Precision Full-wave | Half-wave rectifier circuit using OP-AMP
Learn types of rectifier circuit using op-amp. A diodes cannot rectifier ACV lower mV. But 741 rectifiers can help it, in filters, signal measurements, etc. Read more
Let’s learn how Cell Phone Charger circuit work
Modify cheap mobile phone charger inside is simple DC switching regulator circuit and can apply many ways, such as DC power supply Read more
Recycling free white SMD LED from e-waste
Today I will show you how to recycle a super bright white LED from a broken T8 LED tube. At the present, almost every household prefers to use LED light bulbs over other light bulbs. Because it uses about 50% less energy and is also cheaper. The LED tube size T8 can be used to … Read more
5-minutes Power Off Delay Timer Circuit
Want to have longer lighting with the original battery? Let’s learn the concept and design of the power off delay timer circuit in a simple way. You may apply it indefinitely. Read more
5 Simple emergency light circuit | Many ideas
This is first mini emergency light of my son. It is very small, use LED display when power outage,use transistor instead relay use AA battery charger. Read more