SAP-Plus A and B Registers

TomNisbet·sap-plus·schematics/ab-register/ab-register.kicad_pcb

SAP-Plus A and B Registers PCB layout, top view — open source board by TomNisbet

About the SAP-Plus A and B Registers PCB

SAP-Plus A and B Registers 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 44 components from 29 distinct parts.

Other key parts include the 74LS377, 74LS245 and 74LS86. By type, the board carries 21 diodes, 7 resistors, 6 ICs, 6 capacitors and 4 connectors.

From the project

Simple As Possible (SAP) 8-bit computer with a modular PCB design

Fix polarity of BI LED Add module interconnect labels * Add BI text box

Main components on the SAP-Plus A and B Registers

74LS377 74LS245 74LS86

SAP-Plus A and B Registers bill of materials (BOM)

44 components, 29 distinct parts.

Qty	Part	Footprint	Refs
2	74LS377	DIP-20_W7.62mm	U1, U3
2	74LS245	DIP-20_W7.62mm	U2, U4
2	74LS86	DIP-14_W7.62mm	U5, U6
2	Bus	PinHeader_1x40_P2.54mm_Vertical	J1, J2
2	to ALU	PinHeader_1x08_P2.54mm_Vertical	J5, J6
1	A0	LED_D3.0mm	D1
1	A1	LED_D3.0mm	D2
1	A2	LED_D3.0mm	D3
1	A3	LED_D3.0mm	D4
1	A4	LED_D3.0mm	D5
1	A5	LED_D3.0mm	D6
1	A6	LED_D3.0mm	D7
1	A7	LED_D3.0mm	D8
1	B0	LED_D3.0mm	D9
1	B1	LED_D3.0mm	D10
1	B2	LED_D3.0mm	D11
1	B3	LED_D3.0mm	D12
1	B4	LED_D3.0mm	D13
1	B5	LED_D3.0mm	D14
1	B6	LED_D3.0mm	D15

Show 9 more

Qty	Part	Footprint	Refs
1	B7	LED_D3.0mm	D16
2	READ	LED_D3.0mm	D17, D18
2	WRITE	LED_D3.0mm	D19, D20
1	BI	LED_D3.0mm	D21
6	0.1uF	C_Disc_D3.0mm_W1.6mm_P2.50mm	C1, C2, C3, C4, C5, C6
1	R-BLU	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1
2	R-GN	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R17, R18
2	R-RED	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R19, R20
2	R_RED	R_Array_SIP9	RN1, RN2

SAP-Plus A and B Registers 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.

Layoutschematics/ab-register/ab-register.kicad_pcb
Schematicschematics/ab-register/ab-register.kicad_sch

SAP-Plus A and B Registers: common questions

How big is the SAP-Plus A and B Registers PCB?

The SAP-Plus A and B Registers measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SAP-Plus A and B Registers?

44 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the SAP-Plus A and B Registers 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 A and B Registers design in my own project?

Yes, under the terms of its MIT license, which TomNisbet chose for the repository.

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