NE5532 Pinout Datasheet Dual low noise op-amp
NE5532 is in Hi-Fi audio system a lot. Why? Read this datasheet, Get pinout, spec, how to use. For example preamplifier with tone control. Read more
Voltmeter: Working Principle and How to Increase the Range
My son want to make a simple DC voltmeter on 0-10V range by Convert a galvanometer to voltmeter.Galvanometer DC1mA is cheap and easy with one resistor only. Read more
0-30V 0-5A regulated variable power supply circuit
Do Not Make This circuit If You are not brave enough. Read more
Speaker protection circuit
It will prevent the speaker from too over high power output may speaker damaged it use transistor and relay cut off as safe. Read more
15 Filter circuits using electronic coil
I love to collect a lot of circuits. A filter circuit is important in Electronics. I will show you many ideas of noise hum, high-low frequency, and more. Some will smile it so easily and without a power supply. These are small circuits, so easy to apply, and try into your works. There are seven … Read more