Abex
About the Abex PCB
Abex is an open source PCB design by gianlucarenzi, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 143 × 162 mm, with 32 components from 17 distinct parts.
Other key parts include the TXB0108-PW and MCP1827S-1.5A-TO-220-3. By type, the board carries 9 capacitors, 6 ICs, 6 connectors, 4 resistors and 1 diode.
From the project
Atari 8-Bit Bus EXtender
Atari Bus EXtender for Atari XE Computers =====================================
This is a Atari PBI & ECI Bus extender, for adding expansion board with ease, called Atari Bus EXtender for Atari XE Computers or ABEX for short.
This project expand somehow the Atari 1090XL Bus Expansion in the early 80s but with a simple layout and using only 3.3v compliant electronics. No 5V is available on the bus, and all signals are converted to 3.3v level.
Main components on the Abex
Abex bill of materials (BOM)
32 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | TXB0108-PW | SSOP-20_4.4x6.5mm_Pitch0.65mm | U1, U3, U4, U5, U6 |
| 1 | MCP1827S-1.5A-TO-220-3 | MCP_1827S_TO-220-3_Horizontal_TabDown | U2 |
| 1 | ATARI-CARTRIDGE | TE_5530843-2_15X2_CART_EDGE_CONNECTOR | CART2 |
| 1 | ECIBUS | ECI_BUS_7X2_EDGE_CONNECTOR | ECI2 |
| 3 | 0877159106 | MOLEX_0877159106 | J1, J2, J3 |
| 1 | CONN_01X04 | Pin_Header_Angled_1x04 | P1 |
| 1 | ATARI-CARTRIDGE | ATARI-LEFT-CARTRIDGE | CART1 |
| 1 | ECIBUS | ATARI-XE-ECI-SLOT | ECI1 |
| 3 | TEST_1P | Pin_Header_Straight_1x01 | GND1, W1, W2 |
| 1 | TEST_1P | Pin_Header_Straight_1x01 | VCC_5V1 |
| 1 | LED GREEN | LED_1206 | D1 |
| 4 | 10U 10u | C_1206_HandSoldering | C1, C7, C8, C9 |
| 1 | 100N 100n | C_1206_HandSoldering | C2 |
| 1 | 22U 22u | TantalC_SizeA_EIA-3216_HandSoldering | C3 |
| 3 | 10U 10u | CP_Radial_D10.0mm_P2.50mm_3D | C4, C5, C6 |
| 1 | 1.5K | R_1210_HandSoldering | R1 |
| 3 | 0 | R_1210_HandSoldering | R2, R3, R4 |
Abex design files
The KiCad project lives in the gianlucarenzi/abex repository on GitHub; these links point at the commit this page was built from.
Abex: common questions
How big is the Abex PCB?
The Abex measures 143 × 162 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Abex?
32 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Abex design files?
From the gianlucarenzi/abex repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Abex design in my own project?
Yes, under the terms of its GPL-2.0 license, which gianlucarenzi chose for the repository.