Playing with electric wire is risky especially if we do not know electronics. Wrong use of electricity can be dangerous. So better to be safe before touching wire and first check if some electricity with leakage voltage is still there. This article for Simple Non-Contact 220V AC Detector Circuit using IC 555 show how to […]
Power Supply Circuits
3V to 9V Dual Power Supply Circuit
IC 555 is used in easy circuit. Make both plus and minus voltage from one 3V source like two AA battery. It is useful for 3V to 9V Dual Power Supply Circuit. 555 work as astable multivibrator in circuit. It make square wave again and again on output pin 3. Outside resistors and capacitors control […]
Simple Voltage Follower Circuit using Op-amp IC 741
Simple Voltage Follower Circuit using Op-amp IC 741 give output same like input. It is also called buffer amplifier or unity gain amplifier. IC 741 op-amp is cheap and useful that is why so many people use it. Voltage follower has high input impedance and with low output impedance. It can give current to many […]
How to Build a Mini Tesla Coil Circuit
In this post for How to Build a Mini Tesla Coil Circuit these tesla coil make high voltage and low current. Mini Tesla coil is small version of big one. It can light small things or make tiny sparks. It runs on 9V battery or other low power. Circuit Working: Parts List: Category Item Quantity […]
Simple Buck Converter Circuit for Converting 12V to 3V
Simple Buck Converter Circuit for Converting 12V to 3V also called step-down converter is common in electronics. It takes high DC voltage and makes it lower, like a valve but for voltage. This type of circuits are used in phones and laptops to change 12V battery to lower voltage like 3V for small parts. Circuit […]
How to Convert 5V to 3.3V Circuit
Have anyone tried using a toy which needs 3.3V but charger gives only 5V? That too much power! This article for How to Convert 5V to 3.3V Circuit is like small helper. It take strong 5V and make it weak 3.3V which is right for device. This help when USB or charger give more power […]