RE: Howzat work then?

["Paul Gordon" <paul_gordon@xxxxxxx>]

I think that's the answer - I just did some testing with various other
PSU's
I had lying around, - one from a one-for-all IR repeater = same result, one
from an old Sony Discman, = well it sort of worked! - the audio transmits,
but it is of a drastically lower quality than when running off the battery.

Does this mean the problem is due to poor quality rectification of the AC
sinewave to DC? - could the el-cheapo wallwarts be doing half-wave
rectification only? If that's the answer, then presumably my Sony Discman
PSU must have been doing full-wave rectification, as the circuit works when
using this one, but it's a bit worrying that the audio quality was so poor,
- is this likely to occur with a "decent" PSU as well? - I'd hate
to go out
& spend £20 on a decent regulated PSU only t  have the same problem!

Paul G.



>From: Mike Griffiths <mike@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx
>To: "'ukha_d@xxxxxxx'" <ukha_d@xxxxxxx>
>Subject: RE: [ukha_d] Howzat work then?
>Date: Mon, 2 Jul 2001 09:43:28 +0100
>
>I think Keith has the answer then as it does say Regulated PSU under
>circuit
>testing :-(
>I must admit I would have pugged up a wallwart too
>
>Mike
>
>Sent from Home
>
>-----Original Message-----
>From: Paul Gordon [mailto:paul_gordon@xxxxxxx]
>Sent: Mon 02 Jul 01 09:38
>To: ukha_d@xxxxxxx
>Subject: RE: [ukha_d] Howzat work then?
>
> >Paul
> >Does the  wall-wart work anything else?
>
>Tests OK with the spare bulb from my Maglite.... (in fact I've got a
blind
>spot right in the middle of my vision 'cos it was so bright!!!)
>
> >What happens if you run it at 9v?
> >
>
>The same, - the LED on the PCB comes on as it should, so the circuit
has
>power t  it, but ****-all is being transmitted...
>
>Paul G.
>
>_________________________________________________________________________
>Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
><http://www.hotmail.com.>
>
>
>
>
>____________________________________
>Automated Home UK
>http://www.automatedhome.co.uk
<http://www.automatedhome.co.uk>
>____________________________________
>
>Your use of Yahoo! Groups is subject t  the Yahoo!
><http://docs.yahoo.com/info/terms/>
 Terms of Service.

_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.




____________________________________
Automated Home UK
http://www.automatedhome.co.uk
____________________________________

Your use of Yahoo! Groups is subject t  http://docs.yahoo.com/info/terms/