Think our lights are as a safety friend, this Simple Backup Light Circuit is like a good helper for our lamps, as it have two or more lights and smart system. If one light stop working the other light turn ON by itself and there is no need to stay in dark, it is very […]
Hobby Circuits
Transistor 2N3055 Circuit with 1.5 Million High Gain
Transistor 2N3055 Circuit with 1.5 Million High Gain is like normal volume knob it can make sound more but not too much and if we want very loud like 1.5 million we need to trick it little bit. One way uses two transistors together like a double volume knob. People also call this arrangement a […]
Adjustable Power Supply Circuit using IC TDA2030
This Adjustable Power Supply Circuit using IC TDA2030 can change the voltage it uses small trick which is little bit surprising; because the chip TDA2030 is normally for making speaker sound loud and can also work like voltage controller. With smart circuit design it gives steady DC voltage and we can change output which is […]
Simple 3V to 9V DC Boost Converter Circuit
This Simple 3V to 9V DC Boost Converter Circuit is like a hero for battery. If battery is only 3V like from old remote then this circuit makes it strong by giving it 9V as many device need 9V to work good. So if we only have small battery with low power but still want […]
Simple Cell Phone Charger Circuit using 1.5V Battery
This Simple Cell Phone Charger Circuit using 1.5V Battery is one special charger we can take anywhere but there is no need to plug; we can charge phone anytime. It also uses a standard AA or AAA battery like the one used in TV remotes, inside, it includes a circuit that boosts the weak battery […]
Simple LM317 Audio Amplifier Circuit
This Simple LM317 Audio Amplifier Circuit is a kind of like small trick to make speaker sound louder; also this LM317 chip usually is used to control voltage but here it works like small music booster amp. Therefore, it is not very strong amp but still helps give little more sound from the music source; […]