
Interposer
AlexColello/discrete-nes
A discrete logic implementation of the Nintendo Entertainment System where EVERY single gate output and EVERY memory bit is visible via LED. Watch a complete NES flip every bit in real-time.

This is a version of the files from https://gigatron.io/ altered to work on a vanilla KiCAD 5.1.6. Changes are minimal in the schematic and PCB, layout has only been changed where dimensions or orientations changed as a…
Gigatron is an open-source printed circuit board by flypie, from the flypie/Gigatron repository on GitHub. It is a 2-layer board of 235 × 158.8 mm with 151 parts on 212 nets, routed with 4,153 tracks and 92 vias.
It is built around the 74HCT244D, 74HCT240D and 74HCT153D, with the 74HCT161D, 74HCT157D and 74HCT273D among its other parts. Its parts include 44 capacitors, 39 ICs, 36 diodes, 21 resistors and 4 connectors. It belongs with the computers and single-board computers boards of this library.
This is a version of the files from https://gigatron.io/ altered to work on a vanilla KiCAD 5.1.6. Changes are minimal in the schematic and PCB, layout has only been changed where dimensions or orientations changed as a result of symbol change.
The PCB has been routed with FreeRouter automatically. https://freerouting.org/
The Omega symbol has been removed as it broke the routing software.
No Copyright is claimed and rmeinas was the original creators of Gigatron.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | .1µ | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 +22 |
| 28 | 1N60P | Diode_THT:D_A-405_P2.54mm_Vertical_KathodeUp | D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25 +12 |
| 9 | 74HCT153 | Package_DIP:DIP-16_W7.62mm | U12, U17, U18, U19, U20, U21, U22, U23, U24 |
| 6 | 74HCT161 | Package_DIP:DIP-16_W7.62mm | U3, U4, U5, U6, U29, U30 |
| 5 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R6, R7, R10, R19 |
| 5 | LED | LED_THT:LED_D3.0mm | D2, D5, D6, D7, D8 |
| 4 | 74HCT157 | Package_DIP:DIP-16_W7.62mm | U32, U33, U34, U35 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5 | H1, H2, H3, H4 |
| 3 | 1k5 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11, R13, R15 |
| 3 | 4605X-101-222LF | Resistor_THT:R_Array_SIP5 | R4, R5, R8 |
| 3 | 47p | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C2, C3 |
| 3 | 74HCT273 | Package_DIP:DIP-20_W7.62mm | U8, U9, U38 |
| 3 | 74HCT377 | Package_DIP:DIP-20_W7.62mm | U27, U31, U37 |
| 3 | 750 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12, R14, R16 |
| 2 | 0.1µ | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C43, C44 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R100, R101 |
| 2 | 1N60P | Diode_THT:D_A-405_P7.62mm_Horizontal | D3, D4 |
| 2 | 68 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17, R18 |
| 2 | 74HCT138 | Package_DIP:DIP-16_W7.62mm | U13, U14 |
| 2 | 74HCT244 | Package_DIP:DIP-20_W7.62mm | U10, U28 |
| 2 | 74HCT283 | Package_DIP:DIP-16_W7.62mm | U25, U26 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 220µ | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C4 |
| 1 | 27C1024 | Package_DIP:DIP-40_W15.24mm | U7 |
| 1 | 5.6V/5W | Diode_THT:D_DO-15_P12.70mm_Horizontal | D1 |
| 1 | 54819-0519 | Connector_USB:USB_Micro-B_Wuerth_629105150521 | J1 |
| 1 | 6.25MHz/30pF | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 74HC595 | Package_DIP:DIP-16_W7.62mm | U39 |
| 1 | 74HCT04 | Package_DIP:DIP-14_W7.62mm | U1 |
| 1 | 74HCT139 | Package_DIP:DIP-16_W7.62mm | U11 |
| 1 | 74HCT240 | Package_DIP:DIP-20_W7.62mm | U15 |
| 1 | 74HCT32 | Package_DIP:DIP-14_W7.62mm | U16 |
| 1 | 750mA/180mohms/60V | Fuse:Fuse_Littelfuse_395Series | F1 |
| 1 | A15 | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | A15 |
| 1 | CONN-JACK-STEREO-R/A-3PIN-3.5MM | SamacSys_Parts_l:SJ13523N | J2 |
| 1 | DB15_FEMALE_HighDensity_MountingHoles | Connector_Dsub:DSUB-15-HD_Female_Horizontal_P2.29x1.98mm_EdgePinOffset3.03mm_Housed_MountingHolesOffset4.94mm | J3 |
| 1 | DB9_MALE_MountingHoles | Connector_Dsub:DSUB-9_Female_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset7.48mm | J4 |
| 1 | HM62256BLP-7 | Package_DIP:DIP-28_W15.24mm | U36 |
| 1 | MCP100-450DI | Package_TO_SOT_THT:TO-92L_Inline_Wide | U2 |
| 1 | R=10kohms | Resistor_THT:R_Array_SIP6 | R9 |
It measures 235 × 158.8 mm and has 2 copper layers, 1.6 mm thick.
151 parts, built around the 74HCT244D, 74HCT240D, 74HCT153D and 74HCT161D. 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.
From the flypie/Gigatron repository on GitHub, at the commit this page was made from: the board is Kicad/Gigatron.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask flypie before reusing the design.

AlexColello/discrete-nes
A discrete logic implementation of the Nintendo Entertainment System where EVERY single gate output and EVERY memory bit is visible via LED. Watch a complete NES flip every bit in real-time.


ksr/p8x
Generated by generators/genkicad.py from the canonical geneagle netlist (CARDS["peripheral-card"]), same standard as the memory card: 4-layer (F/B signals, In1=GND, In2=VCC planes), a bypass cap above each IC, a…




