SB-mini-II
simonboak
A homebrewed Apple II clone
Components (43)
| Reference | Value | Description |
|---|---|---|
| Q1 | MPSA13 | NPN Darlington transistor, emitter/base/collector |
| Q2 | PN2222A | 1A Ic, 40V Vce, NPN Transistor, General Purpose Transistor, TO-92 |
| Q3 | IRF5305 | -74A Id, -55V Vds, Single P-Channel HEXFET Power MOSFET, 20mOhm Ron, TO-220AB |
| U1,U13 | 74HC74 | Dual D Flip-flop, Set & Reset |
| U2 | 65C02 | 8-bit CMOS General Purpose Microprocessor, DIP-40 |
| U3 | 74HC08 | Quad And2 |
| U4-U6,U11 | 74HCT138 | Decoder 3 to 8 active low outputs |
| U7 | 74HC259 | 8-bit addressable latch |
| U8,U9 | NE556 | Dual Precision Timers, DIP-14/SOIC-14 |
| U10 | 74HC30 | 8-input NAND |
| U12,U17 | 74HC00 | quad 2-input NAND gate |
| U14 | 74HC251 | Multiplexer 8 to 1, 3-state Outputs |
| U15 | 28C256 | Paged Parallel EEPROM 256Kb (32K x 8), DIP-28/SOIC-28 |
| U16,U18 | CY62256 | 256K (32K x 8) Static RAM, 70ns, DIP-28 |
| U19 | 74HC244 | 8-bit Buffer/Line Driver 3-state |
| A1 | RaspberryPi_Pico | Versatile and inexpensive microcontroller module powered by RP2040 dual-core Arm Cortex-M0+ processor up to 133 MHz, 264kB SRAM, 2MB QSPI flash; also supports Raspberry Pi Pico 2 |
| C1,C6,C7,C9-C28 | 0.1µF | Unpolarized capacitor, small symbol |
| C2-C5 | 22nF | Unpolarized capacitor, small symbol |
| C8 | 470µF | Polarized capacitor |
| D1 | 1N914 | 100V 0.3A Small Signal Fast Switching Diode, DO-35 |
| D2 | 1N5240B | Zener diode |
| D3 | PWR LED | Light emitting diode |
| J1 | GAME I/O | Generic connector, double row, 02x08, counter clockwise pin numbering scheme (similar to DIP package numbering), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J2 | DEBUG | Generic connector, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J3 | 12V Input | DC Barrel Jack with an internal switch |
| J4 | Power Switch | Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J5 | Pololu 5V 1A Step-Down Voltage Regulator (D24V10F5) | Generic connector, single row, 01x05, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J6 | Apple II Power Connector | |
| JP1 | HI ROM | Jumper, 2-pole, open |
| JP2 | SHIFT KEY MOD | Jumper, 2-pole, open |
| LS1 | Speaker | Speaker |
| R1-R5,R12 | 3k3 | Resistor |
| R6,R17 | 1k | Resistor |
| R7 | 2k5 | Resistor |
| R8-R11 | 100 | Resistor |
| R13 | 10K | Resistor |
| R14 | 47k | Resistor |
| R15 | 27 | Resistor |
| R18 | 100k | Resistor |
| R19 | 330 | Resistor |
| Slot0-Slot7 | Expansion Slot | Apple II bus connector. Use this symbol on the motherboard side, either on Apple II-compatible motherboards, or on boards that are designed to take Apple II peripheral cards. |
| SW1 | RESET | Push button switch, generic, two pins |
| Y1 | 4MHz | Crystal Clock Oscillator, DIP8-style metal package |