Thanks Phil!
That circuit's a bit pushed to operate from a voltage that low...
the resistor in series with the LED would have to be reduced in value.
The other slight problem is that DSE discontinued their kit for it
some time ago. Only Jaycar sells it now, as KA1778. See this tiny
project's web page for more details including the schematic and PCB
artwork at http://members.ozemail.com.au/~bobpar/ledvolt.htm
Thanks for the plug, though. It's nice to feel appreciated!
Bob
"Phil Allison" <philallison@optusnet.com.au> wrote:
"Gerry" <cynic@societ.sux.ok
...
I need to get my hands on a circuit diagram (and components list) for
a low voltage detector that would detect when DC voltage drops to 4.5v
and which would then ideally activate a very bright LED.
** DSE K 3118.
Dual led , adjustable battery voltage indicator.
On of Bob Parker's finest.
........ Phil
Thanks Phil!
That circuit's a bit pushed to operate from a voltage that low...
the resistor in series with the LED would have to be reduced in value.
The other slight problem is that DSE discontinued their kit for it
some time ago. Only Jaycar sells it now, as KA1778. See this tiny
project's web page for more details including the schematic and PCB
artwork at http://members.ozemail.com.au/~bobpar/ledvolt.htm
Thanks for the plug, though. It's nice to feel appreciated!
Bob
"Phil Allison" <philallison@optusnet.com.au> wrote:
"Gerry" <cynic@societ.sux.ok
...
I need to get my hands on a circuit diagram (and components list) for
a low voltage detector that would detect when DC voltage drops to 4.5v
and which would then ideally activate a very bright LED.
** DSE K 3118.
Dual led , adjustable battery voltage indicator.
On of Bob Parker's finest.
........ Phil
One question, Bob, if you don't mind.
Preamble: I bought the Jaycar kit and am in the process of assembling
it. I intend to replace the 1K resistor you refer to below with a 1K
trimpot. But..... I want a very bright (single colour only) LED to
indicate low voltage only (it has to be visible at some distance in
bright daylight) . I have the single color LED I want to use.
The question now is: How can I hook this LED up so that it indicates
low voltage only (I don't really need a "power on" indication)
Alternatively, it would be ok if this LED indicated "power on" as long
as it goes out when the low voltage threshold is reached.
On Mon, 29 Dec 2003 04:04:15 +1100, Bob Parker <bobp@bluebottle.com
wrote:
Thanks Phil!
That circuit's a bit pushed to operate from a voltage that low...
the resistor in series with the LED would have to be reduced in value.
The other slight problem is that DSE discontinued their kit for it
some time ago. Only Jaycar sells it now, as KA1778. See this tiny
project's web page for more details including the schematic and PCB
artwork at http://members.ozemail.com.au/~bobpar/ledvolt.htm
Thanks for the plug, though. It's nice to feel appreciated!
Bob
"Phil Allison" <philallison@optusnet.com.au> wrote:
"Gerry" <cynic@societ.sux.ok
...
I need to get my hands on a circuit diagram (and components list) for
a low voltage detector that would detect when DC voltage drops to 4.5v
and which would then ideally activate a very bright LED.
** DSE K 3118.
Dual led , adjustable battery voltage indicator.
On of Bob Parker's finest.
........ Phil