Another guide how to wire the HCo6 and 4 Channel Relay for switching, The HC06 modules uses BlueCore is a single chip radio and baseband IC for Bluetooth 2.4GHz system including enhance data rates (EDR) to 3Mbps. for more details
Wiring Single Channel Relay with Raspberry Pi on C/Python
Another illustration how to wire the single channel relay with Raspberry Pi. Relays are suitable for driving high Power AC/DC electrical equipment such as home appliances, light bulbs, motors, etc. Mostly popular in industrial and automotive use for automation. By
Make your own sound activated switch on Arduino
In this illustration we will going to wire the microphone module, relay and the Arduino board. These project is compatible on most common microcontroller, the main objective of this project to make a sound activated switch or a clap switch.
Using Password Access Control on Matrix Keypad with Optocoupler Relay
These tutorial will guide you to make a password access control using “Keypad Membrane” connected to a Relay Module, Were just temporarily used LED for the output just to check if it is working, instead using a mechanical solenoid door