Keeping track of temperature is important for a lot of things but sometimes it does not need a fancy computer to do it. This article discusses how to build a simple temperature sensor with an LED light using a common chip called the IC LM35. It only uses a few parts and does not need […]
Simple Soil Dryness Detector Circuit
Like humans plants to require water to be strong and healthy! Knowing when to water the plants might be little challenging. The construction of a soil moisture sensor is explained in this article. When the soil becomes dry and need watering this device will give an alert. To assist in construction the circuit the post […]
Simple Adjustable Power Supply Circuit using IC LM338
Many electronic devices need a steady flow of clean DC power to work well. This post teaches how to build a circuit that turns messy DC power into a smooth adjustable DC power using a common chip called the LM338. This circuit can take an unsteady DC voltage anywhere from 5 to 34V and turn […]
Simple MIC Preamplifier Circuit using an Op-Amp
This article explain how to build a microphone amplifier circuit using a chip called the IC LM358. Regular microphones have very weak signals and this amplifier makes them much stronger. This circuit is better than simpler designs because it uses a special chip called an operational amplifier op amp. This makes the signal stronger without […]
Simple Wireless Power Transmission Circuit
Wireless power is not an original idea, Nikola Tesla even experimented in it in the past! Many products including phones, electric toothbrushes and even certain medical equipment are now wirelessly charged. However there is always space for improvement. This post covers how to assemble a simple wireless power transmitter and receiver circuit using readily available […]
Simple Wireless LED Light Circuit
These days wireless charging is present in everything from the phone to advanced medical equipment. This article demonstrates how to use a common chip known as the IC 555 to construct a simple wireless LED light circuit. Without using any wiring it will illuminate an LED to demonstrate how wireless charging operates! What is a […]