Author Topic: Power Supply / Battery Charger  (Read 7645 times)

Offline 75Plus

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Power Supply / Battery Charger
« on: January 03, 2010, 11:13:55 AM »
Several years ago, 1987 to be specific, I designed and built a combination Ni-Cad battery charger and bench power supply. (Ni-Mh batteries were not here yet)

The requirements were that it would be variable in voltage and current. This was so that a wide range of voltage and current capacity batteries could be charged. The voltage ranged from 1.2 to 15 volts and the current was from 20 ma to 1.5 amps.

I wrote it up as a construction project and it was published in "73 Amateur Radio" magazine in Dec. 1987. I am showing the schematic here. If anyone is interested I can furnish additional info.

Joe

 

Offline Bernd

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Re: Power Supply / Battery Charger
« Reply #1 on: January 03, 2010, 05:02:50 PM »
Thanks Joe.

That's going to come in mighty handy since I need a charger for 6 volts battries.

Bernd
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Offline John Rudd

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Re: Power Supply / Battery Charger
« Reply #2 on: January 03, 2010, 05:33:28 PM »
Thanks Joe.

That's going to come in mighty handy since I need a charger for 6 volts battries.

Bernd

Bernd...Might I interject..?

what battery chemistry did you have in mind?


Not all batteries are the same, I'm sure you know... :thumbup:


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Offline Bernd

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Re: Power Supply / Battery Charger
« Reply #3 on: January 03, 2010, 09:37:56 PM »
Sure you may interject.

They are sealed batteries. I believe they are lead acid since the note on the side says something about lead.

Let me guess this charger won't work for these batteries, right?

Bernd
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Offline 75Plus

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Re: Power Supply / Battery Charger
« Reply #4 on: January 04, 2010, 10:05:23 AM »
Over the past 20 odd years I have used this power supply to charge lead-acid, Ni-Cad, N-Mh, Li-ion and rechargeable Alkaline batteries. I have NOT, nor have I ATTEMPTED to, charge any battery that was not DESIGNED to be recharged.

Joe

Offline Bernd

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Re: Power Supply / Battery Charger
« Reply #5 on: January 04, 2010, 03:49:14 PM »
Joe,

I figured it be all right to use to charge lead batteries. It looked similar to a charger I once used to charge some batteries back when I was interested in robotics.

Bernd
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