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Controlling an Arduino with a standard RC transmitter/receiver



Controlling an Arduino with a standard RC transmitter/receiver

There are many ways to remote control an Arduino, Xbee, RF link, IR…

I decided to try and use something I had laying around and that is common among large group of hobbyist : RC transmitter and receiver pair


Bluetooth module worth keeping?


Well here is the problem, I have a Bluetooth module and I did use it on a previous bot, but it had a library specifically for that module so I was only copying a pasting code to get it working.

Looking for a cheap long range distance sensor.


Would anybody know of a cheap long range distance sensor? 

Something with a max distance of 2.5 to 3 meters. It would be for my nitro rc car, I dont totally trust my radio system so a distance activated fail safe would be really reassuring!  

Accuracy isn't ran issue, but price is. 


Thank you in advance! 


Controllable battery charger based on max712


Well here it is!! My attemps at building my own battery charger using a sample of the max712, here is the original post that inspired me, http://letsmakerobots.com/node/9272 and special thanks to ezekiel181 !!! 

Can these displays be controlled by a Picaxe?

I found these 2 displays in an old cd/casete/radio combo and was wondering if they were worth keeping, 
and if they could be controlled using a Picaxe.
I know that a picaxe can control a display buy using a serial interface but these ones dont have that,
they have about 30 pins, not including the ones for the back lite. 

A IC form of NPN transistor ?

Is there  such thing as a DIP package of transistors ? (not sure if that is the right way to put it) 
I need to control 12 digital connections and putting 12 transistors on a PCB will take up a decent amount of space 
so I was wondering if there is a chip like version.
If possible a high voltage ~40V and high amperage trnasistor would be perfect it it exists. 

Salvaging an old motion triggered light

The other day I found this in our local garbage dump:




I have been trying to figure out its wiring diagram using a multimeter.


Encoders for servo mounted wheels

I have 2 questions, 
- First, when using a C-stamp (programmed using MPlab) is it possible to track the movement of a continus rotating servo so that I dont need to add encoders to know how  much the wheel has turned?  
This is an example of coding that makes 2 servos turn(if it helps):
void goforth(BYTE lp, BYTE rp, WORD t)
  WORD i;
RC via Bluetooth, avoids obsticals
Using a
  This robot comes in a kit from A-wit, the original name is BOL-bot (Board of Learning). http://www.c-stamp.com/CS710003.htm Read more