Saving water is important, and electronics can help. This guide shows you how to build a simple water level indicator circuit yourself. It uses common parts and is much cheaper than buying one in a store. This circuit uses LEDs to show you how much water is in something like a tank or barrel. It […]
IC LM35 Temperature Indicator Circuit
Keeping track of temperature is important for a lot of things, but sometimes you do not need a fancy computer to do it. This guide shows you 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 […]
Simple Soil Dryness Detector Circuit
Plants need water to grow healthy and strong, just like people do! It can be tricky to know when to water your plants, though. This article shows you how to build a soil moisture sensor. This device will tell you when your soil is dry and needs watering. The guide even includes some easy to […]
Simple Adjustable Power Supply Circuit using IC LM338
Many electronic devices need a steady flow of clean DC power to work well. This post shows you how to build a circuit that turns messy DC power into 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 shows you 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 […]
Simple Wireless Power Transmission Circuit
The idea of wireless power is not new Nikola tesla even experimented with it way back when! Today, we use wireless charging for all sorts of things, like phones, electric toothbrushes and even some medical devices. But there is always room for improvement. This article will show you how to build a basic wireless power […]