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by BMS Doug
Wed Sep 27, 2017 9:48 am
Forum: Off topic discussion
Topic: Raspberry Pi Amazon Proces
Replies: 3
Views: 887

Re: Raspberry Pi Amazon Proces

Always worth checking who the seller actually is rather than believing the "by" name.

If you want to buy multiple I would recommend checking the official re-sellers, some of them have a pre-soldered header version which can be sold to you in a higher multiple (I've seen 20)
by BMS Doug
Fri Sep 22, 2017 7:31 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

Yay, destruction time! :D Have you any tip about how to disconnect only those pins on this tiny component (other than probably phisically remove them forever with a cutter)? Searching on another forums I also found this thread where a user suggested to completely remove the chip and connect 5V dire...
by BMS Doug
Thu Sep 21, 2017 8:33 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

If Vout is 6.2 - 7V then there is no guarantee that a 5V supply will be enough to drive it.
by BMS Doug
Thu Sep 21, 2017 7:41 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

I would suggest feeding the board with a reduced voltage and seeing how the voltages change, try 9V if you can. Hi BMS Doug, at the moment I don't have a 9V DC supply reliable at home so I tried with an higher voltage, 24.4V. I hope this will help anyway! These are my measurements: Pin1: 7.18V Pin2...
by BMS Doug
Mon Sep 18, 2017 8:29 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

I would suggest feeding the board with a reduced voltage and seeing how the voltages change, try 9V if you can.
by BMS Doug
Mon Sep 18, 2017 8:27 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

I Agree that the JWBV 795D is the voltage regulator, I was also unable to locate a datasheet. The voltage regulator will have a recognisable set of inputs and outputs, the first 4 are likely to be present on most voltage regulators: Vin (Input Voltage) Vout (Output Voltage) En (Enable) Gnd (Ground) ...
by BMS Doug
Mon Sep 04, 2017 1:34 pm
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

Thank you for the reply BMS Doug! I'm not sure if i'm in need of a new(decent) multimeter. I wasn't getting any reading from 1,3,4,5,6, or 8. I was getting in between 3.7 and 4.8 on 2 and 7. This was when you were feeding it from a 5V supply? Please connect a 12V supply to the board for testing pur...
by BMS Doug
Fri Sep 01, 2017 2:22 pm
Forum: Beginners
Topic: How to complete power of raspberry pi 3 board using commands
Replies: 7
Views: 475

Re: How to complete power of raspberry pi 3 board using commands

Pi supply power switch How does it work? Once you have finished using your Raspberry Pi, you just shutdown using the sudo halt command, and then a couple of minutes after the full and safe shutdown the Pi Supply Switch cuts the power to the computer. From this point, once again, all you would need ...
by BMS Doug
Fri Sep 01, 2017 11:51 am
Forum: Beginners
Topic: How to complete power of raspberry pi 3 board using commands
Replies: 7
Views: 475

Re: How to complete power of raspberry pi 3 board using commands

pnaven03 wrote:
Fri Sep 01, 2017 11:46 am
Thanks for the reply,

No we are not using usb power for LCD.

Any methods to complete turn off raspberry pi 3 using commands.
please any one help me on this.
You will need additional external hardware to achieve this.
by BMS Doug
Fri Sep 01, 2017 9:18 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

Hiroc80 wrote:
Thu Aug 24, 2017 9:31 am
Hello guys. I bought the BW auto monitor from Amazon. I connected the monitor to my Rasberry Zero but it does not work. Does anyone know how I can modify it to 5V? Attach the monitor photo. Thank you :)
We'd need to know about the voltage regulator chip to help.
by BMS Doug
Fri Sep 01, 2017 9:16 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 450
Views: 171684

Re: Modifying a 3.5" car display for USB power.

Hello all, I have this board. 5" reverse monitor pcb https://imgur.com/gallery/4K83d I'm having trouble getting it to run off of 5v. It's a 5" reverse monitor. The 8 leg(pin?) Chips are labeled "MK 25D40BTIG 1717" (located in the middle of the board) and "Toehcode TD1519A FB516462" (side of pcb: th...
by BMS Doug
Sat Aug 12, 2017 11:47 pm
Forum: General discussion
Topic: RPI 0 W gadget mode?
Replies: 4
Views: 357

Re: RPI 0 W gadget mode?

No, the wifi and bluetooth aren't connected by USB, gadget mode is still available.
by BMS Doug
Thu Aug 10, 2017 7:09 am
Forum: General discussion
Topic: UL (for usa market) certification and raspberry pi
Replies: 1
Views: 219

Re: UL (for usa market) certification and raspberry pi

Worth contacting the dedicated team of Raspberry pi related testers at UL?

Read more in Raspberry Pi's blog article.
by BMS Doug
Fri Jul 28, 2017 7:27 am
Forum: Beginners
Topic: Raspberry Pi as a "telephone" for elder people
Replies: 4
Views: 565

Re: Raspberry Pi as a "telephone" for elder people

I doubt there is any offline Polish voice recognition for the Pi. The Google AIY kit might be interesting for you. Note that the "intelligence" and featureset of such systems will heavily depend on your own programming skills , the voice recognition aspect is only a small part of the puzzle (albeit...
by BMS Doug
Thu Jul 27, 2017 3:21 pm
Forum: General discussion
Topic: Pi2 SD image (old Pi2): will it p'n'p work for a new Pi 3 too?
Replies: 10
Views: 594

Re: Pi2 SD image (old Pi2): will it p'n'p work for a new Pi 3 too?

1dot0 wrote:
Thu Jul 27, 2017 3:00 pm
I have installed Raspian Jessie via NOOBS, but then updated vos update/upgrade -
so what does this mean for my problem eventually? Better buy an old Pi2 again?
You can't buy an old Pi2 (except maybe 2nd hand), the Pi2's that you can buy now have the same processor as the Pi3.
by BMS Doug
Thu Jul 27, 2017 3:18 pm
Forum: General discussion
Topic: Damage the Pi Zero, having a usb pad soldered and connect computer?
Replies: 5
Views: 475

Re: Damage the Pi Zero, having a usb pad soldered and connect computer?

The PC will output 5V to the Pi's USB circuitry. As the Pi0 doesn't have a complicated power circuit this will power up the pi, with the potential problems listed previously.
by BMS Doug
Thu Jul 27, 2017 2:11 pm
Forum: Beginners
Topic: I2C
Replies: 7
Views: 543

Re: I2C

You may find that running more than one of those sensors on a single I²C bus isn't possible. The MCP23017 has three address pins that allow you to change it from 0x20 to 0x27 inclusive on the I²C bus. According to the technical data it is possible to write a new address to each sensor, they all com...
by BMS Doug
Thu Jul 27, 2017 1:08 pm
Forum: General discussion
Topic: Damage the Pi Zero, having a usb pad soldered and connect computer?
Replies: 5
Views: 475

Re: Damage the Pi Zero, having a usb pad soldered and connect computer?

I'm speculating: Pi will not work correctly while connected to both USB controller and computer, The USB can only communicate with one device (such as the USB controller, which is then capable of communicating with more devices) and connecting two at once will mean that neither will work. adding a s...
by BMS Doug
Thu Jul 27, 2017 7:36 am
Forum: Off topic discussion
Topic: Programming Question
Replies: 24
Views: 2896

Re: Programming Question

Why would one agree with a statement that is demonstrably incorrect? To be contrary for the sake of exaggeration? I'd been tempted to add that n-dimensional geometry was essential, but thought that would be a step to far. 95% certain it's a spambot, given the profile link is to a 'marketing agency'...
by BMS Doug
Tue Jul 25, 2017 2:03 pm
Forum: General discussion
Topic: STICKY: NEW FORUM SKIN - Comments here please.
Replies: 283
Views: 24002

Re: NEW FORUM SKIN - Comments here please.

I Like it so far, but this is only the 2nd topic that I have looked at.
by BMS Doug
Mon Jul 24, 2017 10:12 am
Forum: AIY Projects
Topic: General question about the AIY kit
Replies: 8
Views: 1068

Re: General question about the AIY kit

I've found a few scattered references to using AIY offline (mostly articles published when AIY was released) but no concrete confirmation that its possible or instructions on how to implement it.
by BMS Doug
Mon Jul 24, 2017 9:30 am
Forum: AIY Projects
Topic: General question about the AIY kit
Replies: 8
Views: 1068

Re: General question about the AIY kit

Okay I do not understand where Google fits in with the voice hat Once you have set up your google account and set the verification keys into the voice HAT it will automatically connect to google to process the voice recognition. I don't think that it holds sufficient voice recognition processing on...
by BMS Doug
Fri Jul 21, 2017 7:19 am
Forum: Astro Pi
Topic: Sourcing Astro Pi parts from USA-based websites/stores
Replies: 15
Views: 2492

Re: Sourcing Astro Pi parts from USA-based websites/stores

Now that we have (finally!) got the http://www.astropicase.com website online and live, Chris has been able to announce that rather nice Switchboard. Even though my contribution was no more than sketching out an idea and saying "make so, number one!", I'm still quite proud of how nice it turned out...
by BMS Doug
Thu Jul 20, 2017 9:58 am
Forum: General discussion
Topic: Bricked my Pi. don't know why
Replies: 121
Views: 5645

Re: Bricked my Pi. don't know why

So, two possibilities: Your power supply was inverted and you put 5V onto Gnd and Gnd to 5V (Fairly unlikely as they are pretty well marked on your kit and you had tested it. (Speculation): Your 12V 0.3A (3.6W) supply couldn't cope with the load of the pi and its power became unstable, dipping and r...
by BMS Doug
Thu Jul 20, 2017 8:42 am
Forum: General discussion
Topic: Graph & timeline of Pi Sales
Replies: 66
Views: 13421

Re: Graph & timeline of Pi Sales

Model breakdown: Model B: 3 million units. Model B+: 2 million units. Model 2B: 3 million units. Model 3B: 5 million units. Others: 1-2 million units. Now nearly 15 million total, with 10 million Raspberry Pi produced in the UK factory. Other includes the A, A+, zero and zero W, Am I right in think...

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