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 […]
Power Supply Circuits
Simple Non-Contact 220V AC Detector Circuit using IC 555
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 […]
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 […]
Buck Converter Circuit for 1 Watt LED Driver
Imagine we have a strong water hose of 12V, but plant need soft sprinkle with 3.3V to 3.5V. Buck Converter Circuit for 1 Watt LED Driver is like adapter for hose. It makes pressure low and is good for plant. It also control water flow like current, so plant do not get too much of […]