Resistors and How they Work
2017-06-16
Resistors start from Wires to Wirewound Types. Carbon Film Resistors are most Common, Metal Film Resistors are more stable and accurate. We have now SMD types with lower power someRead More
Design of a Constant Current Source
2016-02-09
This article will explain the way a simple transistor based current source is designed, this will give an idea on how some components can be used in a practical wayRead More
Electric double layer capacitor an eFlywheel
2009-08-04
The Electric double layer capacitor has the main use of a Charge Reservoir. That means a large amount of electrical charge in a small footprint. These charge/discharge quickly unlike theRead More
Design Notes – Components Selection – 05
2009-01-15
Selecting the parts for your product design, choosing the components intelligently is a part of Product Design Engineering. Budget, Availability, Size, Alternate Vendors, Product Life and Quantity to be manufacturedRead More
Circuits using only discrete devices
2008-10-18
Here are circuits made of Resistors, Capacitors and Inductors which are passive components. Crystals, Thermistors, Varistors, Variable Passive RLC are also Passive Parts. Circuits using only discrete devices Zeners, Diodes,Read More
Principles of Semiconductor Devices
2008-09-10
Principles of Semiconductor Devices The purpose of this text is to explore the internal behavior of semiconductor devices, so that we can understand the relation between the device geometry andRead More
Types of Capacitors
2008-09-06
Capacitors are as simple as two plates of metal separated by a insulator called dielectric. When you make large values of capacitors, just two films or plates will not do,Read More
BD139 and BD140 Complementary transistor
2008-08-27
This pair is my favorite when driving small solenoids or motors. SOT-32 and 12 Watts on Heatsink. This means any small solenoid, relay or DC motor can be controlled withRead More