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 […]
Power Supply Circuits
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 […]
Boost Converter Circuit using IC 555
Boost Converter Circuit using IC 555 take low DC voltage and makes high DC voltage and is used for IC 555. IC 555 make PWM signal to control other parts. Other parts used are IRFZ44N, inductor, diode, resistor and capacitor. Circuit Working: Parts List: Component Type Description Quantity Resistors 1k ohm 1/4 watt 1 Potentiometer […]
12V SMPS Driver Circuit for LED Strip
12V SMPS driver change big AC power from 110V or 220V into small 12V DC. Circuit is good for LED strip light. In this DIY we make cheap and strong LED driver. It can power full 12V LED strip with 100 or 200 LEDs. Important points to follow: Circuit uses 230V AC direct which is […]