D register
About the D register PCB
D 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 52 components from 28 distinct parts.
Other key parts include the 74HCT377, 74HCT245, 74LS283 and 74HCT138. By type, the board carries 18 diodes, 18 resistors, 6 ICs, 6 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 D register
D register bill of materials (BOM)
52 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT377 | DIP-20_W7.62mm | U1 |
| 1 | 74HCT245 | DIP-20_W7.62mm | U2 |
| 2 | 74LS283 | DIP-16_W7.62mm | U3, U4 |
| 2 | 74HCT138 | DIP-16_W7.62mm | U5, U6 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Conn_01x08 | PinHeader_1x08_P2.54mm_Vertical | J6 |
| 1 | DQ0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | DQ1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | DQ2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | DQ3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | DQ4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | DQ5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6 |
| 1 | DQ6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7 |
| 1 | DQ7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D8 |
| 1 | AS0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D9 |
| 1 | AS1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 1 | AS2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D11 |
| 1 | AS3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D12 |
| 1 | AS4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D13 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AS5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D14 |
| 1 | AS6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D15 |
| 1 | AS7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D16 |
| 1 | READ | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D17 |
| 1 | WRITE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D18 |
| 6 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6 |
| 9 | R-RED | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 +1 |
| 9 | R-GN | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10, R11, R12, R13, R14, R15, R16 +1 |
D 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.
D register: common questions
How big is the D register PCB?
The D register measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the D register?
52 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the D 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 D register design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
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