| 摘要 |
A flashing circuit in which a capacitor is charged through a path whose conductivity varies with the applied voltage across the path. The path includes a transistor whose input current is a function of the applied voltage when the capacitor charges to a predetermined potential; a programmable unijunction transistor breaks down to discharge current from the capacitor through a light-emitting diode. The breakdown of the unijunction transistor applies a change in bias to the base of the transistor in the charging path so as to minimize the charging current and also effects the cutoff of a second transistor in the discharging path and which is in parallel with the light-emitting diode to cause all capacitor current to flow through the light-emitting diode.
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