Electromagnetic-pump control circuit

Abstract

Abstract PURPOSE:To obtain an electromagnetic-pump circuit having the superior voltage characteristic for the variation of power voltage, by applying a power having a constant voltage into a microcomputer and a one-shot multivibrator and inputting a nonstabilized voltage into the one-shot multivibrator. CONSTITUTION:A constant voltage is input into a microcomputer 16 by a constant-voltage element 15. Said microcomputer 16 outputs the pulses having a certain duty in a certain cycle. The transistor 27 of a one-shot multivibrator 34 is operated by the output signal, and the charge and discharge of a condenser 32 are controlled. A nonstabilized power voltage which receives the variation of voltage is connected to the condenser 32 through a resistor 21. A photocoupler 10 is operated according to the charged state of the condenser 32. A transistor 11 is controlled by the operation of the photocoupler 10, and an electromagnetic pump 5 is operated.

Inventors

• 👤 Yasushi Suzuki
• 👤 泰 鈴木
• 👤 Mitsuyasu Watanabe
• 👤 渡辺　光靖

Bibliographic Details