SAP-Plus Instruction Register and Step Counter
About the SAP-Plus Instruction Register and Step Counter PCB
SAP-Plus Instruction Register and Step Counter 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 38 components from 32 distinct parts.
Other key parts include the 74LS04, 74LS161, 74LS138 and 74LS377. By type, the board carries 19 diodes, 5 ICs, 5 capacitors, 5 resistors and 4 connectors.
From the project
Simple As Possible (SAP) 8-bit computer with a modular PCB design
Add WRITE LED to Instruction Register Add N LED to Step Counter * Add Module Interconnect labels
Main components on the SAP-Plus Instruction Register and Step Counter
SAP-Plus Instruction Register and Step Counter bill of materials (BOM)
38 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS04 | DIP-14_W7.62mm | U1 |
| 1 | 74LS161 | DIP-16_W7.62mm | U2 |
| 1 | 74LS138 | DIP-16_W7.62mm | U3 |
| 2 | 74LS377 | DIP-20_W7.62mm | U4, U5 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 1 | to Microcode | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | to Microcode | PinHeader_1x08_P2.54mm_Vertical | J4 |
| 1 | IR0 | LED_D3.0mm | D1 |
| 1 | IR1 | LED_D3.0mm | D2 |
| 1 | IR2 | LED_D3.0mm | D3 |
| 1 | IR3 | LED_D3.0mm | D4 |
| 1 | IR4 | LED_D3.0mm | D5 |
| 1 | IR5 | LED_D3.0mm | D6 |
| 1 | FZ | LED_D3.0mm | D7 |
| 1 | FC | LED_D3.0mm | D8 |
| 1 | T-EXT | LED_D3.0mm | D9 |
| 1 | T0 | LED_D3.0mm | D10 |
| 1 | T1 | LED_D3.0mm | D11 |
| 1 | T2 | LED_D3.0mm | D12 |
| 1 | T3 | LED_D3.0mm | D13 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | T4 | LED_D3.0mm | D14 |
| 1 | T5 | LED_D3.0mm | D15 |
| 1 | T6 | LED_D3.0mm | D16 |
| 1 | T7 | LED_D3.0mm | D17 |
| 1 | WRITE | LED_D3.0mm | D18 |
| 1 | N | LED_D3.0mm | D19 |
| 5 | 0.1uF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C3, C4, C5 |
| 1 | R-RED | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | R-BLU | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | R-WHT | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | R-GRN | R_Array_SIP9 | RN1 |
| 1 | R-YEL | R_Array_SIP9 | RN2 |
SAP-Plus Instruction Register and Step Counter design files
The KiCad project lives in the TomNisbet/sap-plus repository on GitHub; these links point at the commit this page was built from.
SAP-Plus Instruction Register and Step Counter: common questions
How big is the SAP-Plus Instruction Register and Step Counter PCB?
The SAP-Plus Instruction Register and Step Counter measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SAP-Plus Instruction Register and Step Counter?
38 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the SAP-Plus Instruction Register and Step Counter design files?
From the TomNisbet/sap-plus repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SAP-Plus Instruction Register and Step Counter design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
More boards in sap-plus
SAP-Plus Memory Loader
150 × 100 mm57 parts2LMIT10
SAP-Plus Program Counter and Stack Pointer
102 × 96 mm50 parts2LMIT10
SAP-Plus A and B Registers
102 × 96 mm44 parts2LMIT10
SAP-Plus Microcode
102 × 96 mm40 parts2LMIT10
SAP-Plus Backplane
360 × 128 mm36 parts2LMIT10
SAP-Plus Output Register
102 × 96 mm36 parts2LMIT10
SAP-Plus ALU
102 × 96 mm35 parts2LMIT10
SAP-Plus RAM and MAR
102 × 96 mm35 parts2LMIT10
SAP-Plus System Clock
102 × 96 mm32 parts2LMIT10
AVR/ArduinoSAP-Plus Loader / Debugger
102 × 96 mm18 parts2LMIT10
SAP-Plus Memory Loader Interface
102 × 96 mm10 parts2LMIT10