2 layers231.1 × 106.7 mm
2 layers47.2 × 53.3 mm
Antic switch
owen-rp2a03/atari_antic_switch1Atari 8-Bit Antic switch
- Size
- 47.2 × 53.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 57
- Pads
- 186
- Tracks, vias
- 589, 44
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 May 2026
- Updated
- 16 Oct 2026
Overview
Antic switch is an open-source printed circuit board by owen-rp2a03, from the owen-rp2a03/atari_antic_switch repository on GitHub, published under the MIT licence. It is a 2-layer board of 47.2 × 53.3 mm with 12 parts on 57 nets, routed with 589 tracks and 44 vias.
It is built around the 74LS245SC. Its parts include 4 ICs, 4 connectors and 2 resistors. It belongs with the retro computing and games boards of this library.
Main components
1README
README.mdAtari NTSC/PAL Antic switch board (Incomplete)
Theory - Uses two '245 transceivers and holds reset on either Antic to disable them; isolating the control signals may not be necessary but doing it just in case. Too many wires and two dip-40 chips for me to reliably test on cheap breadboards, so designed a theoretical circuit for a prototype pcb.
2026-5-17 - Untested prototype design
2026-5-28 - Boards recieved from PCBWay, confirmed not working, signal directions through bus tranciever need reworking due to my uncertainty of the i/o of the control lines for Antic.
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 74LS245 | Package_DIP:DIP-20_W7.62mm | U2, U4 |
| 2 | MountingHole_2.2mm_M2 | MountingHole:MountingHole_2.2mm_M2 | MH1, MH2 |
| 1 | 2.00m | Connector_JST:JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal | J2 |
| 1 | 2.54 | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Horizontal | J3 |
| 1 | 2.54m | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J1 |
| 1 | ANTIC_Conn | Package_DIP:DIP-40_W15.24mm | P1 |
| 1 | ANTIC_NTSC | Package_DIP:DIP-40_W15.24mm | U1 |
| 1 | ANTIC_PAL | Package_DIP:DIP-40_W15.24mm | U3 |
Questions
How big is the Antic switch PCB?
It measures 47.2 × 53.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Antic switch use?
12 parts, built around the 74LS245SC. 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 Antic switch KiCad files?
From the owen-rp2a03/atari_antic_switch repository on GitHub, at the commit this page was made from: the board is antic_switch.kicad_pcb and its schematic antic_switch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Antic switch design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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