# S-132 Bill of Materials (Draft)

# Main S-132 PCB (green)

# Surface Mount Device (SMD) components

Part	Quantity	PCB	Description
	1	ESP32-WROVER U1	ESP-32 WROVER Module
	1	NCP1117-33 U2	NCP1117-33 LDO Linear Regulator
	1	74CBTLV3257 U3	74CBTLV3257 SOIC-16 Quad 1-of-2 Multiplexer/Demultiplexer
	1	74HC00 U4	74HC00 SOIC-14 Quad NAND Gate

# Through Hole (THT) components

Part	Quantity	PCB	Description
	2	R1, R2	120 Ohm Resistor [Brown, Red, Black, Black, Brown] Only required if using the PS/2 keyboard
	2	R3, R4	2K Ohm Resistor [Red, Black, Black, Brown, Brown] Only required if using the PS/2 keyboard
	1	R5, R13	10K Ohm Resistor [Brown, Black, Black, Red, Brown]
	3	R6, R8, R10	806 Ohm Resistor [Grey, Black, Blue, Black, Brown]
	3	R7, R9, R11	402 Ohm Resistor [Yellow, Black, Red, Black, Brown.]
	1	R12	4.7K Ohm Resistor [Yellow, Violet, Black, Brown, Brown]
	1	R14	121 Ohm Resistor [Brown, Red, Brown, Black, Brown]
	1	R15	243 Ohm Resistor [Red, Yellow, Orange, Black, Brown]
	1	R16	487 Ohm Resistor [Yellow, Gray, Violet, Black, Brown]
	1	R17	976 Ohm Resistor [White, Violet, Blue, Black, Brown.]
	4	D1, D2, D3, D4	1N4148 Signal Diode Diodes have polarity, ie. they must be inserted the correct way around to function properly.
	1	C2	1 uF MLC (105) Capacitor
	7	C1, C6, C7, C8, C9, C10, C11	100 nF (104) MLC Capacitor
	2	C3, C12	100 uF Electrolytic Capacitor Electrolytic capacitors have polarity, ie. they must be inserted the correct way around to function properly. +VE to the Square Pad
	1	C4	22 uF Electrolytic Capacitor Electrolytic capacitors have polarity, ie. they must be inserted the correct way around to function properly. +VE to the Square Pad
	2	C5, C13	10 uF Electrolytic Capacitor Electrolytic capacitors have polarity, ie. they must be inserted the correct way around to function properly. +VE to the Square Pad
	1	Q1	S8050 NPN Transistor TO-92
	2	Prog, Reset	Tactile Push Button Switch SPST
	1	Bell	Buzzer 12.2mm dia. The Buzzer is polarized, ie. it must be inserted the correct way around to function. +VE to the Square Pad
	1	U5	74HC165 Shift Register 8-bit, parallel load
	1	U6	MCP3008 8 Channel 10-bit Analog-to-Digital Converter (ADC)
	1	U7	74HC138 3-to-8 line Decoder/Demultiplexer, inverting
	1	U8	74HC595 8-bit serial in/out Shift Register 3-State Outputs
	1	LM7805 U9	LM7805 +5V DC Linear Regulator

# Through Hole (THT) headers

Part	Quantity	PCB	Description
	1	JP1 5V Pwr	2 Pin Header - Horizontal
	1	FTDI Program	6 Pin Header - Vertical Cut from 20 Pin male header
	1	Keyboard	6 Pin Header - Vertical Cut from 20 Pin male header. Only required if using the USB-HID keyboard
	1	Patch	8 Pin Header (4x2)- Vertical See notes for use of this header
	1	S-132	16 Pin Header (8x2)- Female, Vertical Fit to the underside of the PCB - attaches to the IMSAI8080/Cromemco Z-1
	1	KB Reset	2 Pin Header - Vertical Cut from 20 Pin male header. Only required if using the USB-HID keyboard
	4	For JP1 & Patch as required	Header Pin Shunts
	1	D+7AIO	Connector 20x2 Female Sits between the DIP-16 IC sockets. This connector forms a 40-pin socket for the D+7AIO

# Through Hole (THT) connectors

Part	Quantity	PCB	Description
	1	VGA	DB15 VGA Female Socket - Right Angled
	1	PS/2	Mini-DIN-6 PS/2 Keyboard Female Socket - Right Angled Only required if using the PS/2 keyboard
	1	Power	6.2mm DC Barrel Jack Connector
	4	(U4, U6, U7, U8)	16 pin DIP Socket One for each IC - U4, U6, U7, U8

# Printed Circuit Board (PCB)

Part	Quantity	Description
	1	USB-HID Keyboard Interface If ordered
	1	Front view

# Mounting hardware

Part	Quantity	Description
	1	M4x10mm Hex Socket Screw The M4 socket screw is used to fix the S-132 to the clear acrylic back of the IMSAI80080/Cromemco Z-1. You will need to tap or drill a hole to secure the M4 socket screw.
	1	M4 Hex Nut Nylon The nut can be used as a spacer between the S-132 PCB and the acrylic back of the IMSAI80080/Cromemco Z-1
	1	M3x5mm Zinc Machine Screw & Washer The M3 machine screw, washer and nut are used to secure the LM7805 to the S-132 PCB, to aide thermal conduction with the PCB.
	1

# Joystick Adapter (yellow)

Part	Quantity	PCB	Description
	1	Pin 1	40 Pin Header (20x2)- Horizontal Fit to underside of PCB.
	2	Pad 1, Pad 2	8 Pin Header (4x2)- Horizontal Fit to top of PCB.
	8	R100 - 107	10K Ohm Resistor [Brown, Black, Orange, Gold]
	1	A.Gnd	2 Pin Header - Vertical Cut from 20 Pin male header
	1	Ref.Voltage	3 Pin Header - Vertical Cut from 20 Pin male header
	1	Audio Patch	3 Pin Header - Vertical Cut from 20 Pin male header
	1	Amp	3 Pin Header - Vertical Cut from 20 Pin male header
	4	For A.Gnd, Ref.Voltage & Audio Patch as required	Header Pin Shunts Fit a shunt to both A.Gnd and the +5V & Center pins of Ref.Voltage
NOT SUPPLIED NOT REQUIRED	1	C100	100 nF (104) MLC Capacitor
NOT SUPPLIED NOT REQUIRED	1	C101	1 uF (105) MLC Capacitor
NOT SUPPLIED NOT REQUIRED	1	MCP1541	MCP1541 4.096V Voltage Reference

Part	Quantity	Description
	2 x 36 inch	8-core IDC Ribbon Cable Connects JS-1 Joysticks to the Joystick Adapter
	4	8-pin IDC Ribbon Cable Header - Female Connects JS-1 Joysticks to the Joystick Adapter
	1	Front view

# JS-1 Analog Joystick (yellow x 2)

Part	Quantity	PCB	Description
	4 each	SW1 - 4	Tactile Push Button Switch SPST
	1 each		2-axis Analog Joystick - 10Kohm
	1 each		8 Pin Header (4x2)- Horizontal Fit to top of PCB.

Part	Quantity	Description
	2	Front view

# Parallel Printer (red)

Part	Quantity	PCB	Description
	1	Pin 1	40 Pin Header (20x2)- Horizontal Fit to underside of PCB.
	1	Printer	DB25 Female Socket - Solder lug

Part	Quantity	Description
	1*	Front view

# Prototype Adapter (green)

Part	Quantity	PCB	Description
	1	Pin 1	40 Pin Header (20x2)- Horizontal Fit to underside of PCB.

Part	Quantity	Description
	1*	Front view