This article teaches how to build a flashing LED light for 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 creating […]
3 LED Battery Voltage Level Indicator Circuit
A healthy battery is important for the car or any machine with a battery to run well and avoid problems. This post shows how to build a tool that checks the battery voltage and informs if it is low, good or overcharged. It works with most 12V car batteries but with a small change one […]
How to Make a Simple LED Bulb Circuit
LED lights have gained a lot of popularity recently. Another name for them is LED bulbs or solid state lighting. Due to their significant lower power consumption i.e between 0.5 and 3 watts compared to other bulbs these lights are excellent for reducing electricity costs. These bulbs were not as bright as some ten year […]
Simple Li-ion Battery Charger Circuit using LM317 IC
Do any one wants to make their 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 how to build a simple charger using a common chip called the IC LM317. We will also discuss about […]
How to Build a Two LED Temperature Indicator Circuit
The article explains how to build a cool circuit that indicates temperature using two LEDs. It is used in various kind purposes such as: Checking the water showers temperature to prevent damage Ensuring that the computer parts, amplifiers, heaters and even the water tank used in the car do not overheat. What is a Two […]
Simple High Voltage Fence Charger Circuit
The construction of a simple electric fence charger is discussed in this post. It is a cost effective and safe method of keeping wild animals out of the fence and pets within. Because it is less expensive and simpler to maintain, as it is good option against standard fence. WARNING: Electric fences can be deadly […]