LEDs on 120v
Here is a very clever CONSTANT-CURRENT voltage-doubling design. It produces up to 300v on a 120v supply and the current is 30mA. (see be...
SINGLE LED on 240v
A single LED can be illuminated by using a 100n or 220n capacitor with a rating of 400v. These capacitors are called "X2" and ar...
LEDs on 240v
I do not like any circuit connected directly to 240v mains. However Christmas tress lights (globes) have been connected directly to the mai...
Multistage Transistor Amplifiers
The output from a single stage amplifier is usually insufficient to drive an output device. Inther words, the gain of a single amplifi...
Sinusoidal Oscillators
Many electronic devices require a source of en-ergy at a specific frequency which may range from a few Hz to several MHz. This is achiev...
Regulated D.C. Power Supply - EBOOK DOWNLOAD
In general, electronic circuits using tubes or transistors require a source of d.c. power. For ex-ample, in tube amplifiers, d.c. voltage ...
Transistor Audio Power Amplifiers - EBOOK DOWNLOAD
A practical amplifier always consists of a num-ber of stages that amplify a weak signal until sufficient power is available to operat...
Transistor Biasing
The basic function of transistor is to do amplifica-tion. The weak signal is given to the base of the transistor and amplified output is...
Solid-State Switching Circuits
In practice, it is often required to make or break an electrical circuit in many operations. In some appli-cations, it is desirable and ...
Transistors - EBOOK DOWNLOAD
When a third doped element is added to a crystal diode in such a way that two pn junctions are formed, the resulting device is known as a...
Electronic Instruments - EBOOK DOWNLOAD
In recent years, the rapid strides and remarkable advances in the field of electronics is partly due to modern electronic instruments. By...