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by neurom4nc3r
Fri Feb 21, 2014 12:31 pm
Forum: Beginners
Topic: Live audio streaming
Replies: 1
Views: 498

Re: Live audio streaming

first of all, take a look into the log files
by neurom4nc3r
Fri Feb 14, 2014 12:46 am
Forum: Automation, sensing and robotics
Topic: MQ-2 Smoke Sensor
Replies: 4
Views: 5082

Re: MQ-2 Smoke Sensor

Overloading the output? I just connected an 3-5V buzzer in the DOut (TTL)! I already tried with a LED too! I've read in the datasheet that when sensor have presence of smoke, this output pushes a High signal. And in the Analog output (AOut), pushes a variable tension between 0-5V. I really don't kno...
by neurom4nc3r
Thu Feb 13, 2014 3:07 am
Forum: Automation, sensing and robotics
Topic: MQ-2 Smoke Sensor
Replies: 4
Views: 5082

MQ-2 Smoke Sensor

I've set a 3-5V buzzer and a LED in the DOut and in the AOut respectively. But when i put a smoke or alcohol near to the sensor, nothing happens. There's a embedded led in the sensor that lights red always when i plug something to DOut. Somebody have a idea what i did wrong? Here's the sensor: http:...
by neurom4nc3r
Sat Feb 08, 2014 8:14 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Also digit numbering starts from 0 so a 4 digit display is using digit drives 0 to 3 on MAX7219 or MAX7221. This is common engineering and computing method. Your circuit diagram needs to change to match. Well, let's go: * Yes, i've changed the wiring again to start counting from dig0 - dig3 (max721...
by neurom4nc3r
Sat Feb 01, 2014 3:48 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Hehe ok, don't worry my friend. My "customer" always do that too. Very well, updating the topic, i've changed the positions on my breadboard for the 3rd time. The display now turn all digits ON when i run the code ( the original one , published by @agent57), BUT, this only happens when i take away t...
by neurom4nc3r
Fri Jan 31, 2014 8:47 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

I bought few days ago another max7219 from a different batch. Still waiting it to arrive. But, as you said @techpaul, the problem can be another one
by neurom4nc3r
Wed Jan 29, 2014 5:57 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Try running the software with NOTHING connected to GPIO. The software will run fine that way as it is driving outputs. Tell us if you get errors that way after running several times and what speed your Pi is set to. @techpaul, My Pi is set to 700mhz speed (default) I already disconnected all the GP...
by neurom4nc3r
Tue Jan 28, 2014 4:01 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

@neurom4nc3r Ok, so we know a single LED works. Next thing I'd do is try to control that same single LED via the max7219. Ignore the seven segment display for now. On the max7219 : max7219 pin 1(data) --> pi gpio 0 max7219 pin 2 --> LED negative max7219 pin 4 / 9 --> to pi gnd max7219 pin 12(load) ...
by neurom4nc3r
Tue Jan 28, 2014 4:12 am
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Hello, I'm the guy behind that code you found. I can report its working fine here. My Raspberry Pi has been sitting on my desk displaying the time (as well as doing other things) for about a year now. To turn test mode on using that code : MAX7219Send(15,1); My clock just lit up! It's been a year s...
by neurom4nc3r
Sun Jan 26, 2014 2:32 am
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

hi techpaul, sorry but i really don't know how to send the "0x0F01" command to the IC. I just know that 0x0F represents the "test mode" register of max7219, so, I send to this register the 1 (high) value. I'll be glad if you or someone post a example code here. Nevertheless I've tested the DC voltag...
by neurom4nc3r
Fri Jan 24, 2014 9:19 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Hi there again, I've disconnected almost everything in the protoboard leaving the 7 segments display alone. Connected 5V through 10k + 10k resistors to the pin 18 of max7219. Sent the command to put this IC in the test mode (0x0F). Unfortunately without success. I start to think that the max7219 doe...
by neurom4nc3r
Fri Jan 24, 2014 6:51 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

The diagram show no power or brightness setting resistor for a start Are you using a MAX7219 or MAX7221 the interfaces are different (slightly) What 7 segment display are you using? The device is meant to drive a Common CATHODE display You appear to have missed off the Rset resistor between V+ and ...
by neurom4nc3r
Fri Jan 24, 2014 6:03 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

I've made the following wiring (save the image or drag and drop to another tab to view in large size): http://bimg1.mlstatic.com/display-7-segmentos-4-digitos-max7219-p-arduino-pic-etc_MLB-F-4122548372_042013.jpg Where do you read "arduino's pins, you should read: Arduino Pin 12 = Raspberry Pin 3 (g...
by neurom4nc3r
Thu Jan 23, 2014 6:18 pm
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

Re: MAX7219 and 7 segments 4-digit Display

Douglas6 wrote:Yes, I've done this, and I even have a pretty Fritzing diagram of the wiring. Unfortumately I won't be able to get to it until this weekend, but I'll post it here then. Ping me again if I forget.
Man, certainly you'll help a lot doing this! I'm desperate =/
by neurom4nc3r
Thu Jan 23, 2014 11:12 am
Forum: General discussion
Topic: MAX7219 and 7 segments 4-digit Display
Replies: 29
Views: 18753

MAX7219 and 7 segments 4-digit Display

Hi there,

i'm trying to put a 7 segments 4 digit display with a max7219 controller but i cannot find a way to wire correctly the max7219 to the display. The raspberry wiring to the max7219 is already done.
Does anyone know how to put them working?

thanks a lot
by neurom4nc3r
Thu Jan 23, 2014 3:55 am
Forum: General discussion
Topic: Smoke detection sensor
Replies: 1
Views: 1051

Smoke detection sensor

Hi, I would like to buy a Smoke detection sensor to add in my monitoring project. Searching the google I find the MQ-2 as the better option (is that true?) to attend my needs because it have a good smoke/fire detection and of course, a digital output. Here is the sensor: http://store.fut-electronics...
by neurom4nc3r
Thu Dec 19, 2013 5:34 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Doubt about GPIO Pins
Replies: 3
Views: 1304

Doubt about GPIO Pins

Sorry about the noob question, but after all, how much GPIO Pins is possible to use in board B rev.2? Only eight?
I also can use the I2C or UART pins to simply control leds or push buttons? Or a GPIO expander like PiFace is mandatory?


thanks
by neurom4nc3r
Thu Dec 12, 2013 10:25 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

The hub you are plugging it into is a full-speed hub. The LAN dongle is a high-speed device. [79079.851828] usb 1-1.3.3.3: new full-speed USB device number 8 using dwc_otg [79079.955840] usb 1-1.3.3.3: not running at top speed; connect to a high speed hub It appears that the wireless dongle does no...
by neurom4nc3r
Thu Dec 12, 2013 3:07 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

I just wanted to run hostapd (to make a wireless hotspot) with a good signal strenght...
I thought that the problem was about energy (i have a 5V 1A power supply) just for this reason i've bought this powered usb-hub.
I'm actually using the raspbian as OS, i should try another one?
by neurom4nc3r
Thu Dec 12, 2013 2:56 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

After plugging / unplugging the wifi dongle from the hub port, can you post the entire output of dmesg - then do the same with it plugged directly into the Pi? When i connect the wireless dongle into usb-hub: [79079.851828] usb 1-1.3.3.3: new full-speed USB device number 8 using dwc_otg [79079.9558...
by neurom4nc3r
Thu Dec 12, 2013 2:16 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

Is your wifi dongle set to automatically associate with the Wifi access point and is this on the same network as your SSH connection (which I assume is wired)? Hi! No, by default, the interface is configured to do not connect automatically to any network. As i said before, the dongle works normally...
by neurom4nc3r
Thu Dec 12, 2013 1:47 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

@OP: How are you communicating with the Pi - USB keyboard/mouse or SSH?
Through SSH
by neurom4nc3r
Wed Dec 11, 2013 4:58 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Re: Wireless Dongle + USB HUB

DeanC wrote:Have you tried the dongle with the RPi without the usb hub to see if it works?
Hi, thanks for reply

Yes, I already tried! It works fine (BUT the signal strenght is TOO weak!).
When i put it to work in my linux virtual machine on a standard pc, the signal level has increased considerably.
by neurom4nc3r
Wed Dec 11, 2013 3:45 am
Forum: Troubleshooting
Topic: Wireless Dongle + USB HUB
Replies: 14
Views: 2897

Wireless Dongle + USB HUB

Hi there, I got a 5v 1A powered "7-ports usb hub" and a wireless dongle (cisco linksys wusb54gc). I want make a wifi hotspot with an acceptable signal strenght! When i connect the dongle to the hub, the raspberry pi doesn't work properly: With the command lsusb i can see normally the following outpu...
by neurom4nc3r
Fri Dec 06, 2013 2:43 am
Forum: Troubleshooting
Topic: PiFace With a fried RPi GPIO pin
Replies: 2
Views: 633

PiFace With a fried RPi GPIO pin

Is mandatory to PiFace work properly, that the all raspberry pi GPIOs must be working fine? I'm asking that because i got the GPIO pin #13 fried, and i need to buy a Piface to expand the numbers of I/O interfaces. But i don't know if i'll have problems connecting it (piface) to my Raspberry board. t...

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