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You could go to the dollar store and buy ten cheap 9-volt transistor batteries and snap them together + to - and get 90 volts for your test. You might be surprised how long they would last, too. If you need intermediate voltages just capture a wire between snapped terminals at the appropriate point between batteries. Ditto for your 1.5 volt supply: put a couple of D cells in parallel for more amp-hours.
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Reece
Perfection is hard to reach with a screwdriver.
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