In today's video we take a quick look at what a capacitor is, how it is constructed and how to measure an unknown capacitor value. I ran across a double sided copper clad blank PCB and was curious about its capacitance value. We take a look at four different methods to determine an unknown value: 1. By measuring its time constant with a function generator and oscilloscope, 2. Configured as a low pass filter and measuring its 3dB down point with a dynamic signal analyzer, 3. Calculating the value based on physical dimensions, and 4. By using a low cost LCR meter. At the end we blow apart a small length of solder with a 75uF capacitor charged up to 1.5kV!