JoypadController

ddraig68k·hardware·expansion/JoypadController/JoypadController.kicad_pcb

JoypadController PCB layout, top view — open source board by ddraig68k

About the JoypadController PCB

JoypadController is an open source PCB design by ddraig68k, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 30 components from 10 distinct parts.

Other key parts include the 74LS125, XC9536PC44 and 74LS574. By type, the board carries 14 inductors, 6 capacitors, 4 ICs, 3 resistors, 2 connectors and 1 diode.

From the project

Schematic and CAD files for my 68K based computer

This card provides two DB9 ports for connecting standard 3-button Sega Megadrive/Genesis joypads.

A Sega pad multiplexes its buttons across a handful of pins, switched by the SELECT line - reading Up/Down/Left/Right and its face buttons in two passes rather than needing a pin per button. Both the Left and Right lines being pulled low at the same time is how the host detects that a pad is actually connected to a port.

Main components on the JoypadController

74LS125 XC9536PC44 74LS574

JoypadController bill of materials (BOM)

30 components, 10 distinct parts.

Qty	Part	Footprint	Refs
1	74LS125	DIP-14_W7.62mm_Socket	U1
1	XC9536PC44	PLCC-44	U2
2	74LS574	DIP-20_W7.62mm_Socket	U3, U4
1	D68K_64PIN_BOARD	DIN41612_C_2x32_Male_Horizontal_THT	J1
1	JTAG	PinHeader_1x06_P2.54mm_Vertical	J2
1	LED	LED_D5.0mm	D1
14	1uH	L_Axial_L6.6mm_D2.7mm_P10.16mm_Horizontal_Vishay_IM-2	L1, L2, L3, L4, L5, L6, L7, L8 +6
6	100nF	C_Disc_D5.0mm_W2.5mm_P2.50mm	C1, C2, C3, C4, C5, C6
1	330R	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1
2	10K	R_Array_SIP9	RN1, RN2

JoypadController design files

The KiCad project lives in the ddraig68k/hardware repository on GitHub; these links point at the commit this page was built from.

JoypadController: common questions

How big is the JoypadController PCB?

The JoypadController measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the JoypadController?

30 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the JoypadController design files?

From the ddraig68k/hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the JoypadController design in my own project?

Yes, under the terms of its MIT license, which ddraig68k chose for the repository.

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