Did anybody’s device ever had no battery but have other batteries with just wrong size? then this post will show how to make a Dual Battery Charging Circuit. Also, it uses one power to charge two batteries and it uses one small chip called IC 555 and other small things to ensure both battery get […]
Power Supply Circuits
Adjustable Voltage, Current Power Supply Circuit using Transistor 2N3055
This Adjustable Voltage, Current Power Supply Circuit using Transistor 2N3055 talks about how to make simple and useful power circuit, as this circuit can change voltage and current so it can work for many electronic projects. Also, the circuit uses one popular transistor called 2N3055 and some other parts. WARNING: Be careful, High voltage can […]
220V Over Under Voltage Cut Off Circuit using Transistors
This 220V Over Under Voltage Cut Off Circuit using Transistors help to protect electric things from too high or too low voltage, it also uses two transistors and some easy parts. First, when voltage goes too much high or too much low then circuit cuts the power, also it is good for home use and […]
9V to 300V Converter Circuit
This smart design for 9V to 300V Converter Circuit changes a small 9V battery power into big 300V power; also it uses only one transistor which is very simple and easy for one to try. Also, this circuit is good for learning and for small projects. What is a 9V to 300V Converter: A circuit […]
Simple Hum Free Regulator Power Supply Circuit
This Simple Hum Free Regulator Power Supply Circuit uses one common transistor 2N3055 to make power supply clean and stable; also it stops unwanted noise like hum sound which sometimes come from power supply. What is a Hum Free Regulator Power Supply: A Hum Free Regulator Power Supply circuit reduces or removes hum noise that […]
Simple Adjustable Power Supply Circuit using Two Transistors
This Simple Adjustable Power Supply Circuit using Two Transistors is a simple power supply circuit, which can change the output voltage by using two transistors like BD140 and MJ2955 to control the voltage. What is a Adjustable Power Supply Circuit: Adjustable power supply circuit is an electric circuit which uses two transistors to change and […]