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91
Good day to you, whom is reading this!

I've got a slight problem which i'm currently unable to resolve, I'm designing a test-setup as a intern to test I2C PCB's.
Now that i've basicly completed the program, I'm getting a Time-Out at the end of my tests...
Knowing it's a bit hard for you guys to replicate, as you don't have neither the PCB running the software or the PCB's which are to be tested, I somewhat do hope that It's just a typo in my software.

One thing though, the comments in this software are mostly in Dutch... Though if necesarry I'll be able to translate it into English!

Current one I'm testing is the I2C Software, and then the sub catagory of the Interlock PCB.

92
Arduino Yún / Re: Yun No WiFi Connection
Last post by louisbourdon - Today at 09:13 am
I reset everything, and update the image once more.
Now it works again...! Cross my fingers for the future!
93
Sensors / Re: Atmega328 internal compara...
Last post by Peter_n - Today at 09:12 am
Could you make a schematic of your circuit ? You can make a drawing on paper and make a photo of it.
Could you show us your sketch ?

You have a 3.3V reference connected to AREF ? Which voltage reference ?
The analog comparator inside the ATmega328P is pure analog. I think it should detect 1mV difference, so 100mV should not be a problem.

I would use the 1.1V internal voltage reference of the ATmega328P chip. That measures an input with 1mV resolution. At least that is something that works.

94
Generale / Re: Aggiornamenti vicende soci...
Last post by Testato - Today at 09:11 am
Mi hai fatto  :)
95
Programming Questions / Re: Yun vs Arduino board with ...
Last post by PGT - Today at 09:11 am
Answering my own questions, might be handy for others,.

  • yes
  • yes
  • most likely the yun code, its the Yun who has Wifi/Lan access; and there is a bridge library to communicate with the yun.
  • Probaply the Linux variant is OPenWRT, its "open" (but might be a lot of work
  • through serial write and bridge library, it should be possible for the yun as a client to retrieve serial data and then display it on a web page for a client, the bridge library acts as a serial connection much as normal arduino would talk over serial back to a PC, ..in fact a yun can also still do that besides showing its data over web, basicly you can get 2 serial connections from arduino to PC and to yun
96
Deutsch / Re: L298N, Jumper ??
Last post by Muecke - Today at 09:11 am
Ich habe einen Schrittmotor: 17PM-K031-02V
Daten zum Motor: 5V / 0,8A

Diesen Motor möchte ich mit dem Treiber ansprechen.

Daher dachte ich nehme von einem Alten PC Netzteil die 5V und könnte die dann als VCC einspeisen.
Das wären dann die 5V die der Motor benötigt wenn ich das richtig verstanden habe muss ich aber mehr haben
das der Motor 5V bekommt nämlich 7,3V.

ich habe das hier gefunden: http://jankohermann.de/schrittmotor-17pm-k031-und-l298n-modul/

das ist genau der Motor den ich habe, und der Treiber den ich hier bei mir habe.
Auf der Webseite wird der Motor jedoch mit 12V betrieben was Ihn dann irgend wann zu warm werden lässt schreibt er. 

Und das Mit dem Jumper habe ich auch dort nicht verstanden wann muss der weg? und wann muss ich die 5V vom Arduino mit anschließen? oder ist die 5V Klemme eine Ausgangs klemme?

97
Generale / Re: Aggiornamenti vicende soci...
Last post by Etemenanki - Today at 09:10 am
... magari questo ...



:P :D :D :D
98
Generale / Re: Aggiornamenti vicende soci...
Last post by pippo72 - Today at 09:09 am
Intendi questo pesce:D
proprio quello  :smiley-yell:  :smiley-yell:

ciao
pippo72
99
General Electronics / Re: Static Electricity Voltmet...
Last post by Wawa - Today at 09:08 am
So basically, your recommendation is to use 'high impedance' to measure electric potential (open circuit

voltage) of the generator is this correct? I don't exactly understand what the purpose of the capacitor is

here. Using a DMM alone showed unreliable reading (0.34 mV). I will definitely try out using 10 GOhm

soon.
Even that electrostatic voltmeter has some resistance. I can read 10 to the power of 6 Megohms on the scale.

The higher the resistance between object and instrument, the less it will be influenced.
The trade-off is resolution.
We know almost nothing about your project, and how accurate you want to measure that voltage.
Did you use a circuit board. A fingerprint on it might leak more than a 10Gohm resistor.

I mentioned the capacitor in relation to the Arduino, not the DMM.
The capacitor is slowly charged up to the scaled down voltage from the voltage divider.
The A/D of the Arduino periodically takes a sample.
The capacitor holds the voltage steady while the sample is taken.
If your voltage divider was made with 10k resistors, the cap would not be needed.

A DMM alone will load your circuit with 10Megohm, independent of the voltage range you select on the meter.
10Megohm could collapse the voltage of your circuit to almost zero.

Remember that with a 10Gohm resistor in series with the red lead of a DMM, the voltage you measure is 1/1000 of the original. So 200volt measures as 200mV.
Leo..
 

100
Hi All,

By using Interrupts, is there any possibility to solve my problem (Mentioned above) ?
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