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 […]
Security and Protection
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 […]
Automatic PIR Motion Sensor Light Circuit
This project explains about a complete Automatic PIR Motion Sensor Light Circuit, it is very useful for home and outdoor lighting, because the circuit uses a PIR sensor. Whenever the PIR sensor detects motion, it turns the light ON automatically and after a preset delay, it turns the light OFF, saving power and reducing human […]
Simple PIR Sensor Timer Circuit using Transistors
This article presents a simple PIR sensor timer circuit using transistors; the circuit costs little, is easy to build, and operates from a 12 V DC power supply. When the PIR sensor detects motion, the output stays ON for a preset time and then turns OFF automatically after the delay, hence, this feature makes the […]
Transistor Based Bicycle Tail Light Flashing Circuit
This project presents a simple transistor based bicycle tail light flashing circuit; the circuit primarily functions as a bicycle tail light and operates from a low voltage battery, making it suitable for portable use. Moreover, the circuit uses very few components, because of this its easy to build and also, power consumption is low and […]
PIR Sensor Motion Alarm Circuit Transistor and Relay
Nowadays, security is very important that why homes and shops need protection; so to safeguard this motion sensor circuits are useful. The PIR Sensor Motion Alarm Circuit with Transistor and Relay is simple because it uses only a few components, costs very little, and is easy to build. The circuit works using a PIR sensor […]