I use CoolTerm on Win 8, works great, has everything you need.

Yes but I would add extra decoupling.

do you mean I shall use two power supplies ?
- one for the arduino board
- one for the motors

what are good compact power supplies and able to supply much current for the motors?
I am thinking of some rechargable battery charged by the arduino board...

[L293D]

Thanks for the recommendation using a Motor Shield.
Four questions about Motor Drive Shield Expansion Board L293D:
- can I change the speed of the motors with L293D ? that means: does this H-bridge contain a transistor?
- assuming I am powering the Arduino board with some battery, can I simply connect the Arduino's VIN to the motor shield's EXT_PWR ? GND is GND anyway, so no connection needed there
- here, there are on the left and on the right each 5 connectors, 2 for each motor, and why is there a GND in the middle of them?
- a disatvantage is, that this module can only be stacked on top of others or directly on the arduino but I cannnot connect wires to the pins because there are no openings on the top. Thus, I would connect the module by only connecting the neccessary pins with male-female wires. That means I need to know which pins are used to drive the motors...

@Grumpy_Mike
so, using the transistor, i can, by supplying pwm signal on it, the amount of current to allow to be passed
that means setting this  pin to high either means *no limit* or *maximum current*. i think the second, because when I connect the motor directly to 5v and GND, the arduino restarts, that means too much current drawn was demanded.
I am using S8050.
So what is the difference between setting the BASE to HIGH , and directly connecting the DC motor to 5V/GND ?

@cr0sh
this is exactly the point, i do not own one at the moment
currently my father uses it and he is away for a longer time, so i thought to make the best for now without out it, in ca. 1 week i can measure the current, no problem

[How is then the power supply concerned if I use a transistor?]

of course it is not designed to do so,
I think of using a motor driver (L293D) because it has built-in flyback diode and is able to drive to motors seperately and reverse the poles, which is exactly what I need. someone knows if it hsa builtin transistors i could not find in datasheet.

and am still uinterested in

@Grumpy_Mike:
1) ok, that's why I am using S8050 transistor, I do not know how much current the motors need, but I think a transistor is the best thing to decide for. How is then the power supply concerned if I use a transistor?

[transistor]

@Grumpy_Mike:
1) ok, that's why I am using S8050 transistor, I do not know how much current the motors need, but I think a transistor is the best thing to decide for. How is then the power supply concerned if I use a transistor?
2/3) I am also using anitparallel diode (flyback diode) and I am going to get a capacitor as well (how much nF are appropiate?)

And I want to stick to the idea of using the board to supply the motor

Hello,

thanks for the answer. At first, I should've asked whether this issue is normal or if I misconfigured something?

1) more voltage? How is that concerned? why does it play a role? I just tested using USB power supply and it works much better, not perfect but really good? why do the batteries with ~ 7 V do not work?
2) to admit, I don't really know that. As far as I understood an expanation I found, using capacitors allows the motors to be first driven by the capacitors which save can some load, because it is diffucult for fragile power supply to give so much current in a short time(?) - I did research here http://electronics.stackexchange.com/a/2310
3) I once have a seen a DC motor having switched a capacitor directly between + and -. Or one that was connected with a capacitor to the motor housing. What noise to surpress then?

Hello,

building a car, I use a DC motor with a transistor (see attached schematics).

However, the ultrasonic distance module (I use one to avoid crashing with walls) outputs weird results when the motor is on. When I just unplug the motor, the ultrasonic distance module gives the very exact result. ultrasonic distance module is connected just 5v-5v, gnd-gnd, trig-12, echo-11 (very normal) and actually is very reliable!

How can I get rid of that issue?

Thanks in advance

I don't see a "tempC" in your loop.
You could also initiate  (e.g. declare)  this var at the very beginning after havign defined the classes instances 

At first you have to know how the signal is transmitted. This includes
- Frequency
- Modulation
- Encoding

So both  the  last  points are about the protocol.

If it is rolling code you mostly still read the message.
Could you please describe what happens and which signal to capture?
And find out as much technical data about the transmitter as possible.

Additionally, I recommend some simple ASK Module from ebay which are very cheap (e.g. ebay nr 121017087078)
Or did you have already any successes with your procedure?

Works like a charm!
Thank you very much

Thank you very much
looking forward to downloading the new version

I still prefer Ctrl+M
Ctrl and Y is very near each other (german keyboard, QWERTZ) so I would need to use the right ctrl-key. It is ok, though

The shortcut CTRL+I prints a tabulator in Notepad, too.

And I prefer using CTRL+some key instead of pressing three keys and what about letting the user change the setting in the configuration file?

[Arduino-keyboard-0.3.hex]

Everything needed is included here
http://code.google.com/p/unojoy/
and here
http://www.atmel.com/tools/FLIP.aspx

Yes the Arduino's USB interface has to be flashed. This is done with Atmel's FLIP tool.
There is a Arduino-keyboard-0.3.hex available here:
http://hunt.net.nz/users/darran/weblog/b3029/Arduino_UNO_Keyboard_HID_version_03.html