Learn transistor circuit works, old parts But, we often use it. Because of durable, high current. Whether any reason. Let's learn they works in simple way.
It is a basic component we always use them. What is a capacitor? Principle working, types and how it works. Read this article you will get the answer.
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.
Here is a DIY resistance decade tool for testing and calibration. Because it can substitute into a circuit with all standard value. This ideal is cheapest that use resistors and wires only.
Can we use AND and OR logic gate with Diodes? Yes, we can. The past, we have used only a digital logic circuit by IC. But, in truth. We do not need any ICs. Use Switches or Diodes or transistors connected as a logic circuit.
It's very easy to use resistors only. Let's practice a little electric calculator, fun! How can we extend the range of voltmeter?