Electronic Components

Melyssa120504* wrote:what are the meaning of base emmiter and collector

The other type of BJT is the PNP, consisting of a layer of N-doped semiconductor between two layers of P-doped material. A small current leaving the base is amplified in the collector output. That is, a PNP transistor is "on" when its base is pulled low relative to the emitter.

Melyssa120504* wrote:How to test the transistor using VOM?

Transistor Pinouts. Fortunately, using a DMM to get a basic pass/fail reading from a suspected faulty NPN or PNP bipoloar transistor is a simple and quick task. ...
Step 1: (Base to Emitter) ...
Step 2: (Base to Collector) ...
Step 3: (Emitter to Base) ...
Step 4: (Collector to Base) ...
Step 5: (Collector to Emitter)

jine wrote:What are the types of switches?

The types of switches are classified into four types namely:
SPST (Single Pole Single throw)
SPDT (single pole double throw)
DPST (double pole, single throw)
DPDT (double pole double throw)

how do you check if the capacitor is bad with a multimeter?

jmmasagca wrote:how do you check if the capacitor is bad with a multimeter?

To test the capacitor with a multimeter, set the meter to read in the high ohms range, somewhere above 10k and 1m ohms. Touch the meter leads to the corresponding leads on the capacitor, red to positive and black to negative. The meter should start at zero and then moving slowly toward infinity.

how will you identify the emitter base and collector of a transistor?

jmmasagca wrote:how will you identify the emitter base and collector of a transistor?

To identify the pins, keep the front flat side facing you and count the pins as one, two etc. In most NPN transistors it will be 1 (Collector), 2 (Base) and 3 ( Emitter ). Thus CBE. But in PNP transistors, the condition will be just reversed.

What are the difference between variable resistor and light-dependent resistor?

Who invented the relay and how he/she named it as "Relay"?

Where the relay are commonly used?

Is there any relation between switches and transistors?

What are the different types of swithes are commonly used and their appropriate function?

Who discovered "Light-dependent resistor"?

In what components/appliances commonly used the light-dependent resistor?

The light-emitting diode and the light-dependent resistor has a similarities?

What are the different function/process of "Diode" and "Light-emitting diode" in terms of blocking and flowing electricity in one way?

Each pin of Integrated Circuit (IC) has value/different value?

The potential energy in a capacitor is stored in an electric field, where a battery stores its potential energy in a chemical form. The technology for chemical storage currently yields greater energy densities (capable of storing more energy per weight) than capacitors

Adrian wrote:What are the difference between variable resistor and light-dependent resistor?

Variable resistors are altered continually as they work: eg for volume control in a radio. Light-dependent resistors (LDRs) change resistance as light levels change. The light levels are detected by a photo-sensitive plate on the resistor.

Adrian wrote:Each pin of Integrated Circuit (IC) has value/different value?

Yes ,It is even corresponds to different functions.

Adrian wrote:What are the different function/process of "Diode" and "Light-emitting diode" in terms of blocking and flowing electricity in one way?

The key function of an ideal diode is to control the direction of current-flow. Current passing through a diode can only go in one direction, called the forward direction. while LED is just simply emit light when current pass through.

Adrian wrote:The light-emitting diode and the light-dependent resistor has a similarities?

Basically they just both have the use of light to function but technically it has a different use or purpose.

Adrian wrote:Who discovered "Light-dependent resistor"?

LDR or Photoresistors have been seen in early forms since the nineteenth century when photoconductivity in selenium was discovered by Smith in 1873.

Adrian wrote:What are the different types of switches are commonly used and their appropriate function?

This has been answer already adrian. just kindly read all the threads for the additional knowledge

Adrian wrote:Where the relay are commonly used?

Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal.