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21
Yep, they're the same.
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General Electronics / Re: Lipo battery monitor with ...
Last post by 000 - Today at 10:07 pm
@Peter_n

I am planning to use Arduino IDE for coding.

Hmmm. Do you know of anyway we can test the theory out? (I want to iron it out once and for all ) Has there been any testing of its performance ever documented? (Can any of the senior members remember something similar happening out here in the forums.)

Here is a link which I found interesting on the topic.
http://electronics.stackexchange.com/questions/107741/required-output-impedance-for-adc-input
23
Project Guidance / Re: Rocket gyro or accel
Last post by DrAzzy - Today at 10:05 pm
I think it's gotta be a gyro... since if the rocket turns, the accelerometer will turn with it, and continue to report it rapidly accelerating straight forward (unless the rocket is firing sideways...), whereas the gyro will report that it's turning....

This is a very demanding application - you have very little time to react to a small problem with the direction before it slams into the ground or a bystander. It's a lot easier to build the rocket so it goes straight in the first place, without any guidance.
24
Deutsch / Re: RTC DS1307 --- Wir leben i...
Last post by michael_x - Today at 10:05 pm
Hast du überhaupt einen Akku (LIR 2032) oder eher eine CR2032 Batterie ?

Ich tippe mal: wenn die Spannung der Batterie unter 3.8V ist, läuft die Uhr.
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Hardware / Re: Togliere la corrente a 60 ...
Last post by pablos - Today at 10:05 pm
Non vedo l'argomento attinente con arduino e la descrizione è poco chiara.

Quote
Lo stacco del circuito avviene fisicamente, facendo staccare ad un macchinario apposito due connettori
Secondo la normativa di sicurezza al caso in Italia nessun carico al di sopra di 1.999Kw può essere interrotta con l'estrazione di una spina manualmente, oltre questo limite l'utenza deve essere provvista di spina con interblocco, da come descrivi sembra che ci sia un tipo che corre in emergenza e strappa 2 cavi al volo :)
Se intendi invece quale dispositivo automatico è più adatto .. allora devi cercare un contattore che sia il più veloce possibile e che abbia le superfici dei contatti composti da apposito materiale che supporti il breve arco senza danneggiare l'apparato, potere di interruzione, ecc ecc .....
Ti suggerisco come fanno tutti i progettisti di contattare l'ufficio tecnico delle diverse case che producono interruttori, contattori industriali specificando che tipo di carico si vuole comandare (induttivo/resistivo) per ottenere il componente più adatto al tuo caso.

Se ho capito male la domanda, ritieni nulla la risposta  :D

ciao
26
Quote
Can you provide me further information on this?
As a zener approaches its knee ( cut off voltage ) it starts to conduct. This is way before it clamps. This distorts the signal that you are trying to measure.

That is what I said before, what do you not understand about this statement?
27
If Vin is less than 7 volts, you have a power problem.
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Programming Questions / Re: Visual Studio
Last post by Hackscribble - Today at 09:57 pm
Hi matt

Code: [Select]
char myChar;
myChar = Serial.read();


You should use Serial.available() to check if a character has been received before you call Serial.read().  Have a look at the first example on this page: http://www.gammon.com.au/forum/?id=11425

Code: [Select]
if(myChar = 'r')

There is a difference in C between = and ==.  Check out this: http://arduino.cc/en/Reference/If

Regards

Ray


29
General Electronics / Re: voltage boost
Last post by jremington - Today at 09:57 pm
Pololu offers a nice selection of boost regulators at http://www.pololu.com/category/132/step-up-voltage-regulators
30
This is the breadboard layout:
I see a problem immediately!

You have indicated that your stepper and ULN2003 are taking power from the 5V terminal on the Arduino.  You will be in for a world of pain!

You need a separate power supply for the stepper, one capable of providing the necessary current.
I do? I thought of that too, but from this website, which uses about the same type of stepper and driver, doesn't use an additional power source, so that's why I didn't too.

I already ran code to try out the stepper, and that worked fine.

Googling from your post I get to the arduino website where they indeed recommend a power supply for the stepper.

So, can I just pull the current from the wall and wire it like in the example? I'm now trying to find proper wiring here...


PS Vaclav, if you don't take the time to read where this topic is about, you are not going to be able to help me much.
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