This is simple and useful mini project for Touchless Dustbin Circuit using Arduino Uno and Ultrasonic Sensor. It is called smart dustbin or automatic dustbin. In normal dustbin we have to touch lid by hand which is not hygienic. In smart dustbin the lid opens automatically when person comes near. It uses Arduino, ultrasonic sensor […]
Sensors and Detectors
Buzzer Alert at 0°C Indicator Circuit
In winter season, water and surrounding air can go below zero degree. At that time it is useful to have a small alarm which tells us when temperature goes near freezing point. This Buzzer Alert at 0°C Indicator Circuit uses thermistor sensor, one op-amp IC and a piezo buzzer to make sound alarm when temperature […]
Ultrasonic Blind Stick Circuit using Arduino
Blind people have big problem on road because they cannot see object in front. To solve this we made an Ultrasonic Blind Stick Circuit using Arduino Stick can sense object and buzzer which make sound to warn blind person. This project is with low cost and easy to build with parts like Arduino Nano, ultrasonic […]
Simple Humidity Level Detector Circuit
Humidity is presence of water vapor in air or soil. 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 few parts and gives LED indication when humidity crosses a level. It can be used to test soil […]
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. 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 OFF […]
Magnetic Proximity Switch Sensor Circuit
Magnetic Proximity Switch Sensor Circuit can feel magnetic field. It is used in factory, security and automation. Main part is magnetic reed switch as sensor. ICs like 555 timer and CD 4013 flip-flop turn relay ON/OFF when magnet is close by. Relay control other device ON/OFF. Circuit need stable 12V power for good working. Circuit […]