> Electronics
What is a capacitor A capacitor is an passive device that stores electrical energy in an electrical field. In layman terms it is a reservoir for energy the same way a rechargeable battery is, although it has many other properties…
What is an electret microphone One of the most common microphone component that is used in the today's devices (eg. smartphone) is the electret microphone. The electret capsule contains, among other little details, an electret diaphragm and a JFET transistor…
Background I have few old power transformers laying around and right now I need one for a project I am working at. The only problem is that they were not labeled properly (or at all) by the manufacturer so I…
Background While building a portable FM receiver I have just noticed that there are no Eagle library for the Arduino Pro Mini devices. Or at least I wasn't able to find one when I searched for. Since creating a new…
How to build a power supply for DDS Function Signal Generator module After building a DDS function signal generator I found out that, in order to power it on, it requires three different input DC voltages: 12V, -12V and 5V.…
One of the most popular Integrated Circuit (IC) is the so called 555 Timer IC which was introduced in 1972 by a company called Signetics (aquired 4 years later by Philips). The 555 timer IC is an integrated circuit (chip)…
One important category in electronics is the Semiconductors. In the following we are going to talk about semiconductors, more exactly about four of them which you would most likely find in any electrical device nowadays: Diode BJT (the Bipolar Junction…
Few years ago I modified a salvaged ATX power supply to a fixed voltage bench power supply. It was very useful, I still use it, however it comes a time when you need other voltages than some fixed voltages (eg.…
While learning about diodes I came across of a very interesting type of diodes, the Zener diode. Here is what I've learned about it. What is a Zener diode Normally a diode is made to conduct current in its forward…
One important part of electronics is converting the alternate current (AC) - the form of current delivered to our homes and offices - into a useful direct current (DC). Although I am just a newbie in this field, rather a…