Show Posts
Pages: [1] 2 3 ... 945
1  Topics / Science and Measurement / Re: Problem while connecting the Arduino to external power supply AND USB for interf on: Today at 04:15:56 am
does the computer and the Arduino share the power supply?

Can you make a drawing and post that please?
2  Topics / Home Automation and Networked Objects / Re: Relay and Determining the State of the Relay on: Today at 04:14:26 am
Still a (mechanical) relay draws quite some current, and an Arduino can only deliver 20mA per pin - for short time!!

So do you have a link to the datasheet of the Relays - to check they draw much less. - please post
3  Using Arduino / Interfacing w/ Software on the Computer / MOVED: biblioteca en ensamblador on: Today at 03:56:13 am
This topic has been moved to EspaƱol.

http://forum.arduino.cc/index.php?topic=267644.0
4  Using Arduino / Sensors / Re: Ktype thermocouple UNO/LilyPad difference on: Today at 02:50:16 am
Assuming the code is the same?

Can you send a link to the MAX7765 Thermocouple Library used? (or post it)

First though that comes up is that there is a (small) difference in power supply.
You might check that with a DMM. 
5  Using Arduino / Sensors / Re: Real Time Clock Testing Results DS3231/PCF8563/MCP79400 on: Today at 02:45:05 am
Thanks, ~40 days test

Do the numbers agree with the datasheets?

// would be nice to have an e.g. 300000 seconds test with an Arduino and millis() to show the added value of an RTC
6  Topics / Device Hacking / Re: do you recognize this asynch serial protocol? Saleae capture on: Today at 12:56:35 am
for me it seems to be 16 bits + start bit
0 0001 0011 1100 1100  ==  0x13CC

agree it looks like 3000 bps , but salae can measure this exactly

7  Topics / Home Automation and Networked Objects / Re: Relay and Determining the State of the Relay on: Today at 12:45:08 am

Relay's need a separate power supply.
google (images)  "arduino connect relay" and you will get nice schema.

eg - http://www.electroschematics.com/8975/arduino-control-relay/ -
8  Using Arduino / Storage / Re: HOW DO I STORE IN EEPROM longer BYTES on: Today at 12:40:40 am
The compiler will optimize powers of 2 in divide / modulo operators.
This has been discussed && analyzed more often on this forum.
The AVR tool-chain includes objdump.exe which can produce assembly listings to check.
9  Using Arduino / Sensors / Re: Detect 0.1mm object on: September 17, 2014, 01:42:36 pm

if the thing on top is from metal and the rest not a metal detector could do the job.
10  Development / Suggestions for the Arduino Project / Re: Auto Format challenged by long macro with "\" line continuation characters on: September 17, 2014, 01:24:15 pm

the auto formatter is not that robust if you have (  between "  "  or  {  the indentation fails too

It is a nice graduation project to write a really robust formatter
11  Using Arduino / Microcontrollers / Re: Cheap Chinese clone: Programmer not responding on: September 16, 2014, 01:49:35 pm

Analyse the output of the boot loader burning process?
compare it to avrdude output? (use commandline verbose flag?

disclaimer - Never did it myself
12  Using Arduino / Microcontrollers / Re: Cheap Chinese clone: Programmer not responding on: September 16, 2014, 01:41:20 pm

<wild guess>
maybe the boot loader and the sketch use (partly) the same memory addresses?
</wild guess>
13  Using Arduino / Storage / Re: HOW DO I STORE IN EEPROM longer BYTES on: September 16, 2014, 01:29:41 pm
split the int in two bytes  (use  /256  and % 256) and store the low and high part in consecutive addresses
14  Using Arduino / Sensors / Re: Has anyone solved the MAC 31855 high temperature instability problem. on: September 16, 2014, 01:19:32 pm
Did you connect the ground of the Arduino to the Ground of the kiln?
15  Using Arduino / Sensors / Re: Laser emitter: KY-008. Is it eye safe? on: September 16, 2014, 01:14:27 pm
Lasers are never safe, even a safe (low power) laser can fail in such a way it becomes unsafe.
Pages: [1] 2 3 ... 945