|
|
|
Bridge Adaptor For Stereo Power Amplifiers
16 July 2008
Would you like to connect a stereo amplifier in "bridge mode" in order to deliver double the power to a single loudspeaker system? This simple adaptor allows you to do it, without any modifications being necessary to the power amplifiers themselves.
|
|
Balanced Mic Preamp For PCs & MP3 Players
14 July 2008
Want to connect a professional microphone with balanced outputs to the line input of your PC's soundcard or an MP3 player, for high-quality voice recordings? This microphone preamp circuit lets you do just that. It features a balanced input, has a clipping indicator LED and can be powered from a USB port or from an external DC source.
|
|
A PIC-Based Musical Tuning Aid
12 July 2008
This compact device will help you tune almost any musical instrument - acoustic or electronic. It can produce any note on the tempered musical scale (standard pitch) in any of the eight most commonly used octaves, with an accuracy of better than ±0.08% or 1.3 musical cents. The selected note is compared with that from the instrument either by ear or visually by using an eight-LED stroboscopic beat indicator.
|
|
Vintage Radio
10 July 2008
Developed during the very early days of radio, reflex circuits were used in receivers right up until the 1950s. One such set was the Astor KM.
|
|
|
DSP Musicolour Light Show; Pt.2
05 July 2008
In last month's first part, we described the circuit operation of the DSP Musicolour. In this instalment, we guide you through the construction. The operation of the firmware and troubleshooting tips will be described next month. In this issue there are also notes and errata for the schematic published last month.
|
|
|
Circuit Notebook
05 July 2008
Interesting circuit ideas which we have checked but not built and tested. Contributions from
readers are welcome and will be paid for at standard rates.
|
|
House Wiring: Looking At Light Switches
02 July 2008
A light switch is a light switch, right? You just flick it and the light comes on . . .
Of course - but it is very obvious that many people think what goes on behind the architrave or wall is a black art. Magic, even!
|
|
A Look At Crash Test Dummies
30 June 2008
Ever seen those video clips of car crash tests where the dummies are thrown about like rag dolls? The dummies are highly engineered to simulate the effect of crashes on human bodies and they carry lots of instrumentation to record the pain (forces & deflections) they suffer.
|
|
USB Power Injector For External Hard Drives
26 June 2008
A portable USB hard drive is a great way to back up data but what if your USB ports are unable to supply enough "juice" to power the drive? A modified version of the SILICON CHIP USB Power Injector is the answer.
|
|
|
|
|
|
|
