I got some piezo discs, hook one up to my multimeter, apply pressure to disc, get voltage, switch over to measure current, get nothing. I repeat same process with a second and third disc, and get same results. Ive seen people use these, not mine, but these same piezo discs to power an led hooked strait up and applying a little pressure. So, i should be getting at least some milliamps, but the meter never goes above or below zero. Its just zero. Not even a flash of a negative sign. What confuses me even more is that i get over 20 volts aka the disc seems to be generating electricity. Is it possible for a piezo disc to generate only voltage and zero current, or are they defective? And no, i did not try them all, only three. All three had same results. Voltage up to 20 some volts and zero current.
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