Twenty Rows' 2012 Cabernet Sauvignon was harvested in mid-to-late October from appelations across Napa Valley including Mt. Veeder, Coombsville, and Oak Knoll. The Cabernet Sauvignon fruit also includes 4% Petite Verdot, 4% Cabernet Franc, and 2% Malbec.
Zener diode is a diode which is used in its break down region. The diode is kept reverse biased in a circuit, and so it does not allow current to pass until the voltage is greater than the breakdown voltage of the zener.
Finally, the output of this line is a conditioned signal of low current (due to the resistor), with a square voltage wave alternating between 0 and 5 Volts (due to the zener), where one square represents the current responsible for spark generated by the ignition coil (due to the low-pass filter).