Power Supply Circuits

Simple F/V converter is cool circuit. It changes signal with different frequency to DC voltage same as that frequency. It is used in many things like tachometer, speedometer and factory machines. LM331 is popular IC for this and it can do both V/F and F/V. It is very accurate and very flexible. Here LM331 works […]

Frequency to Voltage Converter Circuit using IC TC9400 is useful in signal work, motor speed control and sensor connect. It takes frequency signal and gives voltage output. This helps to read and use frequency as voltage in many ways. Circuit works with 10 to 15V DC power. Diagram shows TC9400 chip is used as FVC […]

Boost Converter Circuit which is the step-up voltage regulator take low voltage and make it high. It is very useful when power source gives less voltage than needed. LM2577 is famous IC which helps make step-up circuit easy. This article for Simple Boost Converter Circuit using IC LM2577 shows how the IC works, give formulas, […]

EL wire need special power. Normal battery DC cannot power it. EL wire is thin, bright and flexible and it is used in art, clothes, signs and lights. It needs high voltage AC from 100 to 200V with 1 to 5 kHz. So, need EL wire inverter circuit where it changes low voltage DC to […]

Modern electronics need good power control especially for high current and low voltage use. MIC29302WT is strong LDO regulator and it gives high current with small voltage drop. It is good for battery devices, car electronics and microcontroller power. It gives up to 3A current, so it can handle heavy circuits. Output voltage is from […]

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, […]