No need to check water with normal stick. This Water Level Indicator Circuit with Digital Display use sensor to check water level. Then it show number from 0 to 9 on small screen, like mini calculator. So we can always see what level the water is in the tank. With this there is no need […]
Long Range FM Transmitter Circuit (2km)
This Long Range FM Transmitter Circuit (2km) send voice or music on FM radio. It can cover up to 2 km range with good antenna. It use small microphone to take sound and then circuit make signal. Signal goes to antenna and any FM radio can catch it. It runs on 12V battery with simple […]
Public Address Amplifier Circuit
This Public Address Amplifier Circuit it works like a very strong loudspeaker for our voice! When we speak on microphone then it makes our voice go very loud because of that many people can hear us good. Good for big place like school, office, stadium or parties where we want all people to hear same […]
30V 1Amp Transformerless Power Supply Circuit
This 30V 1Amp Transformerless Power Supply Circuit works like small adapter for our electronic. It takes normal high voltage electric and change it to low safe voltage to what our devices need. No big transformer is required it uses special parts like capacitor and diode to do the work. Like if we have 30V 1A […]
Simple Flip Flop Circuit
Think about small switches they only do “ON” or “OFF”. Simple Flip Flop Circuit is same like that but for electronics. It stay in two state like 0 or 1. This small switch very important it can remember stuff, keep data and help control what happen next like timing and by coordinating things. We can […]
Simple Entrance Alarm Circuit
This easy and Simple Entrance Alarm Circuit is made to protect door or way where people enter. It makes loud sound when someone walk through invisible IR light. It works good at day and night by not giving much wrong alarm. The circuit is simple and good for hobby people during nighttime. Circuit Working: Parts […]