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Battery capacity tester-was flyback diode, now clock sour

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nuckolls.bob(at)aeroelect
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Posted: Sat Jul 20, 2013 8:38 am Post subject: Battery capacity tester-was flyback diode, now clock sour

 	  Quote: 	
		  I went ahead and added the coil diode per yours and Bob's advice. As 

for the clock, I gave up on finding an AC clock.  I didn't want an 

AC dependent time piece anyway.  I just piggy-backed an 8V regulator 

(MC7808C)  I had on hand and a couple of resistors for a voltage 

divider to give me a regulated 1.8 volt supply that seems to work 

just fine with the quartz clock I got at Goodwill for $1.


	


   Good workaround . . .

 	  Quote: 	
		  Boy, that 55W light bulb sure gets warm after a few minutes.  I bet 

a big ol'  heat sink and a surplus computer cooling fan would 

probably extend bulb life.  Back to the workbench!


	


   Yeah, they do. Not sure how you would heat sink

   it . . . most of the energy is radiated. But a fan

   would help. A salvaged 12v cooling fan from a computer

   should be low-cost option. The one I'm finishing up

   on the bench has 3 lamps. Let me know how the fan

   thingy works out for you. I might just do the same

   thing with this one.

   Bob . . .

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