Counter-electromotive force or Back-electromotive force
The voltage of a DC motor is divided into a voltage in the windings resistance and a voltage called Counter-electromotive force
Oct 192018
Oct 172018
DC Motor
A DC motor is composed of a stator and a rotor. In many small motors, the stator is composed of magnets. Larger motors have windings.
Oct 162018
Static Electricity – What it is?
Static electricity is static, since it is a current that is going nowhere. Both, DC and AC current flow in some direction, but estatic electricity does not.
Oct 152018
The Magnetic Field. Magnetic Field Lines
Magnets. Charges in motion (electric current) behave like magnets (produce magnetic fields)
Oct 112018
XOR logic gate
In digital electronics there are special gates. One of them is the XOR logic gate or exclusive OR gate. Equivalent XOR Logic Gate using common logic gates
Oct 102018
Sequential Circuits Using Logic Gates
The main difference between combinational circuits and sequential circuits is that in sequential circuits there is one or more output signals fed back to one or more inputs to obtain a new output.
Oct 102018
Combinational Circuit Using Logic Gates
A combinational circuit is a circuit where the output depends only on the combination of the inputs at the time we are testing the output
Oct 092018
Surge Protection Circuit (Voltage Delay Circuit)
This Surge protection circuit is placed between the DC voltage source and the circuit that you want to power. This circuit delays the voltage given by the power source and allows the voltage to be applied to the circuit or device a few moments later.
Oct 082018
Variable Dummy Load for Power Supply Testing.
How to test a voltage source to know if it is good or not?. What is the percentage regulation?.
Oct 052018
AC motor (AC Electric Motor)
One of the characteristics of an AC motor is the number of rotor poles. This data will automatically give the number of windings that the motor has: # windings = # poles x 2.
Oct 052018
Internal resistance of a voltage source
Voltage sources, whether batteries, generators, etc., are not ideal (perfect). A real voltage source is composed of an ideal voltage source in series with a resistance called internal resistance.
Oct 042018
4-channel audio mixer using LM3900 IC
4 operational amplifiers, some resistors and capacitors to implement an audio mixer with a very simple design.