Smart Water Tap Without Using Microcontroller

The Smart Water Tap system operates entirely through hardwired discrete logic and analog sensing, completely bypassing the need for a programmable microcontroller. The core of the system relies on two infrared (I.R.) sensor modules that continuously monitor the area beneath the water pipe and tap. When the first I.R. sensor detects the presence of hands or a container, it generates a low-voltage trigger signal. This signal is fed into a 2-channel relay board, which acts as an electromechanical switch. Upon receiving the trigger, the relay changes state, allowing power from the 12 to 24V AC-to-DC power adapter to flow directly to the solenoid valve. Once energized, the solenoid valve opens, allowing water to flow freely through the pipe. A second I.R. sensor module is strategically positioned to monitor the fill level or presence of the container; when the target condition is met, it sends a complementary signal to the second channel of the relay board. This action cuts off power to the solenoid valve, instantly closing it and stopping the flow of water. The entire circuit is powered by a combination of a 5V DC battery to run the sensitive sensor and relay logic, and the higher-voltage adapter dedicated to driving the heavy-duty solenoid valve. By routing signals directly from sensors to relays, the system automates water dispensing reliably without writing a single line of software code.