PRC as a amplifier in GPS question.

[rowan194]

Alex wrote:

i have always used my right details and i dont have any problems with spam

You're lucky then. The email I use for Google Groups gets regular spam
and phishing emails. Another email that I used back in 1996-97 when I
posted direct to usenet still receives spams today.

My 'real' email address - active since 1996 - receives several hundred
junk emails per day.

 

[Phil Allison]

"Rod Out Back"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...

** You use re-chargeable cells in a remote control ???




......... Phil

 

[Phil Allison]

"Tom Smyth"

One-use lithium are good.

** Continuous use is recommended in your case.




........... Phil

 

[Tom Smyth]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:44cncvF1j5iaU1@individual.net...

"Rod Out Back"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...



** You use re-chargeable cells in a remote control ???

One-use lithium are good.

 

[Mitchell]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:44cpevF1iedvU1@individual.net...

"Tom Smyth"

One-use lithium are good.


** Continuous use is recommended in your case.




.......... Phil

LOL

 

[Tom Smyth]

"Mitchell" <mmoules@bigpond.net.au> wrote in message
news:vabEf.233267$V7.156352@news-server.bigpond.net.au...

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:44cpevF1iedvU1@individual.net...

"Tom Smyth"

One-use lithium are good.


** Continuous use is recommended in your case.




.......... Phil


LOL

*rolls eyes*

 

[Rod Out Back]

On Thu, 2 Feb 2006 08:26:58 +1100, "Phil Allison"
<philallison@tpg.com.au> wrote:

"Rod Out Back"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...



** You use re-chargeable cells in a remote control ???




........ Phil

Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeables last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??


Cheers,

Rod.....Out Back

 

[Phil Allison]

"Rod Out Back"
"Phil Allison"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...


** You use re-chargeable cells in a remote control ???


Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeable last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??

** Very unusual for a remote to eat batteries like that.

Heavy duty or alkaline AA & AAA cells last years in typical TV or STB
remote.

Re-chargeables would be a very poor substitute due to self discharge in a
few months.




......... Phil

 

[David L. Jones]

Rod Out Back wrote:

On Thu, 2 Feb 2006 08:26:58 +1100, "Phil Allison"
philallison@tpg.com.au> wrote:


"Rod Out Back"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...



** You use re-chargeable cells in a remote control ???




........ Phil


Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeables last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??

Only in that normal remotes last for years off one set of batteries.
4 weeks is atrocious!

Dave

 

[Nicholas Sherlock]

Phil Allison wrote:

"Rod Out Back"
"Phil Allison"
I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...

** You use re-chargeable cells in a remote control ???

Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeable last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??



** Very unusual for a remote to eat batteries like that.

Heavy duty or alkaline AA & AAA cells last years in typical TV or STB
remote.

Re-chargeables would be a very poor substitute due to self discharge in a
few months.

Yes, but the Kameleon isn't a normal remote. It has a huge backlight on it.

Cheers,
Nicholas Sherlock

 

[Rod Out Back]

On 1 Feb 2006 17:36:19 -0800, "David L. Jones" <altzone@gmail.com>
wrote:

Rod Out Back wrote:
On Thu, 2 Feb 2006 08:26:58 +1100, "Phil Allison"
philallison@tpg.com.au> wrote:


"Rod Out Back"

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...



** You use re-chargeable cells in a remote control ???




........ Phil


Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeables last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??

Only in that normal remotes last for years off one set of batteries.
4 weeks is atrocious!

Dave

Have you looked at a Kameleon? There is a lot of re-programming the
buttons with every change of A/V selection. AND, it all back-lit. I'm
not surprised it uses battries, but it's very easy to use.

Anyway, it works for me. I keep a second set ready all the time, and
it hasnt let me down. Works very well, to be honest.


Cheers,

Rod.....Out Back

 

[two bob]

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...

Cost about $150, and does everything in the way of A/V gear, including
satellite. Given it reduced our remote collection from 6 to 1, I think
it was worth it...


Cheers,

Rod.....Out Back

Thanks Rod, i've always liked the look of those Kameleons.

Thou, if hardley normal has them for $150, you should be able to get them
cheaper almost anywhere else

 

[Peter Parker]

"Fonz" <r@removeme.com.au> wrote in message
news:43e039b1$1@dnews.tpgi.com.au...

Hi All.
Can anyone out there help me with a low noise 1W amplifier chip/circuit.
I
am currently using an LM386, and a TDA70?? (sorry I haven't got it with
me),
with less than ideal reults. The hiss is driving me nuts, as I'm using
headphones and I high gain setting (between 20 & 200).

I haven't done any detailed comparisons, but admit to being a big fan of the
TDA2822 over the venerable LM386. It's stereo not mono, draws little
current and is better behaved than the 386. I'd never use a 386 again and
wonder why so many projects still specify it.

My last use of one was to put one into an AM/FM stereo tuner to make it a
receiver. Made a loop antenna (25cm diameter), put a switch on the back to
extend coverage up to 1850 kHz and it works a treat on both local and
interstate stations. The dial lights dim when the volume is cranked to the
max, but it still provides a roomful of sound at lower settings before the
onset of distortion.

Peter

 

[Peter Parker]

"Pete" <pjetson@yahoo.com> wrote in message news:43e1c8ad@news.eftel.com...

Rheilly Phoull wrote:

Many large public libraries (particularly the state library) have large
collections of these magazines, and you may be able to photocopy the
article there.

Another good place are the libraries of those unis that have a strong
engineering faculty.

Eg RMIT in Melbourne.

 

There are many ways to skin the simple power amplifier cat.
If I were doing it I would first use a low-noise op amp which
would drive it's own output from rail to rail. Assuming that this gives
the proper voltage swing, it is only necessary to buffer the signal to
get some current-gain.
You could use a power amp chip like the Lm386 at a low gain
(-1V/V) or in my case being a transistor man, I would use some 2N2222A
and 2N2907A transistors to provide the muscle.

Many years ago the military got fed up with all of the different
transistors and told the industry to build a general purpose NPN and
PNP to do everything. The result was the NPN 2N2222A and the PNP
2N2907A.
These transistors have specified current gain from 10uA or so
right up to 0.25A and are quite robust. It may look tacky but there is
nothing wrong with a few of these in parallel to get the desired output
current and power-handling level. I would sprinkle some 10-ohm
resistors around to be sure the transistors share the current OK. and
also are short-circuit proof.
Finally, for the best fidelity, the op amp feedback is taken from
the transistor-buffer output so that the transistor buffer is inside
the feedback loop, such that the 1W output signal is a perfect, very
quiet, replica of the input signal.

Charles Gilbert
Consultant

 

I posted an answer. If questions, NonDigital@gmail.com.

Charles Gilbert
NonDigital.Netfirms.com

 

[Fraser Johnston]

"Nicholas Sherlock" <N.sherlock@gmail.com> wrote in message
news:drrstq$hue$2@lust.ihug.co.nz...

Phil Allison wrote:
"Rod Out Back"
"Phil Allison"
I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...

** You use re-chargeable cells in a remote control ???

Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeable last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??



** Very unusual for a remote to eat batteries like that.

Heavy duty or alkaline AA & AAA cells last years in typical TV or STB
remote.

Re-chargeables would be a very poor substitute due to self discharge in a
few months.

Yes, but the Kameleon isn't a normal remote. It has a huge backlight on
it.

Does it also have an LCD screen?

Fraser

 

[David L. Jones]

DeadNet wrote:

Has anyone succeeded in creating a thermometer using the LM355z
temperature sensor? I am keen to use it rather than the popular
ds18b20 because of cost and the calibration facilities it provides. I
just have not seen any circuit diagrams around.
I am new to electronics and the picaxe.
Any thoughts/pointers?

The LM335 is a simple zener shunt temp sensor, just a series resistor
is all you need, check the datasheet. The voltage is proportional to
temperature at 10mV/degK
If your PICAXE has an ADC input then you simply read the input voltage
from the sensor. Of course there are many ways to then display the
temperature - LCD display, LED display, serial upload to a PC etc.
There should be plenty of example circuit out there to do any of those
things.
The LM35 has a 10mV/degC which might be a bit more sensible for you.

Dave

 

[two bob]

I have a Kameleon remote that I bought at Harvey Norman. Thankfully,
it keeps the settings when the battery goes flat. Given we get about
3 weeks out of a charge of batteries, I'm bloody glad about that...

** You use re-chargeable cells in a remote control ???

Yes. It (Kameleon)uses 4xAAA cells, and the non-rechargeable last
about 4 weeks(re-chargeabls last about 3 and a bit). I have 2 sets of
Ni-MH cells, and have one set ready to go all the time.

Why, Is there some problem with this??



** Very unusual for a remote to eat batteries like that.

Heavy duty or alkaline AA & AAA cells last years in typical TV or STB
remote.

Re-chargeables would be a very poor substitute due to self discharge in a
few months.

Yes, but the Kameleon isn't a normal remote. It has a huge backlight on
it.

Whoopy bloody do. If that is its major feature watch out world. Changing
batteries every few weeks in a remote is obscene.

 

[Phil Allison]

"crazy frog"

if its a silicon chip kit from dick smith etc.
log on to silicon chip to fined it.

** LOL

The Playmaster 141 is from EA, May 1974.

Silicon Chip began publishing in late 1987




........... Phil