12v LAMP Dimmer Parts IC 1 – NE555 Transistor – 2N2955 -1 Resistance – 1k(2 no.), 100 Ω Variable Resistance – 50k Capacitor – 0.1 µF Diode – 1N4001 – 3 12v 2 amp Bulb Input Voltage is 12v. To create your own bench top power supply use the circuit shown in http://digitalab.org/2012/06/regulated-dc-power-supply-circuit/
Today LED has become an integral part of consumer electronics. LED TV, LED Display, LED Lights and so on. These are becoming very popular because of there low power consumption. What is LED? LED stands for Light emitting diode. A light emitting diode is essentially a PN junction semiconductor diode that emits a monochromatic(single) colour […]
Below is the regulated DC power supply( 12, 8, 5 v) circuit. This circuit can be customized by adding 9v and 6v voltage regulator. Also, the 4 diodes can be replaced by bridge rectifier. If you are looking for a variable power supply then click here
Simplest DC power supply circuit using 78XX is shown below. Parts D1, D2, D3, D4 – 1N4007 IC1 – 7812 IC2 – 7805 C1 – 1000 mf C2 – 330 mf C3 – 10 mf T1 – 12 v Step down transformer, 1 A.
To understand power supply circuits, we need to understand rectifiers. A rectifier converts AC or alternating current to DC direct current. Rectifiers are used in Power supply circuits which we will discuss in detail. The process of converting AC to DC is called Rectification. Half wave rectification. It requires only single diode. Only positive cycle […]
Passive Components RESISTORS To oppose the flow of electrons ( current). The symbols are shown below. Resistance is measured in units called “Ohm”. 1000 ohms is shown as 1k ohm (103 ohm) and 1000 k ohm is shown as M.ohms (106ohm). Resistors can be broadly of two types. • Fixed Resistors and Variable Resistors. Fixed […]
Introduction Electronic component can be divided into 2 types: Active and Passive components Resistors and Capacitors etc. are known as passive components because they can only attenuate the electrical voltage and signals and cannot amplify. Devices like transistors and operational amplifier(op Amps)can amplify or increase the amplitude and energy associated with the signals and so are […]