This Simple Non Contact AC Mains Voltage Detector Circuit is to find AC voltage without touching wire. It uses antenna to catch AC signal from air. Then signal goes through transistors and LED blink when AC voltage is near. This circuit is good for safety and easy to make at home. WARNING: Even with this […]
Water Level Indicator Circuit
This Water Level Indicator Circuit is a small project to show water level in tank by using 4 LED lights. Each LED tell how much water is inside the tank. When water goes up more LED turn ON. It is easy to make and uses cheap parts. This circuit is good for saving water and […]
IC LM35 Temperature Indicator Circuit
This IC LM35 Temperature Indicator Circuit is small and easy circuit. It uses LM35 chip to check temperature. There are no need of many parts and no need of difficult microcontroller. LED light turn ON when it become too hot or too cold which depend on how we set it. No need of big computer […]
Simple Soil Dryness Detector Circuit
Like human plant also need water to stay strong and healthy! Sometimes it little is hard to know when plant need water. This Simple Soil Dryness Detector Circuit tell how to make soil moisture sensor. When soil goes dry and plant need water this device will give an alert. This article also gives an easy […]
Simple Adjustable Power Supply Circuit
Many electronic things need clean DC power to work good. This post show how to make one easy Simple Adjustable Power Supply Circuit. It changes dirty DC power to clean power and it uses one chip called LM338. This circuit take DC from 5 to 34 volt and gives clean DC from 1.25 to 30 […]
Simple MIC Preamplifier Circuit
This is small and Simple MIC Preamplifier Circuit using an op-amp IC LM358 It uses op-amp to make weak sound from MIC more strong. It is good to record voice or connect to speaker. This circuit is easy to make with not many parts needed. Also it have one knob to control how much it […]