Nuts & Volts - January 2006

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This is a READER-TO-READER Column.

All questions AND answers are submitted by Nuts&Volts readers and are intended to promote the exchange of ideas and provide assistance for solving problems of a technical nature. Questions are subject to editing and will be published on a space available basis if deemed suitable by the publisher. Answers are submitted by readers and NO GUARANTEES WHATSOEVER are made by the publisher. The implementation of any answer printed in this column may require varying degrees of technical experience and should only be attempted by qualified individuals. Always use common sense and good judgement!

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QUESTIONS

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❶ Circuit Design

❷ Electronic Theory

❸ Problem Solving

❹ Other Similar Topics

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94 January 2006

>>> QUESTIONS

I have six six-volt batteries wired in series to achieve 36 volts. I have tapped the neg to the pos across two batteries and got 12 volts.

Can I wire all three (sets of two) and get 12 volts with lots of amps and run a large inverter? That would be running series and parallel in one operation. I would have to be using both sources at the same time. Maybe switches would work?

I had my hip replaced last week and am working on projects to complete after rehabilitation.

#1061 ■Greg Nenni, via Internet

custom chips in them, then I guess my idea is dead, but if one of them has something like a generic PIC in it, then maybe I could get something going. What can you tell me about them?

#1063 ■Mark Mickelsen, via Internet

>>>> ANSWERS

[#11052 - November 2005]

I have a Proview Technology color-monitor model 986 N. To repair it, I need two ICs — TDA 9536 video amplifier and TDA 9210 video pre-amp. Does anyone know where I could get these chips at a reasonable price?

I have searched the world over for the Data Sheet on the TI's TMS9916NL chip. Any help would be appreciated.

#1062 ■Brent Lamb, via Internet

I just got a digital caliper for the first time and I love it, mostly. I would like it to display measurements in a third way besides inches and millimeters. I would like to know if there are any digital calipers out there that have generic microcontrollers in them that could possibly be reprogrammed or replaced with one with my own programming in it. If they all have

After an extensive search on the Internet I was able to locate the ICs that Mr. Eddy needs. If he goes to the site www.noahtec.com/xcart/cus tomer/ home.php?cat=253&page= 11 he can order the two TDA ICs he needs; TDA9210 and TDA9536 both cost $4.50 plus shipping and handling. Any questions he has he can e-mail the company directly.