Stable 5V power needed for many electronics like sensors, microcontrollers and digital parts. LM7805 voltage regulator IC is used in 12V to 5V converter which is very useful. This circuit takes 230V AC and gives 5V DC and keeps device working good and stable. Main parts of the circuit are transformer, bridge rectifier, filter capacitors, […]
Power Supply Circuits
Simple Transistor-Based Voltage Booster Circuit
In many electronics low voltage is not enough but need only higher voltage. Voltage booster circuit helps, take low voltage and makes it higher. This project for Simple Transistor-Based Voltage Booster Circuit show how to make voltage booster using simple parts like: PNP transistor 2N2907, NPN transistor 2N2222, resistors, capacitor, diode, inductor. It takes 3V […]
DIY Variable Power Supply Circuit using Arduino
This DIY Variable Power Supply Circuit using Arduino makes changeable power. It uses transistor and resistors to change 9V output from IC 7809 regulator. One 100uF capacitor help clean the output voltage. Two pushbuttons can change the voltage by hand. LCD screen show real output voltage. Coding: Code Explanation: Circuit Working: Parts List: Component Quantity […]
Simple Battery Eliminator Circuits using 3 Methods
This article shows how to make Simple Battery Eliminator Circuits using 3 Methods with many useful features. When we need steady DC power for devices then battery eliminator is very useful. There is no need of normal batteries. These circuits change AC from transformer to DC power for electronics. It is very helpful for testing, […]
Simple Positive Voltage to Negative Voltage Converter Circuit
This article for Simple Positive Voltage to Negative Voltage Converter Circuits shows how to change positive DC voltage to negative DC voltage using special converter circuit. This circuit is useful for many electronic things. One famous and easy to use chip is IC 555 which is strong and works well. IC 555 are mostly used […]
Simple Current Limiting Circuit using IC LM317/LM338
Current going to load is controlled by Simple Current Limiting Circuit using ICs LM317/LM338. These chips also work as current limiters if set properly. Power comes in as Vin. LM317/LM338 have 3 pins: input, output and adjust. Vin goes to input pin. Output pin (Vout) goes to load and gives limited current. Circuit Working: Parts […]