Measuring a resistor on board will give you a perfect conviction that your resistor is good or bad. Plug the electrical gadget to an external power source, and place your black probe on earth or at any leg of the filter capacitor. Touch each leg of the resistor with the positive probe while your multimeter […]
Resistor Resistor is one of the electronic that is non polar and known for ability in resisting current adjusting signals, voltage divide and transmission line terminated. It is known for its resistance values. Measuring the resistance value of a resistor is very simple if you know all the resistor color codes Resistor Color Codes Knowing […]
Fuse simply means circuit breaker. It is one of the electronic components that is used to prevent high current from having bad effect on other electronic components. It is made up of a metal wire or strip (which melts or breaks easily when there is excessive heat) which is covered with a glass. Testing a […]
Inductor is a device that is made up of winding core (some might not have core within them). It is measured in Henry (H, µH, mH). Another name for inductor is coil. Inductor failure is always as a result of open turns and change in value of inductor. Open turns is as a result of […]
Multimeter is an equipment that can be used to measure all electronics (fuse, capacitor, transistor, diode etc.) and their behaviours in the circuit. Multimeter can also be used to measure voltage, resistance, current and continuity. This article will teach you how to use both digital and analogue Multimeter. Digital Multimeter: As in the diagram above, […]
For you to be able to identify a bad and a good transistor, you must understand that transistor are two back to back diodes. Transistor is made up of 2 diode with one shared leg. The shared leg is known as the base. We have 2 types of Transistor. 1. NPN Transistor: This transistor uses […]
In this study, we are going to learn how to test a linear transformer specifically a step down linear transformer. Let us look at two available methods of testing a transformer. METHOD 1: Test the input voltage to confirm if it is the expected voltage from the power source (230V depending on the country). You […]
Diode is an electronic component and it allows current in one direction. If it reads current in the opposite direction, it means that the diode is bad. The diode has two (2) legs and the shaded part of a diode is known as the negative (Cathode) and the other leg is known as the positive. […]
By carefully observing a capacitor, you can know if it is bad or not. The cap of a bad capacitor will be bulged or swollen or loosed but the cap of a good capacitor will be very flat and tight and closely neated. But testing a capacitor with an ammeter or multimeter gives more precision. […]
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