To begin with, this Simple FET Preamplifier Circuit works like super booster for small sound, as it uses special transistor, FET to make quiet sound go more loud. Also, this circuit is very good, because it uses two kind of transistors N channel FET and PNP bipolar, together they make sound strong and not bad. […]
Mini Projects
Simple Contactless 220V Phase Detector Circuit using IC 4017
In this post we will see how to make Simple Contactless 220V Phase Detector Circuit using IC 4017, as this small tool help to check wire or cable if current is inside or not without touching it. Also, this circuit is very useful for electrician to find problem in big electric system; if current is […]
Simple Shadow Detector Security Alarm Circuit
This Simple Shadow Detector Security Circuit is like one guard with very sharp eyes, which uses one light sensor like photodiode to look shadow in one place. If something stop the light and make shadow, then the circuit think someone is there and start an alarm; alarm can be loud sound, blinking light or something […]
Simple Temperature Meter Circuit
Simple Temperature Meter Circuit is like small detective for heat, as it use special sensor like thermocouple or thermistor to feel heat near it. Here, the sensor can be small part or smart chip like LM35 or LM34 which change heat into electric signal; then circuit take this signal and confirms how much hot or […]
Simple Radiation Sensor Circuit
Simple Radiation Sensor Circuit is like small spy for rays which one cannot see, it can smell different radiation like from light bulb, electromagnetic, or X-ray (ionizing one) etc. Furthermore, this circuit have special sensor when radiation detects sensor feels it and send signal. The circuit then uses that signal to modify things such as […]
Simple USB Reading Lamp Circuit
Simple USB Reading Lamp Circuit is like small power house for ones book reading; as it helps to make small lamp easy to carry and it take power from USB port like from computer, laptop or power bank also. Also, this small lamp give light when one wants to read book or need more light […]