Looking for Discharging circuit for these battereis. Thanks

bigdaddy wrote:
Looking for Discharging circuit for these battereis. Thanks

I posted a description of one about two weeks ago.

Here it is again:

take a 5v relay and wire its coil in series with its normaly open contacts.
In paralllel with the coil, wire a discharge resistor and an indicator.
The indicator would be a 1k resistor in series with an LED or a light bulb,
whatever you have handy.

For the resistor use one that will give you about a half an amp at the
voltage you want and as large a power rating you can get. 10 Ohm, 10
Watt is good for 6 volt batteries. Remember that it will get hot, so
place it "in the air" with some ventilation.

Wire a momentary contact switch across the relay contacts to act as a start
switch.

To use, press the button on the momentary contact switch. The current drawn
will discharge the battery, light the indicator and keep the relay energized.
When the battery voltage goes to low to keep the relay closed, it will open
and stop the cycle. This prevents problems caused by discharging the battery
too far.

Geoff.
--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
IL Voice: (07)-7424-1667 IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838
Visit my 'blog at http://geoffstechno.livejournal.com/

See Maxim's Application note number 172



"bigdaddy" wrote in message
...
Looking for Discharging circuit for these battereis. Thanks

Actually, make that application note 936. I have a copy of an app note that
has number 172 on it, but a Google search for Maxim app note 172 brings up
something different. This may not be totally what you are looking for, but
it may give you an idea.
http://www.maxim-ic.com/appnotes.cfm/appnote_number/936


"Mike" wrote in message
...
See Maxim's Application note number 172



"bigdaddy" wrote in message
...
Looking for Discharging circuit for these battereis. Thanks

Thanks for the reply. But I wanted it for Ni-MH, I do not know
whether it would be suitable for Ni-MH batteries.

On Fri, 12 May 2006 11:09:07 -0500, "Mike"
wrote:

Actually, make that application note 936. I have a copy of an app note that
has number 172 on it, but a Google search for Maxim app note 172 brings up
something different. This may not be totally what you are looking for, but
it may give you an idea.
http://www.maxim-ic.com/appnotes.cfm/appnote_number/936


"Mike" wrote in message
...
See Maxim's Application note number 172



"bigdaddy" wrote in message
...
Looking for Discharging circuit for these battereis. Thanks