Blind people have big problem on road because they cannot see object in front; so to solve this we made an Ultrasonic Blind Stick Circuit using Arduino The stick actively senses objects and uses a buzzer to warn a blind person with sound. We can build this low cost project easily using components such as […]
Sensors and Detectors
Simple Humidity Level Detector Circuit
Humidity is presence of water vapor in air or soil, also too much or too less humidity is harmful for plants and for storage; so we need a Simple Humidity Level Detector Circuit. This small circuit uses only a few components and provides an LED indication when the humidity crosses a preset level and we […]
Auto On Off Light Circuit for Washroom
In washroom many time people forget to switch OFF the light because of this there is waste of electricity; so to solve this problem we can make a Auto On Off Light Circuit for Washroom. When someone presses the switch it detects the presence and light will turn ON for some time and then get […]
Magnetic Proximity Switch Sensor Circuit
The Magnetic Proximity Switch Sensor Circuit detects magnetic fields to operate in factories, security systems and automation applications; also a magnetic reed switch serves as its main sensing component. ICs like 555 timer and CD 4013 flip-flop turn relay ON/OFF when magnet is close by and then relay control other device ON/OFF. Moreover, circuit need […]
Sound-to-Beep Circuit using IC CD4049
Sound-to-Beep Circuit using IC CD4049 is a fun project, where we hear whistle which beep for 3 sec; also circuit is good for door alarm, remote control other sound things. Moreover, it has mic for sound, op-amps from CD4049 and transistor for buzzer and it runs on 3V battery. Circuit Working: Parts List: Components Values […]
Simple Dark Sensor Circuit for Security using IC 555 timer
Simple Dark Sensor Circuit for Security using IC 555 timer is useful project for security, it senses low light and turns ON the buzzer or light. Also, the circuit uses an LDR for light sensing and works well in night lights and alert systems. Furthermore, it includes a 555 IC, an LDR, resistors, a capacitor […]