But before we start looking at the in’s and out’s of pulse width modulation we need to understand a little more about how a DC motor works. Next to stepper motors, the Permanent Magnet DC Motor (PMDC) is the most commonly used type of small direct current motor available producing…
The standard computer power supply unit (PSU) turns the incoming 110V or 220VAC (alternating current) into various DC (direct current) output voltages suitable for powering the computer’s internal components and with a little bit of imagination it is possible to convert ATX PSU to a bench power supply. Most computer…
So what are Passive Devices. Passive devices or components do not generate energy, but can store it or dissipate it. Passive devices are the main components used in electronics such as resistors, inductors, capacitors and transformers which together are required to build any electrical or electronic circuit. As their name suggests, Passive…
Digital logic gates can be used for connection to external circuits or devices but care must be taken to ensure that their inputs or outputs function correctly and provide the expected switching condition. Modern digital logic gates, IC’s and micro-controllers contain many inputs, called “pins” as well as one or…
Individual logic gates can be connected together to form a variety of different switching functions and combinational logic circuits. As we have seen throught this Digital Logic tutorial section, the three most basic logic gates are the: AND, OR and NOT gates, and given this set of logic gates it is possible to implement all of the…
We have also seen that each gate has an opposite or complementary form of itself in the form of the NAND Gate, the NOR Gate and the Buffer respectively, and that any of these individual gates can be connected together to form more complex Combinational Logic circuits. We have also seen, that…