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by Imperf3kt
Wed Sep 18, 2019 9:33 pm
Forum: Beginners
Topic: Step motor fails to run backwards on raspberry
Replies: 1
Views: 22

Re: Step motor fails to run backwards on raspberry

Are you using a motor controller?
For example, an L298N
by Imperf3kt
Wed Sep 18, 2019 9:31 pm
Forum: Beginners
Topic: RPI4 connected to a TV
Replies: 4
Views: 51

Re: RPI4 connected to a TV

The first time I plugged my micro hdmi cable into my Pi4b, it felt like it had seated, but was in fact not properly inserted.
A little extra force made it "click" into place and work.

Are you sure yours is pushed all the way in?
by Imperf3kt
Wed Sep 18, 2019 8:01 pm
Forum: Troubleshooting
Topic: Clock?
Replies: 12
Views: 356

Re: Clock?

Your workaround of checking that the remote time servers are available seems reasonable. My concern is that a workaround is necessary. An application (and especially a user sitting at a keyboard ) shouldn't have to first check (or risk getting a failure) that the system time is valid before running...
by Imperf3kt
Tue Sep 17, 2019 11:50 pm
Forum: Off topic discussion
Topic: A modest (passive) suggestion
Replies: 10
Views: 335

Re: A modest (passive) suggestion

I once asked for a similar consideration, for use as power in, instead of using the GPIO. Since, ultimately, the request is the same, I feel you'll probably get the same response I did. I was told I was being rude and shunned faster than you could blink. A good work around is to remove the plastic s...
by Imperf3kt
Tue Sep 17, 2019 10:38 pm
Forum: General discussion
Topic: RP4 USB Battery Power - E Marked Issue
Replies: 9
Views: 361

Re: RP4 USB Battery Power - E Marked Issue

It's not overblown, most of those powerbanks that claim 2.1A, 2.4A etc have poor regulation and cannot deliver 5v when that much current is being drawn, leading to the Pi experiencing an undervolt situation which is known to be the cause of many other strange issues including SD card corruption. I'v...
by Imperf3kt
Tue Sep 17, 2019 10:04 am
Forum: General discussion
Topic: trying to buy more than 1 pi zero
Replies: 18
Views: 477

Re: trying to buy more than 1 pi zero

IT IS NOT A JOKE, DO NOT BE SO DISRESPECTFUL TO RPF / RPT Not everybody reads the forum before to find out why they can only buy one of a product. It's not disrespectful, it's ill-informed and expecting the product be sold by basic merchant practices that have existed for millennia. I find your nee...
by Imperf3kt
Tue Sep 17, 2019 3:44 am
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?

That wire looks pretty thin and has a join in the middle.
You are likely experiencing voltage drop along its length. As above, measure the voltage at the GPIO header itself, not the power supply.
by Imperf3kt
Tue Sep 17, 2019 2:30 am
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. Why do you advise against the Power Delivery spec? It is, aft...
by Imperf3kt
Mon Sep 16, 2019 10:26 pm
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?

I'd second just rubbing it with something.

There is little to no risk of harming yourself when handling it as long as you don't run your finger down the edge.
by Imperf3kt
Mon Sep 16, 2019 10:11 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. It isn't anything to worry about, it's not a fake. The Raspberry Pi...
by Imperf3kt
Mon Sep 16, 2019 9:49 pm
Forum: Advanced users
Topic: Raspberry Pi 4 Recommended Mobile Power
Replies: 10
Views: 410

Re: Raspberry Pi 4 Recommended Mobile Power

Step 1. Determine the actual power requirement for your setup. The max power for a Pi4B is 3A @ 5v, but that includes 1.2A for USB devices. Your actual requirements may be less. Step 2. Determine the power output (W) and energy capacity (Wh) of your proposed supply. Step 3. Make sure that the outpu...
by Imperf3kt
Mon Sep 16, 2019 9:36 pm
Forum: General discussion
Topic: Laptop speakers with Raspberry PI
Replies: 25
Views: 551

Re: Laptop speakers with Raspberry PI

qaz wrote:
Mon Sep 16, 2019 5:35 pm
Will post (if anyone cares) results when I make it work.
I'd be interested to see how your project turns out.
by Imperf3kt
Mon Sep 16, 2019 9:18 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 dont know of any "battery pack" that comes with those e marked cables. So far, only high end power supplies have been reported to use them. Is there any battery pack that works with the Pi? Probably, but good luck finding it. I'd suggest looking for something with a USB-C PD port. I saw one locall...
by Imperf3kt
Sun Sep 15, 2019 11:25 pm
Forum: Beginners
Topic: Soldering
Replies: 22
Views: 464

Re: Soldering

Or you can use solder to bridge two holes next to each other. Solder your LED in, solder a wire to the hole either side of the LEDs legs, then melt some solder between to join the hole the wire is soldered to, with the hole the LED is soldered to. See some replies here for a detailed example. https:...
by Imperf3kt
Sun Sep 15, 2019 11:21 pm
Forum: Beginners
Topic: Native Youtube application for raspberry pi?
Replies: 2
Views: 118

Re: Native Youtube application for raspberry pi?

Not exactly what you're asking for, but it may work.
Have you considered Kodi with the YouTube app installed?
by Imperf3kt
Sun Sep 15, 2019 10:40 pm
Forum: General discussion
Topic: can I create my own PI card?
Replies: 8
Views: 273

Re: can I create my own PI card?

If Python is important to your application why not make use of Cython?
by Imperf3kt
Sun Sep 15, 2019 10:24 pm
Forum: General discussion
Topic: Laptop speakers with Raspberry PI
Replies: 25
Views: 551

Re: Laptop speakers with Raspberry PI

I'd recommend the PAM8406 over the PAM8403. I've used both and the 8406 was much better quality for cents more. Depending on your configuration, the 8406 may require a heatsink (any scrap metal should be enough with a 2mm aluminium chunk preferred) You can get them with pre soldered headers if you w...
by Imperf3kt
Sun Sep 15, 2019 10:02 pm
Forum: Beginners
Topic: SDHC? Or just SD?
Replies: 13
Views: 309

Re: SDHC? Or just SD?

mahjongg wrote:
Fri Sep 13, 2019 10:09 pm
... seven year old, must be a record!
Nope, I've seen a necro of a thread at least eight years dead.
https://www.raspberrypi.org/forums/view ... =412#p5525
by Imperf3kt
Thu Sep 12, 2019 1:37 am
Forum: General discussion
Topic: 12v battery + 25 watt Solar = always powered 4B?
Replies: 17
Views: 519

Re: 12v battery + 25 watt Solar = always powered 4B?

Apples and oranges. That should have been 2W. But the point was to demonstrate how long (or how short) a thing will run from one day of charging from such a solar panel. If a 2W solar panel can only give enough energy for a single LED (mW of current) to run for 8 hours, how does OP expect a ~5-15W ...
by Imperf3kt
Thu Sep 12, 2019 1:15 am
Forum: Gaming
Topic: Raspberry Pi as dualshock 3/4
Replies: 4
Views: 340

Re: Raspberry Pi as dualshock 3/4

The ds4 may have a custom chip on board as it uses a touchpad as well as gyroscope input. More than that. The DS4 has a gyroscope, accelerometer, two motors with uneven semicircle weights, touch pad, two analogue joysticks, light bar, speaker, two charging points, aux output, 18 buttons (6 of which...
by Imperf3kt
Thu Sep 12, 2019 12:39 am
Forum: General discussion
Topic: 12v battery + 25 watt Solar = always powered 4B?
Replies: 17
Views: 519

Re: 12v battery + 25 watt Solar = always powered 4B?

Consider those 20W solar garden LEDs you can buy at most hardware shops, garden stores and thrift stores. They power a single LED for about 8 hours (less with age) from a full day of charging in a sunny subtropical climate.

How many LEDs does the Pi have?
by Imperf3kt
Wed Sep 11, 2019 7:06 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 529
Views: 132566

Re: Raspberry Pi 4 temperature

it should be possible (and easy) to change the temperature at which it throttles. It could be default 50C or such in one special image offered to schools,classes This was addressed - its entirely pointless to run it at a cool enough temperature if as a trade off you lose ~75% of the processing powe...
by Imperf3kt
Wed Sep 11, 2019 7:01 am
Forum: General discussion
Topic: Raspberry pi 4 composite out don't working
Replies: 17
Views: 583

Re: Raspberry pi 4 composite out don't working

maybe off topic, but still: it’s strange why the manufacturer produces a raw product without testing the performance of all components? I use raspberry pi exclusively through composite output on crt tv. and it was a surprise to me that the manufacturer disabled this feature by default, believing th...
by Imperf3kt
Tue Sep 10, 2019 10:49 pm
Forum: General discussion
Topic: Power through the POE pins?
Replies: 3
Views: 151

Re: Power through the POE pins?

There are PP pads on the underside of the Pi which can be soldered to (voiding any warranty), but that's about it.
by Imperf3kt
Tue Sep 10, 2019 1:37 pm
Forum: General discussion
Topic: New P4 HDMI sockets
Replies: 25
Views: 728

Re: New P4 HDMI sockets

rpdom, I think the cables should be raspberry coloured That is an excellent idea! Then they would blend in nicely in promo pictures like those here: https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ whilst at the same time distinguishing themselves among the mass of cables that breed beh...

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