Is there a simple way to float charge 5 or 6 AA , or a 9v Nicads, to back up a 5v powered logic circuit. I dont need looong running times, just back up for the occasional power failure, or when Im moving the circuit to another outlet.
ya know...I really didn't think bout that...I would still like to see if I could float some batteries...just so I can try it in other circuits. I haven't really found too much on a google search
Ni-Cads are obsolete and are very toxic. The ones I used many years ago all became shorted. Does anybody sell them anymore? Even very cheap Chinese solar garden lights use modern Ni-MH batteries now.
Modern Ni-MH cells hold their charge for one year. If you trickle charge them it can be at an extremely low current.
ok...my bad Audio Guru...My Canadian brother....you are absolutely correct.
I REALLY should have said NiMh... I actually have a lot of 'em around, as I use them for my RC stuff. I have dropped off all my NiCads out to the Hazardous Waste people at the dump a few months ago...I had a lot of those as well...most came with my Futaba stuff.
Now back to the question at hand.....
Is there a simple way to float charge 5 or 6 AA , or a 9v Nicads, to back up a 5v powered logic circuit. I dont need looong running times, just back up for the occasional power failure, or when Im moving the circuit to another outlet.
With that in mind, google: "ni mh battery float charger circuit" (what I used to find the above site - 4th entry). Be forewarned that many circuits posted on the web either do not work or are seriously flawed.
With that in mind, google: "ni mh battery float charger circuit" (what I used to find the above site - 4th entry). Be forewarned that many circuits posted on the web either do not work or are seriously flawed.
Yes , thats why I come here for info...there are a million schematics on the web....and probibly 99.9% DONT WORK. Every schematic that Ive used from this site has been 100% correct