Posts by Syed Saad Hasan

Surface mount technology is a domain of electronic PCB assembly in which SMD components are mounted on the surface of the PCB and then solde…

PCB Solder mask or PCB solder stop mask or solder resist is a thin lacquer-ish layer of polymer; it is applied to the copper traces of a PCB…

PCB Inspection/Testing techniques are an important part of PCB manufacturing before production. These evaluative tests are essential in dete…

The directional control of a DC motor is the intentional change of certain DC motor drive factors that govern the rotational direction of th…

A clap switch circuit is a simple electronic circuit that is used to gain dynamic control of AC/DC appliances by using the application of so…

An insect repellent or a mosquito repellent is a simple electronic circuit that repels small insects such as mosquitoes & flies on the princ…

The 74LS191 is a synchronous, reversible up/down counter having an inherent complexity of 58 equivalent gates. The 74LS191 is a 4-bit binary…

The 74LS190 is a part of the 74XXYY IC series. The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter, having an inherent compl…

What is a PWM DC Motor Controller? Directional & speed control (RPM) for AC/DC Motors can be achieved through various methods. It is essenti…

Venturing within the realm of electronics, most hobbyists stumble upon the most intriguing & intricate way of designing electronic circuits…

A DRC (Design Rule Checking) ensures that the submitted design complies with its published standard. Ensuring that the PCB will be fabricate…

The term array is used interchangeably in the PCB design industry. Essentially, it means a block containing a grid of similar elements. PCB…

The 74F657 is an octal transceiver featuring non–inverting buffers with 3–state outputs and an 8–bit parity generator/checker, and is intend…