Looks like devices make sound with no power. But not true. Power come from radio transmitter close by. Radio send waves and device catch waves and use for power. So device do not make sound by itself. But it gets energy from outside. Example: crystal radio in circuit below. COP show how much output power […]
Free Energy is Myths Vs Reality
This article is about Free Energy is Myths Vs Reality and how to understand energy conversation. Some people think energy come from nothing. This is called “free energy.” But science say energy not come from nowhere. This rule name is Law of Conservation of Energy. In this article we will talk about Free Energy is […]
DIY Variable Power Supply Circuit using Arduino
This DIY Variable Power Supply Circuit using Arduino makes changeable power. It uses transistor and resistors to change 9V output from IC 7809 regulator. One 100uF capacitor help clean the output voltage. Two pushbuttons can change the voltage by hand. LCD screen show real output voltage. Coding: Code Explanation: Circuit Working: Parts List: Component Quantity […]
Digital Code Lock Circuit using Arduino
Security is important everywhere in world and is more hard in secret places. This project for Digital Code Lock Circuit using Arduino help make better security. It use Arduino, small computer to make simple lock. With Arduino UNO, keypad, buzzer, LCD (16×2), BC547 transistor and resistors it show how digital code lock work. User must […]
Simple Heartbeat Monitor Circuit using Arduino
In this post we will show how to make Simple Heartbeat Monitor Circuit using Arduino. When we put finger on sensor it count heartbeats per minute. This is important because heartbeat tells doctor about our health. We use Arduino UNO, LCD screen, two buttons, one resistor and heartbeat sensor to build it. Sensor catches heartbeat […]
Simple Servo Motor Controller Circuit using Arduino
Servo motor is small machine part. It can turn to exact position. People use it in many things like robots, CNC machines and factory machines. This post for Simple Servo Motor Controller Circuit using Arduino show how to control servo motor using Arduino. It also use push buttons, capacitors, resistors and IC 7809 for power. […]