production
That may be, but like an old mechanical Timex watch, I just keep on ticking.
BTW, is that lead or lead, or maybe even lead? ;-)
production
A webpage at an office supply for mechanical pencil refills would also count as a hit.
Thanks for a lot of good ideas. I like the idea of the instrument op amp and some sort of a reasonable voltage source. Maybe I will check the stability of zeners for the source.
JakeInHartsel
Hell, one can sell the banned Freons if you have them; i was talking about the batteries being *made*.
Most zeners are not stable and one would have to calibrate it and put it in a constant temperature oven and... A number of *good* references have been mentioned that do not need that kind of babysitting.
Robert Baer wrote in news:oCPlg.8311$ snipped-for-privacy@newsread1.news.pas.earthlink.net:
TEK video generators had a nice simple 2 transistor circuit for a temp oven for their reference crystals,used a thermistor and a Darlington for the heater.The whole thing fit in a little metal box about 2" square. The oven will require some substantial amount of power,though,not really a battery type of project.
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