Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
INTRODUCTION: A printed circuit board (PCB) IS a sheet of insulating material usually Bakelite with metallic circuitry photo chemically formed upon that material or substrate. On this sheet small holes are given for accommodating the diverse components of the circuit to be assembled. Interconnections between components are achieved by means of conducting paths (metallic conductor pattern) running path or through the substrate is called tracks. Tracks meet components to which they are to be linked through a larger conductor area known as land or pad. The electrical connection between a land and component‘s terminal is achieved by means of a solder joint. Every circuit has its own PCB but the process of manufacturing is more or less the same. First of all the Bakelite sheet of the proper size is taken. The whole sheet is covered with a copper strip on it; the circuit lines are drawn and covered with an enamel layer. After the paint is dried up into solution of ferrite chloride with few drops of hydrochloric acid (HCl). The copper (except the painted portion) is dissolved in the solution later on; this paint is cleaned off by petrol or kerosene. On this copper strip, holes are provided to accommodate the components. To protect from dampness, the copper strips are covered with a layer of varnish.
ADVANTAGES OF PCB: The copper strips over the PCB serve the purpose of the wires hence much wire is saved. Circuit charactistics can be maintained without introducing variation in inter-circuit capacitance. Mass production can be attained at lower cost. Inspection time is decreased as probability of error is removed. As the components are tightly fixed and therefore risk of short circuiting is minimised.
Define free vector
Absorbance spectrophotometer: A schematic diagram of a simple instrument that is used to measure the absorption of visible light is shown in Figure below. When studyin
what is motion
the difference and examples of kinematic in one dimension from two dimension?
Determine the Shear Force in kN rounded to 1 DP and Bending Moment in kN.m rounded to 1 DP at point C in the beam when the UDL for AC on the beam is P52 kN/m and the maximum value
A spring is held vertically downward and a current is passed through it . Then the length of the spring : A . increases B. decreases C . does not change D the spring osc
Explain magnetic bearing The horizontal angle among the line and magnetic meridian passing through one of the extremities of the line is known as magnetic bearing.
2. Surface Crystallography and Epitaxy Fe thin films are grown on a single-crystal Al (100) substrate surface. The films grow with no dislocations (if they are thin enough) which
Example like or unlike parallel forces
How to find out neutral point ? What all things we require to equate or form a equation to find the neutral poind and how to do it?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd