More about DC (398)

1-12-2004 | Some circuits need a negative supply voltage that only has to supply a small current. Providing a separate transformer winding for this (pos...

1-12-2004 | This audio peak detector allows a pair of stereo channels to be monitored on a single LED.Identical circuitry is used in the left and right...

1-12-2004 | Valves are enjoying increasing popularity in audio systems. With the European ‘E’ series of valves, such as the ECC83 (12AX7) and EL84 (6BQ5...

1-07-2004 | The National Semiconductor LMV225 is a linear RF power meter IC in an SMD package. It can be used over the frequency range of 450 MHz to 200...

1-06-2004 | Analogue servos are really ingenious bits of hardware. But there’s an even better alternative: the digital servo! Based on the operation of...

1-01-2004 | LEDs have been around for years now but it’s only recently that things have started to get interesting with white and superbright versions a...

1-12-2003 | New applications for DC voltage converters, such as the ‘workhorse’ LT1070, arise every day. These converters can be adapted to nearly every...

1-11-2003 | Stepper motors, and in particular the way they must be driven, continue to riddle many of our readers. This two-part article is a solid base...

1-07-2003 | In order to measure the RMS value of an alternating voltage an accurate converter is required to produce the true RMS value of its alternati...

1-01-2003 | Switch-mode power supplies are not among the hobbyist’s favourite circuits. The specialised components are often hard to obtain, and mistake...