Documentation for “Zerocat Dev Kit”
Generated on: Tue, 03 Jun 2025 21:18:10 +0200
Repository: git://zerocat.org/zerocat/projects/zerocat-dev-kit.git
Version: 2117b7b4b
Branch: master

../hardware/system/gschem/keypad.bom.txt.html

# Bill of Material “keypad”


Footprints are named according to gEDA/gaf and PCB footprint naming convention.


## Sheet “keypad-page01.sch”


### Pattern per Record


* refdes

    - device
    - value
    - footprint
    - description
    - comment
    - qty


### Bill


* R1

    - RESISTORPACK_8
    - 47K
    - SIP9
    - unknown
    - unknown
    - 1

* S1,S10,S11,S12,S13,S14,S16,S17,S18,S19,S2,S20,S21,S22,S23,S24,S26,S27,S28,S29,S3,S30,S31,S32,S33,S34,S35,S36,S37,S38,S39,S4,S40,S5,S6,S7,S8,S9

    - SWITCH_PUSHBUTTON_NO
    - unknown
    - TACT_6x6_4p
    - unknown
    - unknown
    - 38


## Sheet “keypad-page02.sch”


### Pattern per Record


* refdes

    - device
    - value
    - footprint
    - description
    - comment
    - qty


### Bill


* S41,S42,S43,S44,S45,S46,S47,S48,S49

    - SWITCH_PUSHBUTTON_NO
    - unknown
    - TACT_6x6_4p
    - unknown
    - unknown
    - 9

* R2

    - RESISTORPACK_8
    - 47K
    - SIP9
    - unknown
    - unknown
    - 1


## Sheet “keypad-page03.sch”


### Pattern per Record


* refdes

    - device
    - value
    - footprint
    - description
    - comment
    - qty


### Bill


* U1

    - 74HC238
    - unknown
    - DIP16
    - 3 to 8 decoder/demultiplexer; noninverting
    - unknown
    - 1

* C1

    - CAPACITOR
    - 100nF
    - RCY100
    - capacitor
    - Blocking Cap for U1
    - 1

* R10

    - RESISTOR
    - 10K
    - ACY500
    - unknown
    - unknown
    - 1

* D1,D2,D3,D4,D5

    - DIODE
    - 1N4148
    - ALF400
    - unknown
    - unknown
    - 5


## Sheet “keypad-page04.sch”


### Pattern per Record


* refdes

    - device
    - value
    - footprint
    - description
    - comment
    - qty


### Bill


* U2,U3

    - 74151
    - unknown
    - DIP16
    - 8 to 1 multiplexer
    - unknown
    - 2

* U4

    - 7400
    - unknown
    - DIP14
    - 4 NAND gates with 2 inputs
    - unknown
    - 1

* C2

    - CAPACITOR
    - 100nF
    - RCY100
    - capacitor
    - Blocking Cap for U2
    - 1

* C3

    - CAPACITOR
    - 100nF
    - RCY100
    - capacitor
    - Blocking Cap for U3
    - 1

* C4

    - CAPACITOR
    - 100nF
    - RCY100
    - capacitor
    - Blocking Cap for U4
    - 1


## Sheet “keypad-page05.sch”


### Pattern per Record


* refdes

    - device
    - value
    - footprint
    - description
    - comment
    - qty


### Bill


* J1

    - CONNECTOR_20
    - unknown
    - JUMPER20
    - unknown
    - unknown
    - 1

* C5,C6

    - POLARIZED_CAPACITOR
    - 10�F
    - RCY100P
    - polarized capacitor
    - unknown
    - 2