Wireless charging is everywhere these days, from your phone to fancy medical devices. This post shows you how to build a simple wireless LED light circuit using a common chip called the IC 555. It will let you see how wireless charging works by lighting up an LED without any wires! What is a Wireless […]
Red Blue Police Light Flasher Circuit
This article shows you how to build a flashing LED light like police cars use. It uses two common chips called IC 555. These chips are set to different speeds. They are connected to two sets of LEDs wired in a special way antiparallel. This makes the LEDs in each set flash back and forth […]
3 LED Battery Voltage Level Indicator Circuit
A healthy battery is important for your car or any machine with a battery to run well and avoid problems. This post shows you how to build a tool that checks your battery voltage and tells you if it is low, good or overcharged. It works with most 12V car batteries, but with a small […]
How to Make a Simple LED Bulb Circuit
LED lights have become super popular lately. They are also called solid state lamps or LED bulbs. These lights are great for saving money on electricity because they use much less power than other bulbs, typically only 0.5 to 3 watts. In 2010, they were not quite as bright as some other bulbs, but this […]
Simple Li-ion Battery Charger Circuit using LM317 IC
Want to make your own charger for lithium ion (Li-ion) batteries, like the ones in phones and laptops? It can be a fun way to learn how electronics work. This article will show you how to build a basic charger using a common chip called the IC LM317. We will also talk about how batteries […]
How to Build a Two LED Temperature Indicator Circuit
This guide will show you how to build a cool circuit that uses two LEDs to show temperature. It can be used for all sorts of things, like: Checking the water temperature in your shower to avoid getting scalded Making sure your electronics are not getting too hot, like amplifiers, heaters, computer parts or even […]