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by masa-aud
Wed May 04, 2016 10:55 am
Forum: Advanced users
Topic: Error in Measuring RPM using raspberrypi 2
Replies: 3
Views: 693

Re: Error in Measuring RPM using raspberrypi 2

reply to dhruvkpatel11 on RPM measuring
Please list up same conditions you think of the attached hardware and software for both Pis in more specific, then you will find the reason for this.
by masa-aud
Wed May 04, 2016 10:21 am
Forum: General discussion
Topic: Temperature Sensor Accuracy
Replies: 7
Views: 1774

Re: Temperature Sensor Accuracy

reply to Greg Tom on sensor accuracy It seems that such rough accuracy comes from restricted number of bits of ADC and rather small input voltage in contrast to that full scale voltage range. Checking the voltage step relating to each one bit increment as xxx1 mV, next then xxx2 mV, e.g. and also pl...
by masa-aud
Wed May 04, 2016 8:19 am
Forum: General discussion
Topic: Assistance choosing the proper MOSFET
Replies: 14
Views: 2994

Re: Assistance choosing the proper MOSFET

reply to undermutt on using MOSFET I think that in case of 3v3 environment I prefer Transistor rather than MOSFET because of it's higher on-point around 4V e.g. of the gate input voltage that means Pi can not output such. But being careful the Tr just at it's saturated on-condition for full driving ...
by masa-aud
Tue May 03, 2016 11:45 pm
Forum: General discussion
Topic: Biometric voice authentication
Replies: 7
Views: 1887

Re: Biometric voice authentication

For your reference,
http://www.nist.gov/itl/
by masa-aud
Tue May 03, 2016 11:36 pm
Forum: General discussion
Topic: Biometric voice authentication
Replies: 7
Views: 1887

Re: Biometric voice authentication

reply to Ahmedhanie on voice metric and authentication I guess that the technology is still under study phase although several toy-like kinds are being used. You might think about "voice print" that word comes from finger print. The metric will be as loci of frequency of each person's pitch and form...
by masa-aud
Mon May 02, 2016 10:04 pm
Forum: Beginners
Topic: Help with hardware connection
Replies: 3
Views: 531

Re: Help with hardware connection

reply toEljoodo on hardware connection I think that as far as your hardwares are with standard interfaces such as USB, HDMI, EtherNet or RCA composite, then you will succeed to connect these in ease at least physically and electrically. After that you will go through logical connection to work them ...
by masa-aud
Mon May 02, 2016 9:36 pm
Forum: Beginners
Topic: power manegement switch circuit help
Replies: 30
Views: 2741

Re: power manegement switch circuit help

reply to darkbibble on power switch
I think you have found a good solution that shows power sources automatically valved and the power safely applied to your Pi without discontinuity with a diode and no need of alarming time to plug in or off to switch power sources as you firstly thought.
by masa-aud
Sat Apr 30, 2016 5:31 am
Forum: Advanced users
Topic: Tutor/Collaborator required
Replies: 6
Views: 1031

Re: Tutor/Collaborator required

reply to herewego on Tutor/collaborator required
I think this forum works well also for you as Raspberry Pi's are well activated together with microprocessors and mechanisms although they are healthy themselves working under the operating system such as Raspbian.
by masa-aud
Sat Apr 30, 2016 5:13 am
Forum: Beginners
Topic: Hello! Analog fax and rasberri pi
Replies: 3
Views: 2453

Re: Hello! Analog fax and rasberri pi

reply to chmod on fax by Pi FAX was the worldwide standard important communication system so that the manufacturers are strongly asked each other to be responsible for the behaviour of their products. Then today I think that it will not be easy to get reliable information in specific. But anyone can...
by masa-aud
Sat Apr 30, 2016 4:42 am
Forum: General discussion
Topic: Home automation
Replies: 4
Views: 833

Re: Home automation

reply to AHacker on HA
I guess that you will find many app's for your need to detect open-sesami like simple voice rather than recognition of normal speech to control home appliances with ease although I don't know such programs in specific.
by masa-aud
Sat Apr 30, 2016 4:11 am
Forum: General discussion
Topic: speaker-test issue
Replies: 1
Views: 1180

Re: speaker-test issue

reply to ShunJianLee on speaker test I think you need to know several settings to get sound rather than audio devices normally output sounds simply by plug-in and power-on. You will find what you need at a glance of the forum -> Using the Raspberry Pi -> Troubleshooting -> Analog audio problems? pos...
by masa-aud
Wed Apr 27, 2016 2:14 am
Forum: Troubleshooting
Topic: Connect an 5V 4 Channel Relay Board Module with pi 3
Replies: 6
Views: 1201

Re: Connect an 5V 4 Channel Relay Board Module with pi 3

reply to janroc on 5V relay board It depends on pull-up condition of the input for controlling relay. You will find it on the diagram or by directly viewing the circuit pattern or check the voltage on the input pins with a multi-meter. BTW, as far as my optimistic guessing, these modules mostly desi...
by masa-aud
Wed Apr 27, 2016 1:49 am
Forum: Advanced users
Topic: How is 3V GPIO usable?
Replies: 13
Views: 2958

Re: How is 3V GPIO usable?

reply to Eliter on GPIO and relay I think firstly that relay often seems to be used easily but practically needs much knowledges and experiences as this members also refer. The second is shortcomings as size, weigh, energy consuming, noise and chattering etc.. I recommend to use FET arrays e.g. for ...
by masa-aud
Mon Apr 25, 2016 12:54 pm
Forum: General discussion
Topic: Trying to create a car pi with my son
Replies: 12
Views: 1970

Re: Trying to create a car pi with my son

reply to PureKrome on RCA cable
What somewhat confusing is there are several different standards of RCA cable but this seems useful for your car Pi that I was informed aslo.
http://www.raspberrypi-spy.co.uk/2014/0 ... ideo-jack/
by masa-aud
Sat Apr 23, 2016 10:34 pm
Forum: Advanced users
Topic: Solar power, when available..
Replies: 2
Views: 620

Re: Solar power, when available..

reply to Massi on Solar It will be simple as the solar output to join to your power line relying mostly on the regional grid power. Your solar can output simply according to the sun shine to your line reducing the bill for the power. In case you think a standalone power mechanism by solar for your s...
by masa-aud
Sat Apr 23, 2016 9:38 pm
Forum: Beginners
Topic: Fixed But How ?????
Replies: 4
Views: 787

Re: Fixed But How ?????

reply to hitsware on ??? Please retry whole your work then you will find the reason why. I think that is the shortcut to reach the origin of such ???. Helpful is that you have another SD for Raspbian instead of rewriting. And be careful for the contact condition of SD slot when inserting your SD and...
by masa-aud
Sat Apr 23, 2016 9:16 am
Forum: General discussion
Topic: Choosing the correct DIGI+ Board. HifiBerry interrupting.
Replies: 22
Views: 3315

Re: diy powersupply interrupting

reply to djevlen on psu About the cap 2200uF, it seems the output voltage of the transformer such 6Vx2 not enough for the regulator to output firmly 5V at (2A), because the rectifier can show but only around 7.4V even at peak that will cause frequent 0V at the regulator output as 100Hz or 120Hz. If ...
by masa-aud
Fri Apr 22, 2016 2:17 pm
Forum: Advanced users
Topic: Servo vs DC motor vs stepper motor
Replies: 3
Views: 1318

Re: Servo vs DC motor vs stepper motor

reply to tampe125 on motor selection My images are like those, If several critical points between the start position A and the end position B are assumed then stepper. If both positioning of A and B are to be defined by motor then servo. If both A and B are sure to be fixed with the frame mechanism ...
by masa-aud
Fri Apr 22, 2016 8:34 am
Forum: General discussion
Topic: BBC radio player via inernet
Replies: 6
Views: 2024

Re: BBC radio player via inernet

reply to feverish on BBC via internet
My experieces are often such that broadcasters' pages require flashplayer for most of the live videos and audios as they show on screen as BBC, DWTV, France24 and NHK etc... But some programs on demand fit to current Pi as a good receiver.
by masa-aud
Fri Apr 22, 2016 7:16 am
Forum: General discussion
Topic: Connecting a 24v appliance to Raspberry Pi.
Replies: 8
Views: 1272

Re: Connecting a 24v appliance to Raspberry Pi.

reply to atomicpaper on gpio to solenoid
The driving power of the transistor can be checked as, firstly the output voltage of the pin, then estimating the base current, and collector voltage and current through the solenoid enough to move or not, and so on only with a multimeter. Please try.
by masa-aud
Fri Apr 22, 2016 6:37 am
Forum: General discussion
Topic: Choosing the correct DIGI+ Board. HifiBerry interrupting.
Replies: 22
Views: 3315

Re: diy powersupply interrupting

reply to djevlen on diy psu I think that the 2200uF is too small to supply enough energy for the step down circuit to output constant 5V (2A) to your Pi from the rectifier (even a bridge type), apart from the cap at the output is restricted to less than 820uF e.g.. BTW I wonder why your psu is sensi...
by masa-aud
Wed Apr 20, 2016 9:48 am
Forum: 日本語
Topic: 教えてください。Raspberry Pi2 デスクトップ日本語表示について
Replies: 4
Views: 1562

Re: 教えてください。Raspberry Pi2 デスクトップ日本語表示について

reply to masanori_ichinobe on 日本語表示 私も戸惑った一人ですが、インストールに始まる手順の辿りが大事のようです。ベースは英語ですから、インストール後の初期設定は英文字で進み、ただキーボードは英国式はかなり違うので、日本語用を早期に選択するようにしました。のち、言語は日本語を選択、その後日本語の機能とフォントをインストールして、リブートすると、ごみ箱と日本語が出ました。なお、日本語と英語の切り替えは、半角全角漢字のキーで出来るプログラムと、画面右上のアイコンクリックでするプログラムとがありました。どなたか詳しい方にこの日本語フォーラムの頭に日本語機能搭載の確実な手...
by masa-aud
Wed Apr 20, 2016 12:09 am
Forum: Advanced users
Topic: Analogue audio testing
Replies: 265
Views: 134003

Re: Analogue audio testing

Is it sure for signed binary to zero audio level not for unsigned binary in order to avoid zero shift ?
by masa-aud
Tue Apr 19, 2016 11:42 pm
Forum: General discussion
Topic: no sound hdmi or analog
Replies: 3
Views: 1017

Re: no sound hdmi or analog

reply to no sound issue
You will be sure to succeed soon trying shown instructions.
And yet I think that as far as people always rely on the sound and video output form the target when to setup, the system also Pi's are recommended to output audio and video without any particular process.
by masa-aud
Tue Apr 19, 2016 11:17 pm
Forum: General discussion
Topic: Getting Rid of Loud Pop During Turnon and Turnoff
Replies: 4
Views: 762

Re: Getting Rid of Loud Pop During Turnon and Turnoff

reply to Pop Noise Issue I think that the origin of the pop noise comes from the built-in DA converter that is rather not for normal audio signal as its output vibrates plus and minus from zero. Where the zero level is welcome as the ground of Pi to normal audio equipments. If Pi's zero of audio out...

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