| If a PIC is used for example in a timer application, such as a programmable clock timer, the majority of the circuit is taken up by the us...
More about Circuit (708)
| The service provided by the circuit described in this article is known as a shuttle service (as for instance through the Channel tunne...
| This twopart article describes an AM/FM/SSB receiver for the frequency range 0.15 – 32 MHz, which is generally (but incorrectly) re...
| An RF decibel (or power) meter is an indispensable instrument in any radio workshop. Unfortunately, accurate, wideband models are fairly e...
| The voltage step-up converter described in this article is a transformerless design based on just one integrated circuit and a handful of...
| In many instances, suspect television receivers and monitors can be tested with a simple test pattern generator as described in this a...
| To make a certain musical instrument in a group stand out, a so-called presence filter is normally used. Unfortunately, the types usuall...
| There are systems in which it is imperative that the supply voltage of, say, a motor, always has the correct polarity.
| The NE612 is an active mixer/ oscillator that is used in numerous r.f. circuits. Three unusual applications of this versatile building b...
| The input impedance of a.c.-coupled op amp circuits depends almost entirely on the resistance that sets the d.c. operating point. If CMO...