How will it work and why is it needed? In this tutorial we will find answers to these questions and we will also build and test a simple Constant current source circuit using transistor. The circuit ...

In this project let’s build a simple fun circuit ... we need some kind of amplifier which could also be made using a transistor. Enough clues! try something on your own and then look into the circuit ...

In this project, we are going to make a simple metal detector circuit using a proximity sensor ... So, when the output pin of the proximity sensor is high, a positive voltage will be provided to the ...

Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – ...

This simple door opening alarm using hall sensor produces sound when someone opens the door. The circuit can be installed at a workshop ... It is built around hall sensor MH183 (IC1), pnp transistor ...

Here is a simple circuit of TV ... old Black And White TV sets. The circuit uses only one NPN transistor T1, BF494 and a few other components. A + 6V power supply for this circuit could be taken from ...

Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that ... circuit shown in Figure B fixes these problems by using an extra ...

This simple circuit has helped me out on many occasions. It is able to check transistors, in the circuit, down to 40 ohms across the collector-base or base-emitter junctions. It can also check the ...

This simple circuit ... the radio signal. Using this FS meter, one can quickly determine whether the problem lies on the transmitter or the receiver module. A single transistor T1 is the only active ...

A very simple but highly efficient combination lock circuit is shown in the figure ... to be "ON" (binary state "1") to forward-bias the transistor, energize the relay (used in normally open ...

Refer to the circuit using an LED. Tag alert ... value in the other version so that the oscillation frequency is audible. Gerbig’s article, “Simple Transistor Tester,” was published in Elektor ...