Soldering make bad smoke which is not good for health. So every work table need good smoke remover. To Build Our Own Solder Fume Extractor Circuit uses few easy parts to remove bad smoke. It uses BC547 transistor, small DC fan, preset resistor, capacitor and NTC thermistor to make air clean and safe. NTC thermistor […]
Simple Arduino Based Electromagnetic Field Detector Circuit
EMFs (electromagnetic fields) are invisible energy from electricity and lights which are natural and man made. Some EMFs are safe and some are bad if used too much for long time. We can use simple Arduino tool to find EMFs around us. Moving electric charge make EMFs. EMFs have two parts: electric field and magnetic […]
3 Ways to Build a 12V to 5V Converter Circuit using IC LM7805
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, […]
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 […]
Simple White LED Driver Circuit using TPS61161A
White LEDs are very common now for lights. They are used in electronics, car displays and home lights because they save power, last long and work well. But for long life and best work the power must be managed well. IC TPS61161A is special chip which is the LED driver for this job. It can […]
Exploring the L293D H-Bridge Motor Driver Circuit
L293D is small chip which control speed and direction of DC and stepper motors. People use it a lot in robots and automation. It uses H-bridge system to change motor direction by flipping voltage. Chip can run 2 motors at same time. Each motor get up to 600 mA current which is good for small […]