Equation 4 calculates the series resistor power dissipation. The resistor will be hot. Make sure to choose a resistor rated for high power dissipation. Also choose a low-inductance resistor especially ...

A piezo tweeter has an impedance (this is a posh word for resistance for our purposes) of something like five kiloohms. The 30 ohm resistor would increase this to 5,030 ohms. Individual variances ...

The piezoelectric sensor (piezo disc) drives a load resistor of 1MΩ in parallel with a 5.1v zener diode (there is a 10KΩ resistor in between) just to protect the LM393 comparator against any large ...

Fig 4. Exposing the modified pressure sensor to laser energy created a temperature-induced change in the piezo-resistive element’s resistance that corresponded directly to laser power.