CIRCUIT FOR MEASURING THE IGNITION SPEED

摘要

a first phototransistor for sensing an initial ignition state of a heat pellet; a second phototransistor for sensing a final ignition state; first and second regulators whose input terminals are each connected to the first and second phototransistors via first and second amplifying circuit, respectively and whose output terminals are each connected to a counter through a latch circuit; a frequency dividing circuit for dividing an output frequency of an oscillating circuit to transmit the divided frequency to the counter; and a display device to which the output signal of the counter is applied through a display drive circuit.