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Arduino Bluetooth Control Basic Tutorial
Arduino Tutorial - Easy secret knock detector
How to use MQ7 gas sensors whith Arduino+Android App
Set the sensor value to 30 at both lines when I used a normal LDR (mostly in kits or as board)
Hi I couldn't get this to work, the LED will turn on and off if I use arudino serial monitor, and the phones blue tooth finds and connects to the module, there just seems to be no communication between the blue tooth module an the arduino. Ive tried 2 different HC6 modules and with and without the voltage divider. Any ideas?
Can I use a Photodiode instead of an LDR?
Arduino Tutorial - Laser security system
The 4k7 and the 2k2 resistors are a voltage divider to drop the 5V output from the Uno's Tx pin to a lower voltage for the Bluetooth module which is not 5V tolerant. (5x 4.7/(4.7+2.2) = 3.4V)
Ok, I inserted a linck to youtube
How to use gas sensors via bluetooth from Arduino to Android
It is connected to gnd and tx of the HC06 board.
The 4,7k resistor is not connected to anything
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