Ab register
About the Ab register PCB
Ab register is an open source PCB design by TomNisbet, published on GitHub under the MIT license. It is a 2-layer board measuring 102 × 96 mm, with 60 components from 27 distinct parts.
Other key parts include the 74HCT377, 74HCT245 and 74HCT138. By type, the board carries 21 diodes, 21 resistors, 7 ICs, 7 capacitors and 4 connectors.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
NQSAP 8-bit computer PCB version
A multi-PCB version of the NQSAP 8-bit computer
Visit the NQSAP-PCB documentation pages for detailed design notes and schematics.
Main components on the Ab register
Ab register bill of materials (BOM)
60 components, 27 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 74HCT377 | DIP-20_W7.62mm | U1, U3 |
| 3 | 74HCT245 | DIP-20_W7.62mm | U2, U4, U7 |
| 2 | 74HCT138 | DIP-16_W7.62mm | U5, U6 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 2 | Conn_02x08 | PinHeader_2x08_P2.54mm_Vertical | J5, J6 |
| 1 | A0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | A1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | A2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | A3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | A4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | A5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6 |
| 1 | A6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7 |
| 1 | A7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D8 |
| 1 | B0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D9 |
| 1 | B1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 1 | B2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D11 |
| 1 | B3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D12 |
| 1 | B4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D13 |
| 1 | B5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D14 |
| 1 | B6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D15 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | B7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D16 |
| 2 | READ | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D17, D18 |
| 2 | WRITE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D19, D20 |
| 1 | SHIFT | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D21 |
| 7 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7 |
| 18 | R-RED | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 +10 |
| 3 | R-GN | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17, R18, R21 |
Ab register design files
The KiCad project lives in the TomNisbet/nqsap-pcb repository on GitHub; these links point at the commit this page was built from.
Ab register: common questions
How big is the Ab register PCB?
The Ab register measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ab register?
60 components, from 27 distinct parts. The full bill of materials is listed on this page.
Where can I download the Ab register design files?
From the TomNisbet/nqsap-pcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Ab register design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
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