I've been using Zen for about 6 months now (used to be on UKFSN). I don't know if they do all you want but they seem OK for what I want, which is general ADSL speed, website provision and landline phone. They also provide remote backup service.

As a matter of interest does anyone know if there's a company that still sells bare keyboards with just the contact strips? Maplin's used to sell them... but that was in the middle 1970s! How bare do you need? Doepfer sell Fatar keybeds. You can find them on the Accessories and Spare Parts pages. A...

Martin Walker wrote:

MarkOne wrote:wobblyphonic

I LIKE that a lot MarkOne!

Martin

That's what you get from a stretched tape isn't it?

Always nice to see another {cough} mature {cough} techie on here. There are too few of us about!

Never really got into class D amps myself - had my fingers burned too many times with switch mode PSUs

As a matter of interest does anyone know if there's a company that still sells bare keyboards with just the contact strips? Maplin's used to sell them... but that was in the middle 1970s!

Hmm, shurely, as Desmond says, each voice in a polyphonic synth goes thru it's own filter. Then it would be 'polyphonic' (Prophet 5, JP8, MemoryMoog, OBXa, Juno6/60/106 and so on). Paraphonic is a polyphonic sound source (cheapest way to do that is a divide down oscillator) through a single filter ...

I sprained my LH 4th finger about 2 months ago - slipped in the kitchen and caught it on the worktop. It was very painful, soon swelled up and went interesting colours over the next few days. I made a point of exercising it as much as possible, just wiggling but not quite enough for it to hurt, and ...

Dude, ever since we got broadband porn, everyone works from home. I thought everyone knew this. Apparently some 66% of visits to porn sites occur during office hours. "You are held in a queue. Your call is important to us. Please stay on the line" suddenly takes on a whole new meaning, do...

Too many people making very slightly different comments so I'll add one more clarification then bow out. If the speaker resistance is lower than the amp's rating it may well deliver the power, but have an extremely short life as it stresses various parts and overheats.. I think shufflebeat tried to ...

KISS principle :) Unless you have a very special setup and know exactly what you're doing, all speakers should be the same impedance and power rating. 2 Speakers in series: Amp sees twice the impedance so delivers half the total power, shared equally between the speakers. Each now gets a quarter of ...

I don't have the space
I don't have the time
I don't have the money

So, will you lot stop rattling my cage

P.S.
I can't help it, I just have to look

So at zero resistance you have 100% feedback and zero output, is that it? Thanks again. Bill Nearly :) You have 100% feedback alright , but x1 output - it becomes a simple voltage follower. But look at those input resistors, their ratio gives about x20 attenuation, hence the output is attenuated by...

Best not mention Linux then, they'd probably send the heavy mob round

{drool}

As Hugh said, yes, and yes. However... I wouldn't recommend doing output control that way, because you'd lose your overload margin. If you had the output control halfway then the Op Amp would still be able to deliver 9V (from a PP3) but you would only be able to drive your load to 4.5V. A better way...

OK, drawing is here . I've shown three inputs, but you can add more. This is not a true summing amplifier, so there will be a very small amount of interaction between the inputs. The output can go from zero to the full supply voltage and is pretty short circuit proof. Overdriving the inputs won't do...

When thinking about responsiveness, instead of total storage used, the number of separate files and the complexity of the directory structure can make a lot of difference, especially on well used hard drives. File "aardvark" in directory "abacus" is not necessarily the first item...

Seriously impressive. Best of luck.

In that case, if you are happy with about 5% accuracy you can use an even simpler circuit than the ones you found. There is a chip the Texas Instruments LMC6041, that is low current and will work very comfortably from a single supply such as a PP3. At around £1.50 its twice the price of your bog sta...

Does it actually need + and - voltages? If not, a very simple single OpAmp circuit run from a single rail supply will do the job and be reasonably accurate. If you need both swings then you need dual rail supplies. A slightly more complicated circuit using a twin OpAmp package will be very accurate ...