Edit: This is a new version of the circuit. The difference between the two is the way the switches are wired. The previous version would "leak" a little power from the 5v supply to ground, every time the switch was pressed. In my tests, pressing the button would cause the arduino to lose all power! It would recover once the switch was released. This version uses the internal pull up resistors. Setting the pinMode, use pinMode(pinnumber, input_pullup). Reading the pin, causes the output to be reversed. (Ie: a zero is received, when the switch is pressed, instead of a one.) Still working on the switch code, will update when its ready.
The circuit lines are color coded. Red lines are voltage (5v). Blue lines are ground. Green lines are receive. Purple lines are transmit. There is a "Load / Run" switch in the HC-05 power line. This disables the HC-05 so programs may be downloaded without dismantling the box every time.
The Arduino and HC-05 images were hand drawn by me. Here are the blanks available:
These images are free for any use. No challenge to any copyrights intended.
Enjoy!
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