Capacitor charging process
Capacitor charging process shows the variation of voltage and current in the capacitor over time, when it is connected to a DC voltage source
Feb 122020
Feb 112020
Logic probe circuit with CD4001 IC
This logic probe circuit is useful for people who needs an instrument to measure the logic levels on digital circuits. This circuit is implemented with CMOS IC technology and is recommended for testing circuits using the same technology
Feb 102020
Transistor – Zener diode Voltage regulator circuit
This circuit delivers an output voltage established by the voltage of the zener diode less 0.7 volts. The 0.7 volts is the average voltage drop between the base and the emitter of a transistor. (Vbe)
Feb 072020
Parallel RC circuit
Voltage, Currents, Phasor diagram & Impedance. Voltage is the same on the capacitor and resistor. Current is ahead of the voltage in the capacitor
Feb 072020
What is a Truth Table?
The Truth Table is used to simplify boolean equations obtained from digital circuits. The truth tables can have many columns, but all tables operate in the same way.
Feb 062020
Missing pulse detector circuit or No pulse detector circuit.
This circuit is very interesting because it can detect or warn of the absence or delay of an expected pulse, which under normal conditions should be received at predefined intervals.
Feb 062020
This light sensitive alarm is very simple and works using, as main components, a transistor, an LDR and a relay.
The alarm activates when the illumination level changes from almost total darkness to a moderately high illumination level. When this happens the alarm is locked and the alarm signal, be it a light or a sound, remains active.
Feb 032020
Non-inverting Operational Amplifier (opamp).
How to find the voltage gain (formula). How to find the Input impedance (Zi) and output impedance (Zo) of a non-inverting operational amplifier.
Jan 202020
12V Power Supply using Zener and 741 Op. Amp.
This 12V Power Supply has, as its main characteristic, a low output impedance. This is a very desirable feature in voltage sources and is achieved with a large open loop gain that the operational amplifier has.
Jan 172020
Bike Flashing LED Lights Circuit
Bike Flashing LED Lights Circuit. If you’re a cycling fan and you like biking, night and day, this useful circuit will make you to be visible and safe
Jan 172020
Basic structure of the sinusoidal oscillator
The sinusoidal oscillator basic structure consists of an amplifier (A) and a selective frequency network (ß) connected in a positive feedback loop
Jan 162020
Main Power failure alarm and battery backup Circuit
This Main Power failure alarm circuit tells us when the electricity that powers a system or circuit, is gone.