Joystick-Controlled Arduino System to Control Home Appliance

This assistive system uses an Arduino Uno to interpret physical inputs from an analog joystick and translate them into control signals for home appliances. The circuit is powered by a mains-connected 230V AC to 9V transformer, paired with a bridge rectifier and 1N4007 diodes to step down and convert AC to a stable DC voltage. An LM7805 voltage regulator further conditions this voltage to provide a clean 5V rail for the digital logic and microcontroller. The user manipulates the joystick, and the Arduino Uno reads the corresponding analog positional values using its integrated analog-to-digital converter. Depending on the input thresholds, the microcontroller triggers specific control paths. To drive the heavier switching requirements, the system incorporates discrete semiconductor stages utilizing BC547 and 2N2219 transistors, alongside LM555 timer ICs configured to manage timing or pulse functions. These driver circuits supply sufficient current to actuate 5V SPDT relays, which provide electrical isolation between the low-voltage control logic and high-voltage AC loads. Status LEDs offer visual feedback during operation, while smoothing capacitors and current-limiting resistors ensure circuit stability across all stages.