andrew Ivimey wrote:yeah but 317 - yuk city! I was thinking about 15 volt regulator into 9 into five volt regulator
Well if you are going to get all sniffy over my suggestion of the LM317....
Then you could go upmarket for more money and use an ALW super regulator and put the icing on with a Gyrator (cap multiplier) as the pre-regulator...
Did Andrew mean 12V & 5V reg chips? LM317 not very different, just adjustable so will do both
Is the Wall Wart SMPS or transformer?
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
Dave the bass wrote:Reading the above, I think I've just acquired another winter project then... a linear PSU for the SBT for compare/contrast purposes
See no reason to put the regulator after the choke, all you will end up doing is hearing the effect of the regulator. It may seem odd but I'd put the choke after the regulator, its only there to stop the voltage rising above 5v.
The choke after the regulator will knacker the regulation but it will draw power smoothly (may need to lower the value of the cap after the rectifier) and you can experiment with choke input or output cap types and values.
just swapping back from USB to Wi-Fi connection to PC and it won't re-scan - oh deep joy so, while I'm typing this I thought, 'nowt to lose, I'm going for the latest download!'
Let's see eh.
Oh how we love probems and difficulties.
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.