Random password keyboard circuit

  
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Design, the front panel buttons to set the 10 number keys and the keys 0-9, move the key, down health, Enter, i recover key, door key j count 16 keys. Ding also features in the
Random password keyboard circuit - schematic

interior door key, in addition, the design of a mold swaddling clothes button. When the card reader shirk success. Round drive relay station is closed, so that Kl, K2 connection, 10ms after closing relay station, Kl, K2 off, thus simulating access key action,




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