Author Topic: Power Supply / Battery Charger  (Read 4764 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
You can't fix "STUPID".

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
You can't fix "STUPID".

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
You can't fix "STUPID".