Table of Contents
What is a electrical schematic?
The schematic is a drawing that defines the logical connections between components on a circuit board whether it is a rigid PCB or a flex board. It basically shows you how the components are electrically connected.
How do you know if a transistor is NPN or PNP?
Connect the positive lead of the multimeter to the Base (B) of the transistor and connect the negative lead to the Emitter (E) of the transistor. If it is an NPN transistor then meter should show a voltage drop between 0.45V and 0.9V. If it is a PNP transistor, then it should display see “OL” (Over Limit).
How do I know which transistor to use?
When choosing a transistor to use as a switch you need to consider its maximum collector current Ic(max) and its minimum current gain hFE(min). Transistor voltage ratings may be ignored for supply voltages less than 15V.
What is BC547 transistor?
BC547 is a Bipolar Junction Transistor, abbreviated as BJT. It is an NPN transistor. It has three terminals named as: Emitter. Collector.
What does a schematic show?
What is a schematic diagram? The word “schematic” means a plan, outline, or model. So a schematic diagram is a graphical representation of a plan or a model that is presented in a simple, accessible way. Schematics use simple lines and symbols to communicate information such as what, how, and where.
What is electrical load schedule?
An Electrical Load List (Schedule) is an estimated electric power consumption list that is sub-summarised by a circuit, sub-facility (sub-station), and whole plant (main-substation). The Electrical Load List (Schedule) is a key deliverable document of the Electrical Engineering discipline.
How do you read commercial construction blueprints?
4 Tips for Reading Blueprints Begin with the title block. The title block is the first piece of information you’ll see in construction site plans. Study the plan legend. Find the blueprint’s scale and orientation. Look for notes from the architect.
What are the 7 parts of electrical plan?
2.1 Plan Requirements. (A) Location and Site Plans. (B) Legend or Symbols. Refer to Appendix A – Electrical Symbols. (C) General Notes and/or Specifications. (D) Electrical Layout. E) Schedule of Loads. Schedule of load in tabulated form shall indicate:.
How do you read a transistor with a multimeter?
Hook the positive lead from the multimeter to the to the BASE (B) of the transistor. Hook the negative meter lead to the EMITTER (E) of the transistor. For an good NPN transistor, the meter should show a voltage drop between 0.45V and 0.9V. If you are testing PNP transistor, you should see “OL” (Over Limit).
Which pin is which on a transistor?
The pin configuration is the same as that of a Bipolar Junction Transistor. Usually, the device is held such that the flat side is facing toward the person. The pins are numbered from 1 to 3 starting from left to right. Pin 1 is the anode, Pin 2 is the Gate and Pin 3 is the cathode.
Why is transistor used?
Transistors are a three terminal semiconductor device used to regulate current, or to amplify an input signal into a greater output signal. Transistors are also used to switch electronic signals. Nearly every electronic device contains at least one or more types of transistors.
How does current flow in a transistor?
We know that in transistors and diodes, electric current is carried by both free electrons and holes. Free electrons and holes travel in opposite directions. For example, if free electrons flow from left to right then the holes will flow from right to left.
What does a PNP transistor do?
PNP transistors are used to source current, i.e. current flows out of the collector. PNP transistors are used as switches. These are used in the amplifying circuits. PNP transistors are used when we need to turnoff something by push a button.
Is BC547 a PNP?
BC547, BC557 series devices are silicon NPN – PNP small signal transistors, manufactured by the epitaxial planar process, designed for general purpose amplifier ,switching and AF amplifier applications.
How do I use BC547?
BC547 Transistor Application BC547 is usually used for current amplifier, quick switching and pulse-width modulation (PWM). Therefore, if you need to control the speed of a motor or actuator in some of your projects, you can simply use this transistor to achieve it.
Can I use BC547 instead of 2N3904?
Yes, you can use, for switching just look for Ic(collector current) and Vceo(collector-emitter voltage) in the datasheet.
What is the use of schematic diagram in electronics?
Schematic Diagrams in Electronics Also called wiring diagrams or circuit diagrams, these diagrams show how the different components of a circuit are connected.
How do you read electrical drawings UK?
The electrical schematics are read from left to right or from top to bottom. This is important to get right, as the signal direction indicates the flow of current in the circuit. It is then easy for a user to understand when there is a change in the course of the circuit.
What is an example of an electrical load?
In a household setting, the most obvious examples of electrical loads include light bulbs and appliances. In a more general sense, any resistor or electric motor in a circuit that converts electrical energy into light, heat, or useful motion constitutes a load on the circuit.
What type of load is a heater?
Resistive Load Two common examples of resistive loads are incandescent lamps and electric heaters. Resistive loads consume electrical power in such a manner that the current wave remains in phase with the voltage wave. That means, power factor for a resistive load is unity.
Is it hard to read blueprints?
Blueprint reading is not terribly difficult but it does require practice and some basic knowledge of blueprints. This online blueprint reading course is designed to provide you with that foundation knowledge and enough practice at reading blueprints to get you started.
