Sometimes the water tank becomes full, but we forget to switch OFF the motor, as a result, the system wastes water; so, this simple Transistor Based Water Level Alarm Circuit is useful, as it gives sound alert when water reaches a level. Moreover, the circuit is cheap and easy to build as it uses very […]
Automation Circuits
Digital Code Lock Circuit using IC 4017
Security plays a very important role in todays world, therefore electronic code locks are very useful, as this Digital Code Lock Circuit using IC 4017 is a simple; as it uses push buttons, diodes, resistors, capacitor and IC CD 4017 . Moreover, this low cost circuit is easy to build, operates from a 9 V […]
Darkness Activated LED Circuit
This article explains about a Darkness Activated LED Circuit which is useful device that saves power, also it is energy efficient circuit because light glows only in darkness. The circuit automatically turns the light ON at night and OFF during the day, so we never need a manual switch for daily operation; also the circuit […]
Fan Start 10 Second Delay Timer Circuit
In many homes and industries sometimes a fan does not turn ON immediately, here, a fan start delay timer is a circuit that delays the fan start. When we apply power, the fan remains OFF for approximately 10 seconds and then turns ON automatically. Also, we can easily adjust the delay time if required. This […]
30 Minute Delay Timer Circuit using Transistors
This article explains about a simple 30-minute delay timer circuit that uses transistors, the circuit offers a low-cost, easy-to-build solution. Also, it uses common parts like BC547 transistors, resistor and capacitor and because of simple design, beginners can also understand it easily. Therefore, this 30 Minute Delay Timer Circuit using Transistors is useful for applications […]
Automatic Solar LED Light Circuit
Solar power is free energy and it comes from the sun, it is clean and is renewable, because of this solar lights are very popular today; also this is Automatic Solar LED Light Circuit and it turns ON light at night, and it turns OFF light at day automatically. This circuit requires no switch, making […]