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by wayne.dolesman
Thu Mar 30, 2017 8:07 pm
Forum: General discussion
Topic: L293D leakage
Replies: 10
Views: 1115

Re: L293D leakage

If the leakage reaches the GPIO, and drives it over 4 volt, this can potentially damage your PI! But perhaps I'm overreacting. I believe, based on his description, that the leakage is on the pins that drive a motor and should never be hooked up to a Pi. Morecambre: What I do not see most how-to dia...
by wayne.dolesman
Thu Mar 30, 2017 5:25 am
Forum: 日本語
Topic: Radio Law in Japan and USB devices library
Replies: 4
Views: 1610

Re: Radio Law in Japan and USB devices library

I recall from when I worked on telephony stuff, Japan has some strict regulatory issues. With that in mind I decided to google a bit. http://www.japantimes.co.jp/life/2015/03/07/digital/using-imported-mobile-devices-may-illegal/ "All wireless devices sold in Japan must have a technical conformity ce...
by wayne.dolesman
Tue Mar 28, 2017 6:26 pm
Forum: Advanced users
Topic: HDMI-less display using USB
Replies: 1
Views: 520

Re: HDMI-less display using USB

I suspect that the USB is tied to USB processing hardware. USB has some timing constraints which is why you dont see GPIO usb adapters. DisplayLink is a way of adding a monitor over USB. You may want to look at that instead. http://www.displaylink.com/products/usb-monitors There are many monitors wi...
by wayne.dolesman
Mon Mar 27, 2017 1:24 am
Forum: General discussion
Topic: apt-get upgrade error [solved]
Replies: 12
Views: 2742

Re: apt-get upgrade error

The package should still be updated to prevent others from having the same issue. Not sure who the package maintainers are.
by wayne.dolesman
Sun Mar 26, 2017 1:46 pm
Forum: Troubleshooting
Topic: Pi Zero not booting, possibly defective
Replies: 12
Views: 1568

Re: Pi Zero not booting, possibly defective

I have tried connecting the USB on the Pi Zero to my MacBook but nothing appeared in MacOS in either DMESG or System Profiler. I will try it again with Linux as soon as I get my hands on a spare USB to boot a live distro on. Did you try without an SD card at all and USB in the USB not power jack? Y...
by wayne.dolesman
Sat Mar 25, 2017 11:39 pm
Forum: Automation, sensing and robotics
Topic: Small Pan/Tilt Servo?
Replies: 3
Views: 753

Re: Small Pan/Tilt Servo?

These guys used 2 steppers and can be adapted using smaller DC or stepper motors as long as there is sufficient torque.
https://www.youtube.com/watch?v=HoRPWUl ... =WL&t=274s

A proper thrust bearing might also help.
by wayne.dolesman
Sat Mar 25, 2017 11:02 am
Forum: Advanced users
Topic: Let's talk about anti virus and anti malware
Replies: 21
Views: 6271

Re: Let's talk about anti virus and anti malware

1. How to remove the pi user two options, replace "pi" in /etc/passwd and /etc/group and /etc/sudoers (if its there and not group based) to something else (they have to know both the username and password to log in, having a stock username gives them part of the info needed). You may also sudo addu...
by wayne.dolesman
Sat Mar 25, 2017 10:49 am
Forum: Advanced users
Topic: Let's talk about anti virus and anti malware
Replies: 21
Views: 6271

Re: Let's talk about anti virus and anti malware

There will never be a turnkey system for real security, there will just be a "club" like device. The automotive anti-theft device "the club" works on the premise that its easier to steal someone elses car than yours. It is not hard to remove (most steering wheels are plastic and easily cut) but it t...
by wayne.dolesman
Fri Mar 24, 2017 12:35 am
Forum: Wolfram Language
Topic: i dont see any point
Replies: 18
Views: 14066

Re: i dont see any point

I think you've missed his point Wayne, He's asking whether you can produce stand alone executable binaries with wolfram (is it a compiled language?) or whether wolfram is in fact a scripting language that needs a specific application to be useful (wolfram-engine runs the script?). I thought I cover...
by wayne.dolesman
Fri Mar 24, 2017 12:27 am
Forum: General discussion
Topic: Pi Zero test points
Replies: 7
Views: 3295

Re: Pi Zero test points

If that is the only error I made in that list then I am not doing too bad :)

Thanks
by wayne.dolesman
Tue Mar 21, 2017 1:25 pm
Forum: Beginners
Topic: Terminal for SPI communication
Replies: 13
Views: 2735

Re: Terminal for SPI communication

Added more code. It is still not fully functional, but its getting there. I am just going page by page in the data sheet adding functionality. The test.py program is similarly being updated to show how to use the new features.

https://github.com/Nom-DePlume/libCC1101

Pull requests welcome.
by wayne.dolesman
Mon Mar 13, 2017 7:21 pm
Forum: Beginners
Topic: Terminal for SPI communication
Replies: 13
Views: 2735

Re: Terminal for SPI communication

Unfortunately I don't have much programming experience. Maybe some C while programning PIC microcontrollers, but at a very basic level. I was hoping that by doing the communication manually, at a start, it would make life easier when moving over and make it with code instead. But I'm probably wrong...
by wayne.dolesman
Mon Mar 13, 2017 2:03 pm
Forum: General discussion
Topic: Commercial Use of the Pi
Replies: 203
Views: 22496

Re: Commercial Use of the Pi

mikerr wrote: Do you find a tin foil hat helps ? :)
But those just amplify government frequencies. They want you to wear one. :P

http://web.archive.org/web/201007082302 ... mi/helmet/
by wayne.dolesman
Mon Mar 13, 2017 2:01 pm
Forum: General discussion
Topic: Commercial Use of the Pi
Replies: 203
Views: 22496

Re: Commercial Use of the Pi

I both agree and disagree. For products that need the additional I/O, and don't need the connectors, and have sufficient margins to absorb the CM's significantly higher cost, yes, the CM's are perfect. There is also the form factor. I am working with the local e-nable chapter to do an electronic pr...
by wayne.dolesman
Mon Mar 13, 2017 1:39 pm
Forum: General discussion
Topic: Quick bash Question
Replies: 9
Views: 4109

Re: Quick bash Question

Martin Frezman wrote:But actually, most of bash is inherited from the general class of "Bourne-ish shells"
The newest in the saga, The Bourne Shell starring Matt Daemon (cause he runs in the background) :)
by wayne.dolesman
Mon Mar 13, 2017 1:34 pm
Forum: General discussion
Topic: Quick bash Question
Replies: 9
Views: 4109

Re: Quick bash Question

One way to look at it is that variables have two properties. Their name and their contents. Is the '$' symbol only used in comparison? Cant seem to find the answer i need in google :P $ is a way to reference the contents. Without it you are referencing the variable. basket = apples; aka The basket c...
by wayne.dolesman
Mon Mar 13, 2017 1:01 pm
Forum: General discussion
Topic: Pi Zero, all I see is an unknown device called BCM2708 Boot
Replies: 27
Views: 5684

Re: Pi Zero, all I see is an unknown device called BCM2708

gregric thanks for the forum post that talks about this and gives the same instructions the github repo contains. No worries wayne. It's been a day or so, and none of the mob that defamed you have been back here to apologise - sad. I didnt think they would. A block worked anyway, it was not just th...
by wayne.dolesman
Mon Mar 13, 2017 12:18 pm
Forum: Beginners
Topic: Terminal for SPI communication
Replies: 13
Views: 2735

Re: Terminal for SPI communication

This radio is a bit more complex and a simple terminal probably wont work the way you want it to. Just initializing the radio to get it to go into Tx or Rx mode requires quite a few steps. Setting the frequency requires 3 writes after doing some math. An interface library is the way to go for this b...
by wayne.dolesman
Mon Mar 13, 2017 4:46 am
Forum: Beginners
Topic: Terminal for SPI communication
Replies: 13
Views: 2735

Re: Terminal for SPI communication

@wayne.dolesman: Sorry for being unclear. I want to send a series of bits, 8-512. Ok, well the console terminal app is actually fairly easy and generic. That I have below. The spi specifics I didnt do yet because I wasnt sure how it was going to be done. I have attached the app - although for sendi...
by wayne.dolesman
Mon Mar 13, 2017 4:38 am
Forum: Beginners
Topic: is there anyway to use my offline Android phone as a time se
Replies: 1
Views: 493

Re: is there anyway to use my offline Android phone as a tim

There are probably a couple ways. The least accurate is to find an NTP server for android. This should not be terribly difficult. The phones clock drift would potentially cause issues if accuracy is your desire. The more accurate way would be to use the phones GPS if it has one as a clock source. Th...
by wayne.dolesman
Sun Mar 12, 2017 9:34 am
Forum: Beginners
Topic: Terminal for SPI communication
Replies: 13
Views: 2735

Re: Terminal for SPI communication

When you say you want to send 1-64 byte what exactly do you mean?

A series of bits 1-64 bytes long? (eg 8-512 bits)
The byte value 1-64? (eg 0x01 - 0x40)
Something else?

I could do a simple SPI console app in python but I would need to know exactly what is being sent.
by wayne.dolesman
Sat Mar 11, 2017 10:46 pm
Forum: General discussion
Topic: Pi Zero, all I see is an unknown device called BCM2708 Boot
Replies: 27
Views: 5684

Re: Pi Zero, all I see is an unknown device called BCM2708

The Device Boot section on that first link is an empty holding page, but there's more info on device/slave boot at the end of https://github.com/raspberrypi/usbboot and gsh mentions it here too: https://www.raspberrypi.org/forums/viewtopic.php?f=98&t=171975&p=1101183&hilit=rpiboot#p1101595 Not for ...
by wayne.dolesman
Sat Mar 11, 2017 10:14 pm
Forum: General discussion
Topic: Pi Zero, all I see is an unknown device called BCM2708 Boot
Replies: 27
Views: 5684

Re: Pi Zero, all I see is an unknown device called BCM2708

OK, for the benefit of the community, please give step by step instructions how to boot a Zero (or any Pi (except the 3b) for that matter) without a SD Card? Don't hold your breath waiting. Wayne, the deployer of mis-information, doesn't have a good record of posting anything that might actually wo...
by wayne.dolesman
Sat Mar 11, 2017 9:51 pm
Forum: General discussion
Topic: Pi Zero, all I see is an unknown device called BCM2708 Boot
Replies: 27
Views: 5684

Re: Pi Zero, all I see is an unknown device called BCM2708

Wayne is correct, it wasn't inaccurate: that's the message the bcm2835 gives during the first stage of its USB slave boot. Indeed it can boot linux that way, no SD card at all, but requiring a computer on the other end of the cable, not mass storage. But that's not what the OP is after here I suspe...
by wayne.dolesman
Sat Mar 11, 2017 5:05 am
Forum: Wolfram Language
Topic: i dont see any point
Replies: 18
Views: 14066

Re: i dont see any point

I understand your comment. As a scientific calculator, this is awesome. So I am having trouble finding out how to make a stand alone application, that I can distribute to people who do not have Wolfram installed on their computer. Where can I find information to make an .exe application? This seems...

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