by W. H. Heydt
Mon Sep 16, 2019 11:45 pm
Forum: General discussion
Topic: RP4 USB Battery Power - E Marked Issue
Replies: 9
Views: 361

Re: RP4 USB Battery Power - E Marked Issue

I'd suggest any powerbank of your required capacity and 2.1 Amp output capability that does NOT support USB-C PD. And use a USB to USB-C cable that is not E-marked. 2.1 Amps should be enough for a RPi4B and light current USB peripherals. 2.1A *may* be enough, but it's easy enough to find powerbanks...
by W. H. Heydt
Mon Sep 16, 2019 6:36 pm
Forum: General discussion
Topic: 7" Official Screen and Case
Replies: 6
Views: 199

Re: 7" Official Screen and Case

and it came with a case which in my error is obviously bundled by someone else, SORRY it had the same issue everyone had initially being upside down on boot which was resolved in later models, having the RPIlogo on the back I assumed offhand it was an official product. You can always reference the ...
by W. H. Heydt
Mon Sep 16, 2019 6:33 pm
Forum: General discussion
Topic: RP4 USB Battery Power - E Marked Issue
Replies: 9
Views: 361

Re: RP4 USB Battery Power - E Marked Issue

Hi all, I need to power my RP4 from a battery and I'm thinking the easiest way to start is just using a USB battery pack (such as this one https://www.amazon.com/Anker-PowerCore-13000mAh-VoltageBoost-Technology/dp/B072155XVX/ref=sr_1_5?keywords=anker+portable+charger+USB+c&qid=1568648613&s=gateway&...
by W. H. Heydt
Mon Sep 16, 2019 6:30 pm
Forum: General discussion
Topic: 7" Official Screen and Case
Replies: 6
Views: 199

Re: 7" Official Screen and Case

I believe that at least one company that makes such cases has announced the intention to make a Pi4B one, though. That would be this: https://smarticase.com/collections/all/products/smartipi-touch I'm not affiliated with them, and neither is the RPF, but I do have one of their SmartPi kits which I'...
by W. H. Heydt
Mon Sep 16, 2019 2:01 pm
Forum: General discussion
Topic: 7" Official Screen and Case
Replies: 6
Views: 199

Re: 7" Official Screen and Case

There is no RPT/RPF "official" case for the RPF 7" display. I believe that at least one company that makes such cases has announced the intention to make a Pi4B one, though.
by W. H. Heydt
Mon Sep 16, 2019 4:44 am
Forum: Beginners
Topic: HDMI to VGA
Replies: 6
Views: 101

HDMI to VGA

I have a wired VGA Monitor, which isn't getting any signal from my HDMI2VGA Adapter, so I've got you out-newbied. I read Something about using a powered converter, but Amazon doesn't seem to carry such. This matter should be a lot more obvious, than what I'm seeing. HDMI is a digital protocol. VGA ...
by W. H. Heydt
Mon Sep 16, 2019 4:40 am
Forum: Beginners
Topic: possible to create a wireless screen connection with bluetooth?
Replies: 2
Views: 133

Re: newbie questions

droid.jelly wrote:
Sun Sep 15, 2019 10:28 pm
is possible to create a wireless screen connection with bluetooth or some wireless module?
No. Calculate the bandwidth required vs. the available bandwidth available to BT.
by W. H. Heydt
Mon Sep 16, 2019 1:11 am
Forum: Beginners
Topic: Rasberry pi B unusably slow
Replies: 6
Views: 193

Re: Rasberry pi B unusably slow

My version is the "original model B" as shown in the beginner STICKY:" Getting Started with the Raspberry Pi" To be honest it's a loaner from a friend. The GPU memory change was a hail mary to see if it makes a difference. I don't know the exact specs. Anyway, besides the browser trouble, the thing...
by W. H. Heydt
Mon Sep 16, 2019 1:05 am
Forum: General discussion
Topic: Laptop speakers with Raspberry PI
Replies: 25
Views: 551

Re: Laptop speakers with Raspberry PI

qaz wrote:
Sun Sep 15, 2019 4:41 pm
The thing is that I need to put all that in a box that has like 2cm height, so I doubt that PC speakers will fit there
That is the sort of information that should have been provided at the beginning. How were we to know you had such severe space constraints?

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