2 layers182 × 138.8 mm
-816-board
snippyrow/-816-board
A retro computer motherboard for the W65C816S CPU. Dual-core expandable, 16mb extended memory, four expansion ports.
141 partsMIT
2 layers179.5 × 235.8 mm
Reverse-engineering the Brother KH-970 knitting machine
- Size
- 179.5 × 235.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 128
- Nets
- 139
- Pads
- 580
- Tracks, vias
- 5,535, 374
- Pours
- 297
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 16 Feb 2025
- Updated
- 18 Feb 2025
Overview
Cb-1 is an open-source printed circuit board by jonathanperret, from the jonathanperret/kh970-research repository on GitHub. It is a 2-layer board of 179.5 × 235.8 mm with 128 parts on 139 nets, routed with 5,535 tracks and 374 vias.
It is built around the 74HC04D, 74HC138 and 74HC373D, with the 74LS32SC, AMS1117-5.0 and CR2032 among its other parts. Its parts include 40 resistors, 21 switches, 19 capacitors, 10 ICs and 10 diodes.
Main components
6
74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters
74HC138
SOP-160℃~+70℃ 24ns@5.0V,16pF 2V~6V 3/8 5.2mA 5.2mA 5uA 74HC Decoder Reverse function Single Supply SOP-16 Signal Switches, Multiplexers, Decoders ROHSGRSignal Switches, Multiplexers, Decoders
74HC373D
SOIC-20-300mil-40℃~+125℃ 10ns 12ns 2V~6V 5ns 7.8mA 7.8mA 74HC 8 8uA D Latch Tri-State SOIC-20-300mil Latches ROHSNexperiaLatches
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
AMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CR2032
-- Unclassified goods ROHSMaxellUncategorised
Parts
128| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R10, R11, R13, R14, R15, R16, R17, R18, R20, R21, R22, R23, R24, R26 +24 |
| 17 | C | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C12, C13, C14, C15, C16, C17, C18, C20, C21, C22, C23, C24, C28, C30, C31 +1 |
| 9 | D | Diode_THT:D_DO-34_SOD68_P10.16mm_Horizontal | D1, D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | ~ | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 3 | R_Network04 | Resistor_THT:R_Array_SIP5 | RA1, RA2, RA5 |
| 2 | NetTie_2 | NetTie:NetTie-2_THT_Pad1.0mm | NT1, NT2 |
| 2 | ~ | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C5, C9 |
| 1 | . | Button_Switch_THT:SW_PUSH_6mm | SW17 |
| 1 | 0 | Button_Switch_THT:SW_PUSH_6mm | SW21 |
| 1 | 1 | Button_Switch_THT:SW_PUSH_6mm | SW18 |
| 1 | 2 | Button_Switch_THT:SW_PUSH_6mm | SW14 |
| 1 | 27C040 | Package_DIP:DIP-32_W15.24mm | U8 |
| 1 | 3 | Button_Switch_THT:SW_PUSH_6mm | SW10 |
| 1 | 4 | Button_Switch_THT:SW_PUSH_6mm | SW19 |
| 1 | 4075 | Package_DIP:DIP-14_W7.62mm | U7 |
| 1 | 5 | Button_Switch_THT:SW_PUSH_6mm | SW15 |
| 1 | 6 | Button_Switch_THT:SW_PUSH_6mm | SW11 |
| 1 | 7 | Button_Switch_THT:SW_PUSH_6mm | SW20 |
| 1 | 74HC04 | Package_DIP:DIP-14_W7.62mm | U3 |
| 1 | 74HC138 | Package_DIP:DIP-16_W7.62mm | U4 |
| 1 | 74HC373 | Package_DIP:DIP-20_W7.62mm | U10 |
| 1 | 74LS32 | Package_DIP:DIP-14_W7.62mm | U6 |
| 1 | 8 | Button_Switch_THT:SW_PUSH_6mm | SW16 |
| 1 | 9 | Button_Switch_THT:SW_PUSH_6mm | SW12 |
| 1 | ADVICE | Button_Switch_THT:SW_PUSH_6mm | SW6 |
| 1 | AMS1117-5.0 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal | CN0 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_15x7.5RM7.6 | BZ1 |
| 1 | C | Button_Switch_THT:SW_PUSH_6mm | SW13 |
| 1 | CR2032 | footprints:BatteryHolder_Keystone_1060_1x2032 | BT1 |
| 1 | CXK58257AP | Package_DIP:DIP-28_W15.24mm | U9 |
| 1 | Cart_connector | footprints:cart_connector | CN3 |
| 1 | D | footprints:D_DO-15_P30mm_Horizontal | D2 |
| 1 | DC | Button_Switch_THT:SW_PUSH_6mm | SW7 |
| 1 | DOWN | Button_Switch_THT:SW_PUSH_6mm | SW4 |
| 1 | Fuse | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | F1 |
| 1 | LCD_Connector | footprints:LCD_Connector | CN4 |
| 1 | LEFT | Button_Switch_THT:SW_PUSH_6mm | SW5 |
| 1 | M/B | Button_Switch_THT:SW_PUSH_6mm | SW8 |
| 1 | Mini-DIN-8 | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | CN2 |
| 1 | NS-102 | footprints:NS-102 | I1 |
| 1 | OK | Button_Switch_THT:SW_PUSH_6mm | SW9 |
| 1 | Q_NPN_BCE | Package_TO_SOT_THT:TO-92_Inline_Wide | Q9 |
| 1 | RIGHT | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | R_Network04_Split | Resistor_THT:R_Array_SIP5 | RN1 |
| 1 | R_Variable | Potentiometer_THT:Potentiometer_Bourns_3339P_Vertical | VR1 |
| 1 | Reset IC | Resistor_THT:R_Array_SIP5 | U2 |
| 1 | Resonator | Crystal:Resonator-3Pin_W6.0mm_H3.0mm | XT1 |
| 1 | SW_SPST | Button_Switch_THT:SW_E-Switch_EG1224_SPDT_Angled | SW1 |
| 1 | UP | Button_Switch_THT:SW_PUSH_6mm | SW3 |
| 1 | uPD78213 | footprints:qdip64 | U5 |
| 1 | ~ | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | CN5 |
| 1 | ~ | Diode_THT:D_DO-34_SOD68_P10.16mm_Horizontal | ZD1 |
| 1 | ~ | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Horizontal | CN1 |
Questions
How big is the Cb-1 PCB?
It measures 179.5 × 235.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cb-1 use?
128 parts, built around the 74HC04D, 74HC138, 74HC373D and 74LS32SC. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Cb-1 KiCad files?
From the jonathanperret/kh970-research repository on GitHub, at the commit this page was made from: the board is cb-1/cb-1.kicad_pcb and its schematic cb-1/cb-1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cb-1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask jonathanperret before reusing the design.
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