NQSAP-PCB Program Counter and Stack Pointer
TomNisbet·nqsap-pcb·NQSAP PCB schematics/pc-sp/pc-sp.kicad_pcb
About the NQSAP-PCB Program Counter and Stack Pointer
NQSAP-PCB Program Counter and Stack Pointer 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 65 components from 32 distinct parts.
Other key parts include the 74HCT245, 74HCT161, 74HCT193, 74HCT00 and 74HCT10. By type, the board carries 23 diodes, 23 resistors, 8 ICs, 8 capacitors and 3 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 NQSAP-PCB Program Counter and Stack Pointer
NQSAP-PCB Program Counter and Stack Pointer bill of materials (BOM)
65 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 74HCT245 | DIP-20_W7.62mm | U1, U4 |
| 2 | 74HCT161 | DIP-16_W7.62mm | U2, U3 |
| 2 | 74HCT193 | DIP-16_W7.62mm | U5, U6 |
| 1 | 74HCT00 | DIP-14_W7.62mm | U7 |
| 1 | 74HCT10 | DIP-14_W7.62mm | U8 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 1 | Conn_02x08 | PinHeader_1x08_P2.54mm_Vertical | J4 |
| 1 | PC0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | PC1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | PC2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | PC3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | PC4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | PC5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6 |
| 1 | PC6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7 |
| 1 | PC7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D8 |
| 1 | SP0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D9 |
| 1 | SP1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 1 | SP2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D11 |
| 1 | SP3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D12 |
| 1 | SP4 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D13 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SP5 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D14 |
| 1 | SP6 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D15 |
| 1 | SP7 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D16 |
| 2 | WRITE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D17, D19 |
| 2 | READ | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D18, D20 |
| 1 | DN | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D21 |
| 1 | SE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D22 |
| 1 | UP | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D23 |
| 8 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 |
| 18 | R-GRN | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 +10 |
| 2 | R-RED | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17, R19 |
| 3 | R-YEL | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21, R22, R23 |
NQSAP-PCB Program Counter and Stack Pointer 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.
NQSAP-PCB Program Counter and Stack Pointer: common questions
How big is the NQSAP-PCB Program Counter and Stack Pointer?
The NQSAP-PCB Program Counter and Stack Pointer measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the NQSAP-PCB Program Counter and Stack Pointer?
65 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the NQSAP-PCB Program Counter and Stack Pointer 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 NQSAP-PCB Program Counter and Stack Pointer design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
More boards in nqsap-pcb
Ab register
TomNisbet
102 × 96 mm60 parts2LMIT18Xy register
TomNisbet
102 × 96 mm60 parts2LMIT18Microcode
TomNisbet
102 × 96 mm59 parts2LMIT18D register
TomNisbet
102 × 96 mm52 parts2LMIT18NQSAP-PCB Instruction Register and Ring Counter
TomNisbet
102 × 96 mm52 parts2LMIT18Backplane
TomNisbet
360 × 128 mm42 parts2LMIT18AVR/Arduino
NQSAP Loader / Debugger and Clock
TomNisbet
102 × 96 mm42 parts2LMIT18Alu
TomNisbet
102 × 96 mm40 parts2LMIT18NQSAP-PCB RAM and MAR
TomNisbet
102 × 96 mm40 parts2LMIT18NQSAP-PCB Flags and Jump Control
TomNisbet
102 × 96 mm29 parts2LMIT18AVR/Arduino
NQSAP Output Display
TomNisbet
102 × 96 mm18 parts2LMIT18
Similar boards
88 Pin Vag Breakout
rusefi
142 × 58 mm91 parts2LGPL-3.01.2k134pin 7-967288-1
rusefi
139.7 × 73.7 mm38 parts2LGPL-3.01.2kBreakout 60pin EEC-IV
rusefi
139.7 × 62.2 mm15 parts2LGPL-3.01.2kBreakout 112pin Connector
rusefi
174 × 58 mm39 parts2LGPL-3.01.2kEecv breakout
rusefi
140.8 × 53.7 mm9 parts4LGPL-3.01.2kRj45 breakout
rene-dev
15.2 × 53.8 mm3 parts2LGPL-3.0979