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1  Forum 2005-2010 (read only) / Troubleshooting / mbp connection problems (usb) on: May 26, 2010, 03:28:55 pm
hi,

i was running my arduino Duemilanove on my older mbp with a powered usb-hub before (yesterday). now when i connect it to the usb-port directly it doesn't work, but also not if there is an additional 7,5 volt power source for the arduino...
on my new mbp it runs pretty well from the usb-port...

any hints?
thanks
2  Forum 2005-2010 (read only) / Troubleshooting / Arduino Mini + BlueSMiRF(BT) + Maxuino on: April 27, 2007, 12:34:59 pm
Hi,
i have some problems to get my arduinomini working with BT and Maxuino (pduino ported to max). after uploading the pde-firmware (with the usb-connector) i have no problems to talk to the mini at all via maxuino. but when i want to use the bt-modem, there seems to be no data-transfer. i power the modem and the mini from the usb-connector and connected the modem to the mini described as in the tutorial. If i choose the bluetooth-modem from the maxuino, it shows the red light, which means it should be working, and the status led of the mini flickers. but i am not able to read data-input or switch the led on.
thanks for any hints
3  Forum 2005-2010 (read only) / Interfacing / Re: How to use a handcrank to control video playback on: December 30, 2010, 06:05:28 pm
i once did sth. similiar with a griffin powermate - no arduino needed. did the programming in maxmsp, but sure QC, Processing, vvvv... are also options. quite simple with this usb-device (works very well with the drivers), and i think might be even cheaper in this case...

http://www.griffintechnology.com/products/powermate
4  Forum 2005-2010 (read only) / Interfacing / Re: arduino + standalone mediaplayer on: December 30, 2010, 12:06:30 pm
Hi James & Pete,

thanks for your reply!
You are right, my question is too general, that's partly because i have no specific project in mind right now. but when i browsed the playground & other forums i was wondering that I never found something about playback of simple videos triggered by arduino... Sure, you find examples how to use arduino to create video or how to connect to a multimedia computer, but i think it would be great for many people to have a simple possibility to trigger video / audioplayback in a simple, cheap & reliable way. Example project (very simple): you have 4 buttons and each button triggers one different video on a screen (with vga or svhs input). It is easy to do sth like this with multimedia computer, another possibility i used before is via infrared-remote control of a dvd player. So next time i would do the playback probably again via infrared and a dvdplayer, but i just thought the task is so common, that there should be some examples of connecting standalone videoplaybackdevices with microcontrollers.

But probably not?
5  Forum 2005-2010 (read only) / Interfacing / arduino + standalone mediaplayer on: December 30, 2010, 06:32:51 am
Dear All,

is anybody aware about the possibility to trigger videoplayback via an arduino without the additional use of a pc?
i want to playback video (resolution at least pal) from a standalone mediaplayer. to trigger more or less synchronized playback of multichannel video i used some years ago the arduino as an infrared remote control for dvd-players, but i am wondering if in the meantime there might be some solutions to connect arduino directly to standalone mediaplayers? i searched the forums & playground, but didn't find anything related, so i hope that i am not doubleposting...

thanks for any tips

tobias
6  Forum 2005-2010 (read only) / Interfacing / Re: Detect if Power Supply (4.5 V) is on with InputPin on: December 15, 2008, 07:57:56 pm
thanks mike,

i want to do it the way as you suppose. i just want to know if a power supply is active or if not, and therefore i want to connect it with a digital input pin, while connecting its ground with arduino ground.
7  Forum 2005-2010 (read only) / Interfacing / Detect if Power Supply (4.5 V) is on with InputPin on: December 14, 2008, 01:06:27 pm
Hi,
i use five PIR Motion sensors (used for switching lamps on, 230 Volt) in a very far distance and want to get their status into the Arduino (if they are on or off). My idea is, to connect 4,5 Volt Power Supplies with them (instead of 230 Volts-lights) and detect with the digital input pin of the arduino if they are on or off. So i want to connect the five power supplies into the digital input pins. My Question is: Is this possible, and if yes, do i need any resistors also, or do i have simply connect the +wire of the powersupply with an InputPin and the -wire of the powersupply with a groundpin of the arduino?

Thank you very much,

tobias
8  Forum 2005-2010 (read only) / Interfacing / Re: dimming ccfl's on: March 04, 2008, 01:31:30 pm
hi, so is it possible to control analog voltage with a transistor or doi need another components?



thanks
9  Forum 2005-2010 (read only) / Interfacing / dimming ccfl's on: March 03, 2008, 08:53:11 pm
hi,
i want to dim some ccfl's. they are dimmable with 12-15 volt before the inverter. can i use a transistor (that gets 15Volts input) and control it with pwm to get sth. between 12 and 15 volts, or do i have to go abother way?


thanks for help
10  Forum 2005-2010 (read only) / Interfacing / Re: motor and mechanics on: April 24, 2007, 11:36:34 pm
great link! exactly what i have been looking for. Thanks a lot!
11  Forum 2005-2010 (read only) / Interfacing / motor and mechanics on: March 26, 2007, 02:37:01 am
Hi, i am quite new to electronics, and so it is a lot of fun to me to see (and hear) my first motors running. It is like i had missed sth in my childhood and now i spent hours sitting on the beach just listening to them.
now as my next step i try to do sth with them. there are quite a lot of ressources in the net about electronics and microcontrollers, but i googled for hours and didn't find any introductions for what to do with them, certainly because i have the wrong keywords...
so if anyone could suggest some links or books, i would be very thankful (which kind of gears, how to connect, how to build a stable rotary plate....., sth. like in the end of chapter 10 in the "Physical computing" book, but more elaborated)

tobias
12  Forum 2005-2010 (read only) / Interfacing / Stepper Motor Igoe Example on: March 19, 2007, 04:31:43 pm
Hi,
i am new to electronics, but i tried to get a good start with the "Physical Computing" book.  
I want to do the bipolar stepper motor example with h-bridge (it's also online: http://www.tigoe.net/pcomp/code/archives/picbasic_pro/000245.shtml ) with arduino, but i have some questions left:
- what all do i connect to ground, since i am using a external power supply for the motor:
only the arduino ground, or also the external power supply ground (do i have to use it at all, or only its positive connection)?
- i have got a 5017-935 stepper motor from scotts valley, it tells me dc 8.4 V, but i downloaded also its data sheet, and this tells me that its phase voltage should be 6 VDC???
- the code-example for the arduino tells me to use outputs 8,9,10,13 on the arduino(=inputs in h-bridge). Do they correspondend to the wires 1, 2, 3, 4 (yellow, white, blue, red) from the motor, that go to the h-bridge-outputs (that means input 1 in h-bridge should be d8 at arduino, and output 1 in h-bridge the yellow wire)
 
thanks for any help
 
tobias
13  Forum 2005-2010 (read only) / Interfacing / Re: STEPPER MOTOR->another question on: March 19, 2007, 01:48:21 pm
Hi,
i am new to electronics, but i tried to get a good start with the "Physical Computing" book.
I want to do the bipolar stepper motor example with h-bridge (it's also online: http://www.tigoe.net/pcomp/code/archives/picbasic_pro/000245.shtml ) with arduino, but i have some questions left:
- what all do i connect to ground, since i am using a external power supply for the motor:
only the arduino ground, or also the external power supply ground (do i have to use it at all, or only its positive connection)?
- i have got a 5017-935 stepper motor from scotts valley, it tells me dc 8.4 V, but i downloaded also its data sheet, and this tells me that its phase voltage should be 6 VDC???
- the code-example for the arduino tells me to use outputs 8,9,10,13 on the arduino(=inputs in h-bridge). Do they correspondend to the wires 1, 2, 3, 4 (yellow, white, blue, red) from the motor, that go to the h-bridge-outputs (that means input 1 in h-bridge should be d8 at arduino, and output 1 in h-bridge the yellow wire)

thanks for any help

tobias
14  Forum 2005-2010 (read only) / Exhibition / installation about alternative lightssources on: April 14, 2008, 11:05:55 pm
Audiovisual installation dealing with bioluminescence, chemieluminescence and fluorescence. 2 arduinos are used to dim ccfl's, get sensor data and trigger solenoid (via firmata/maxuino). Presented at Luminale Frankfurt 08.

best

http://www.tobiasrosenberger.de/Eng/Projects/Coldlights1.html
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