Schmitt Trigger is special type comparator. It gives stable switching even if input signal is noisy or slow. We can use 555 timer IC as Schmitt Trigger. This IC is used in many projects. Schmitt Trigger can give two types of output : normal (non-inverting) and inverted square wave. Next we will learn how to […]
Simple Magnet Polarity Detector Circuit using Hall Effect Sensor
Simple Magnet Polarity Detector Circuit using Hall Effect Sensor is important for things like motor control, measuring magnetic field and for teaching. This article show how to use APX9141 Hall Effect sensor to make easy and working magnet polarity detector. Red and blue LEDs show magnet north and south poles and it gives simple visual […]
Simple Arduino FM Receiver Circuit
This project uses Arduino Uno to make Simple Arduino FM Receiver Circuit. Main part is RDA5807M FM radio module. It get FM signal and changes to audio sound. Sound goes through 7809 IC to make louder and then comes out from 3.5mm audio jack. We can listen FM stations and learn basic digital electronics and […]
Build Your Own Door Knob Touch Alarm Circuit
Todays time safety is very important. This Build Your Own Door Knob Touch Alarm Circuit can help protect home and office. This small project is Door Knob Touch Alarm using 555 IC. It can sense when someone touches the door knob. If someone touches then alarm makes loud sound. It scares intruder and warn owner […]
Simple Arduino FM Transmitter Circuit
FM (Frequency Modulation) is a common way to send audio by radio signals. Many people like making FM transmitters with Arduino because DIY electronics is getting popular. In this project for Simple Arduino FM Transmitter Circuit we have used Arduino Uno, KT0803K FM module, 7809 voltage regulator and simple antenna to make FM transmitter. This […]
Simple Micro SD Card Data Logging Circuit with Arduino UNO
Accurate data logging is very important in electronics and data work. This project for Simple Micro SD Card Data Logging Circuit with Arduino UNO show how to use micro SD card, IC 7809 and LM35 sensor to make simple data logger. It saves temperature data to SD card and later we can check data for […]