Arduino + Bluetooth module HC05, Serial Communication With LAPTOP? Simple!

Connect Bluetooth module to laptop is quite easy, because there are many open source software available on internet now. If we want to send or receive Data between Arduino and computer, firstly we need to make a Communication link to Definition Arduino Board to the computer. A software called Tera Term to show the data received or what we want to send through it. You can get the software here:

(https://en.osdn.jp/projects/ttssh2/releases/) Arduino support something Called Software Serial , which allow You to change any arduino board pin to serial pin. http://arduino.cc/en/Reference/SoftwareSerial To link your bluetooth module with laptop:

1. power up HC-05 using Arduino
2. for Windows user, go to control panel and "Add Device"
3. the default password for HC-05 is "1234"
4. after pairing up, you can compile and upload the code to Arduino
5. sometimes you may fail to upload the program to Arduino board. Try to disconnect or turn off the bluetooth module while uploading the problem. After that, connect or power up the bluetooth module again.
6. Open Tera term software (have to install it first from the link above), go to file > new connection. From the pop-up window, choose "serial" and related serial port.
7. Congrats, you have done!

Here is my result:

RF 315/433 MHz Transmitter-receiver Module without Arduino? Sure!!

4 Channel RF transmitter + receiver

How to connect this wireless RF module and operate without Arduino? It is POSSIBLE??  I found this way out of sudden, you could say that I am to bore to try everything I bought from China as all stuff just too cheap, made me dare to try without second thought. Yet, the shortcoming was that, since it is non-programmable, it is actually works like sending a "HIGH" and "LOW" through radio wave, that means no analog control!!

Schematic

The most important thing you need is encoder and decoder. For my case, I used RX-2B and TX-2B IC.Just follow this schematic and everything will work. You can also use RX-5B and TX-5B if you want more than 5 channels. Consumed about half an hour to finish this. It can be seen that 2 IC on the receiver side. the left side is RX-2B, right one is L293D, I made this purposely so that I could use on rc car, where forward and backward can be done by connect the motor to L293N directly. MultiPURPOSE!! Lastly, remember to adjust the trimmer on receiver side so that it receives signal from transmitter!  

Receiver tonel board

Receiver and transmitter

Shoud I make an Instructable?