Special keyboard circuit board for automatic ticket selling and checking equipment

The utility model discloses a special keyboard circuit board for automatic ticket selling and checking equipment. The keyboard circuit board comprises a double-sided PCB (printed circuit board), a USB (universal serial bus) 1.1 interface, a capacitor C1, a resistor R1, an oscillating circuit, a ligh...

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Bibliographic Details
Main Authors SHAO DONGBO, SUN YONGQUAN, XIONG ZHENXING, ZHOU HUBIN, XIE FENG
Format Patent
LanguageChinese
English
Published 05.11.2014
Subjects
CALCULATING
CHECKING-DEVICES
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
FARE-REGISTERING APPARATUS
FRANKING APPARATUS
PHYSICS
TICKET-ISSUING APPARATUS
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Summary:The utility model discloses a special keyboard circuit board for automatic ticket selling and checking equipment. The keyboard circuit board comprises a double-sided PCB (printed circuit board), a USB (universal serial bus) 1.1 interface, a capacitor C1, a resistor R1, an oscillating circuit, a light emitting diode D1 and an AT89S51 single-chip microcomputer, wherein a lead 17 of the AT89S51 single-chip microcomputer is connected with a lead 3 of the USB 1.1 interface; a lead 16 and a lead 18 are connected with a lead 2 of the USB 1.1 interface; a lead 27 is connected with the capacitor C1 and is grounded; a lead 28 is respectively connected with the capacitor C1 and the resistor R1; a lead 29 and a lead 30 are connected with the oscillating circuit; a lead 1 of the USB 1.1 interface is respectively connected with the resistor R1 and the light emitting diode D1; the light emitting diode D1 is connected with a lead 8 of the AT89S51 single-chip microcomputer; a lead 15 of the AT89S51 single-chip microcomputer a
Bibliography:Application Number: CN20142277142U