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181  Forum 2005-2010 (read only) / Interfacing / Re: problem with 12v fan on: February 27, 2010, 04:08:04 am
richard, was only the fan broken, replaced with another one and it works smiley-grin

i'm hiding from evil monkey ...

182  Forum 2005-2010 (read only) / Interfacing / Re: problem with 12v fan on: February 26, 2010, 01:36:33 pm
no problem, solved.
183  Forum 2005-2010 (read only) / Interfacing / problem with 12v fan on: February 26, 2010, 12:10:07 pm
i'm trying to controll a 12v fan, but seems that this not work... circuit 1 is the one with fan and dont work, circuit 2 is with 5vcc and led and works ...

184  Forum 2005-2010 (read only) / Interfacing / Re: Interfacing with RC 40mhz on: February 20, 2010, 09:50:39 am
im half lucky, no blob epoxy for me, but the only ic ive got its in a dip16 without anything written on it ... (same thing that happend with the ir remote), this suck me a bit ... i can see a crystal on the board, a coil, a brunch of transistors and the common spread of condensator and resistance...
and i'm a poor guy, no oscilloscope for me smiley-sad i just got the n00b arduinoscope
185  Forum 2005-2010 (read only) / Interfacing / Re: Interfacing with RC 40mhz on: February 19, 2010, 07:05:56 pm
i dont want to use the original rc remote, i wanna build one brand new with arduino and radio transmitter. otherwise i would just use 2 digipot to replace the 2 joystick. i wanna read the signal from the remote, get the algorithm with they encode the 2 pad position into a rf signal, and reproduce it with my arduino. i already did it with an ir remote elicopter, now i wanna try with an rf@40mhz and i was wondering what do i need to read signals and to reproduce em at the right frequency
186  Forum 2005-2010 (read only) / Interfacing / Interfacing with RC 40mhz on: February 19, 2010, 06:05:14 pm
Hi,
i was wondering how to interface arduino with an rc copter that use 40mhz radio controll, any idea on how can i start ? id like not to use the original rc controll, but just arduino + rc transmitter !
187  Forum 2005-2010 (read only) / Interfacing / DC motor control on: February 12, 2010, 07:28:42 am
Hi,

i'm building up something to controll an rc car with 2 dc motor, i'm facing a lil problem, i'd like to controll the rotating speed of this motors, not with precision, just need something to make em run at variable speed, i'm wondering what i can use...
digital potentiometer ? voltage regulator ? what ? smiley-grin
188  Forum 2005-2010 (read only) / Interfacing / Expanding Arduino on: February 09, 2010, 07:06:13 am
i need to controll over than 64 output with my Mega, i got some MPC506 at home, would they suit for this or they can work just as 16 input expander ?
189  Forum 2005-2010 (read only) / Interfacing / Re: Emulate potentiometer. on: February 06, 2010, 08:23:57 am
no info, just got the rc in my hand. im gonna debug it as soon as it arrive @ my home.
190  Forum 2005-2010 (read only) / Interfacing / Re: Emulate potentiometer. on: February 05, 2010, 10:53:01 am
better ways that i found is to emulate the radio\ir signal.. but tooks a while to do it ... or you know a faster way ?
191  Forum 2005-2010 (read only) / Interfacing / Emulate potentiometer. on: February 04, 2010, 11:31:00 am
Hi all,

i need an idea, i have to interface my arduino with an RC joypad that uses potentiometer to drive signals.

like this one ( http://www.twisterstuntcars.com/rchelicopter/rchelicopter.jpg )

one pad have 1 axis pot. the other one have 2x1axis combined, i have to interface my arduino to this joystick to drive an rc car by serial data. i know that i may reproduce radio signals without connecting to the joypad, but this way seems quite faster.

now my question is, how do i emulate potentiometer with arduino ? using analogWrite with max value as max value is the pot output ? ( if the use potentiometer connected to the vcc and not to something else...)

some of ya already experienced something similar ?
192  Forum 2005-2010 (read only) / Interfacing / Photodiode on: January 26, 2010, 02:45:01 pm
Hi,
i'm trying to interface my arduino mega with a photodiode (BPW41), but i was wondering how to connect it to the arduino ...

i saw on a wiki that this photodiode needs to be be reverse biased

someone knows how to get it to work ? (maybe links or a scheme would be very apriciated)

and, when i have to interact with it, what could i read ? HIGH level when he got ir beam and LOW when ir goes out ? how could i trace the data value to make something like a sensitivity regulation ?

thank you all smiley
193  Forum 2005-2010 (read only) / Interfacing / Re: Relay problems on: January 26, 2010, 10:12:59 am
done smiley-wink working smiley-wink tnx smiley-wink
194  Forum 2005-2010 (read only) / Interfacing / Relay problems on: January 26, 2010, 07:31:13 am
Hi, i'm trying to interface my Arduino Mega with a 6v relay with an external power suply, actually i'm trying in this way:

A1: arduino digital pin
R1: 1 kOhm
R2: 330 Ohm
D1: 1N4007
Q1: 2N222A

i've bridged arduino gnd and power suply gnd.

withou the relay and D1, led blinks without problems, when i attach em, everything stop working smiley-grin

Code:
int transistor=53;
void setup(){
  pinMode(transistor,OUTPUT);
}
void loop(){
  digitalWrite(transistor,HIGH);
  delay(1000);
  digitalWrite(transistor,LOW);
  delay(1000);
}




any idea to get it to work ? smiley-grin
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