Electronics - Theory and Practice

Proper Soldering Technique

Figure 1 above shows proper soldering technique. The diagram shows the tip of the soldering iron being inserted into the joint such that it touches both the lead being soldered and the surface of the PC board.

Then, solder is applied into the joint, not to the iron directly. This way, the solder is melted by the joint, and both metal surfaces of the joint (the lead and the PC pad) are heated to the necessary temperature to bond chemically with the solder. Read the rest of this entry »

Posted in Tutorials | No Comments »

Simple Inverter 12V DC to 110/220V AC, 20-40W

Here simple 20 Watt - 40 Watt inverter circuit diagram which able to convert 12V DC become 110V or 220V AC.

Tips :

First wire to oscillator part only.
Then check out put Pin 10 &11 of CD4047 to obtain the required wave forms ( two 120Hz ,180 degree out of phase,50% duty cycle waves.
Then connect transistors ,transformer and load (25 W bulb for test).See it working!.

Posted in Computer Data, Schematic Diagrams | No Comments »

Simple Doorbell Circuit with IC 555

This electronic schematic diagram is simple, you can use this schematic diagram as your simple electronic project. It’s easy and fun.

The main part of this doorbell circuit are two NE555 timer ICs. When  some one presses switch S1 momentarily ,the loud speaker sounds a bell tone as long as the time period of the monostable multivibrator built around IC1.

When the switch S1 pressed, IC1 is triggered at its pin 2 and output pin 3 goes high for a time period previously set by the values of POT R4 and POT R5.When the output ofIC1 goes high it resets IC2 and it starts to oscillate to make a bell sound through the speaker.The IC2 is configured as an astable multivibrator whose oscillation frequency can be varied with the help of POT R5.By adjusting the values of R4 & R5, modifications on the tone are possible.

Read the rest of this entry »

Posted in Schematic Diagrams, Simple Projects | No Comments »

Audio Power Amplifier 2-20 Watt Stereo

This schematic is very simple, there is just need 1 active component in each channel (I mean right channel and left channel). So, there are 2 active components for stereo a stereo audio power amplifier.

The schematic originally come from www.circuit-projects.com

Description:

Read the rest of this entry »

Posted in Schematic Diagrams | No Comments »

Simple 5 Ampere Power Supply

Power supply is a must used circuits. Most of electronic devices which require DC voltage usually need a power supply. Some of them just need original power supply or battery, but some of circuits like Radio transmitter or amplifier needs high current output power supply.

This project is a simple and easy made 5 ampere power supply. To build this circuit, just follow the instruction below:

Read the rest of this entry »

Posted in Schematic Diagrams, Simple Projects | No Comments »

LED Flip Flop Project

You’re a newbie in electronics and you need to practice your electronics knowledge and then I suggest you to build this LED Flasher (Flip-Flop). This circuit is very simple and very easy to understand…

INTRODUCTION:

Flashing circuits are very interesting. They grab your attention and can be used in many applications. They consume very little energy and a single cell can last as long as 12 months. This is the simplest circuit capable of alternately flashing two LEDs.

SCHEMATIC DIAGRAM:

COMPONENT LIST:

Read the rest of this entry »

Posted in Schematic Diagrams, Simple Projects | No Comments »

High Voltage Capacitors

Do you looking for high voltage capacitors for your circuit..?
I just get this table about capacitor working voltage for each type of capacitor (ceramic, electrolytic, tantalum, mylar polyester and mylar metal film capacitor).

Read the rest of this entry »

Posted in Components, Electronics Articles | No Comments »

Capacitor Winding Machine

I’m browsing to know more about capacitor… from capacitor’s color code, last kind of capacitors and other articles about capacitors. I found some interesting topic about capacitor winding machine.. yeah, capacitor winding machine is used to make capacitors…

Here are some of them, taken from Hilton International Industries, Inc:

Optima Capacitor Winding Machine

Dual winding arbors, electronic closed loop tension control and web speeds in excess of 3 meters per second make this the fastest and most accurate winding machine of it’s type in the world.

Foil edge and end folding, self threading and stripping arbors and unattended, automatic operation make it the most cost effective.

Read the rest of this entry »

Posted in Electronics Articles | No Comments »

Electrolytic Capacitor

Electrolytic capacitor or electrolytics condensator or we often call “ELCO” is a type of capacitor that uses an ionic conducting liquid as one of its plates. Typically with a larger capacitance per unit volume than other types, they are valuable in relatively high-current and low-frequency electrical circuits. This is especially the case in power-supply filters, where they store charge needed to moderate output voltage and current fluctuations, in rectifier output. They are also widely used as coupling capacitors in circuits where AC should be conducted but DC should not.

Electrolytic capacitors can have a very high capacitance, allowing filters made with them to have very low corner frequencies.

Electrolytic Capacitor Construction

Aluminum electrolytic capacitors are constructed from two conducting aluminum foils, one of which is coated with an insulating oxide layer, and a paper spacer soaked in electrolyte. The foil insulated by the oxide layer is the anode while the liquid electrolyte and the second foil act as cathode. This stack is then rolled up, fitted with pin connectors and placed in a cylindrical aluminium casing. The two most popular geometries are axial leads coming from the center of each circular face of the cylinder, or two radial leads or lugs on one of the circular faces. Both of these are shown in the picture.

Read the rest of this entry »

Posted in Components | No Comments »

Conductor Explanation

In electronics and engineering we often heard something called conductor… what is a conductor..? A conductor is a material which contains movable electric charges. In metallic conductors, such as copper or aluminium, the movable charged particles are electrons (See electrical conduction). Positive charges may also be mobile in the form of atoms in a lattice missing electrons (called “holes”) or ions, such as in the electrolyte of a battery.

All conductors contain electric charges which will move when an electric potential difference (measured in volts) is applied across separate points on the material. This flow of charge (measured in amperes) is what is meant by electric current. In most materials, the rate of current is proportional to the voltage (Ohm’s law,) provided the temperature remains constant and the material remains in the same shape and state. The ratio between the voltage and the current is called the resistance (measured in ohms) of the object between the points where the voltage was applied. The resistance across a standard mass (and shape) of a material at a given temperature is called the resistivity of the material. The inverse of resistance and resistivity is conductance and conductivity. Some good examples of conductors are metal.

Read the rest of this entry »

Posted in Basic Concept Of Electricity | No Comments »