Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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The logic NOT Gate – Symbol, Truth Table
The NOT gate is a logic gate that has only one input and one output. The output logic level is the opposite of the input logic level
Measure Resistance with an Analog Multimeter
How to use the analog multimeter / VOM to measure resistance (ohms). How to use the range selector and how to set the needle to zero ohms.
How to Make a Current Flow Indicator?
This Electric Current Flow Indicator gives a visual indication that there is a current flow. Possible applications for this small circuit may be: a battery charger, a voltage power source, etc.
In order to achieve our objective we place 3 rectifier diodes in series, which in turn are in series with the load / battery.
8 LED VU meter circuit using LM324 IC
This circuit can be used to display the variation of an audio signal in a group of 8 LEDs, behaving like a VU meter. We could use any specific integrated circuit used for VU meters, but we decided to use a readily available LM324 op amp. I.C.
Op Amp Tester Circuit Diagram
Very simple circuit to test 741 op amp or another IC with the same pin configuration. Circuit working explanation
How to make a Light Sensitive Sound Generator Circuit?
Light Sensitive Sound Generator Circuit – An oscillator circuit may have many applications. The diagram shows how to make it work as a light sensitive sound generator using a LDR and a 741 operational amplifier.
Light activated switch circuit with LDR and Op Amp
This circuit has many applications. It could act as a photocell and switch off a light in a room or turn on the radio when it is dawning, etc.
Resistors in Parallel – The equivalent resistance
Resistors in series and parallel. How to calculate resistors in series and resistors in parallel. How to calculate resistors in parallel using conductance. Formulas
BCD code: binary-coded decimal.
In order to share information in digital format, it is common to use a binary or hexadecimal representations (BCD Code). There are other methods to represent this information and one of them is the BCD code.
Burglar alarm using thyristor and relay
Burglar alarm using thyristor and relay
This is a simple Burglar alarm uses a thyristor as the main element and a relay as the output device. The relay can activate a buzzer or a siren.
Light Push button Circuit with time delay
This Time Delay Light switch circuit is useful to illuminate locations where a low power light source is needed. A closet, a car trunk, are good examples.
Binary Number System
The Binary Number System, unlike the Decimal Number System, where 10 figures are allowed (from 0 to 9), only needs 2 figures: “0” and “1”.