HardLabs

74HController

Greentalinjo·74HController·kicad/logic-macropad.kicad_pcb

74HController PCB layout, top view — open source board by Greentalinjo

About the 74HController PCB

74HController is an open source PCB design by Greentalinjo, published on GitHub. It is a 6-layer board measuring 150 × 60 mm, with 137 components from 50 distinct parts.

Other key parts include the 74HC4060D, 74HC14D, 74HC161D, 74HC151D and 74HC259D. By type, the board carries 35 capacitors, 34 resistors, 30 diodes, 18 ICs, 9 jumpers and 6 switches.

It belongs with the keyboards designs in this gallery.

From the project

A game controller built entirely from discrete 74HC logic - no microcontroller, a diode ROM and an 8-N-1 serial frame out of an RJ45 console port.

A game controller built entirely from discrete 74HC logic. Eight keys, a diode ROM for a character table, and a real 8-N-1 serial frame out of an RJ45 console port — no microcontroller, no FPGA, no firmware, nothing programmable anywhere on the board.

This project started as an idea for a novel, old-school game controller to plug into a MikroTik RB4011 that I own and am turning into a gaming console. The RB4011 already has what a console needs to hear a controller — a serial console port on an RJ45 jack — so the controller only has to do one thing: turn a button press into a character on…

74HController, from the project README
From the project README

Main components on the 74HController

74HC4060D74HC14D74HC161D74HC151D74HC259D74HC86D74HC74D74HC138D74HC08D74HC32D74HC238D74HC165DMAX3232CSE+ME2108A33M3G

74HController bill of materials (BOM)

137 components, 50 distinct parts.

QtyPartRefs
1
74HC4060D
74HC4060
U1
2
74HC14D
74HC14
U2, U3
2
74HC161D
74HC161
U4, U10
2
74HC151D
74HC151
U5, U7
1
74HC259D
74HC259
U6
1
74HC86D
74HC86
U8
1
74HC74D
74HC74
U9
1
74HC138D
74HC138
U11
1
74HC08D
74HC08
U12
1
74HC32D
74HC32
U13
1
74HC238D
74HC238
U14
2
74HC165D
74HC165
U15, U16
1
MAX3232CSE+
MAX3232
U17
1
ME2108A33M3G
ME2108A33
U18
1
ABLS-3.6864MHZ-B4-T
3.6864MHz
Y1
1
HC-RJ45-5JA-1-4
CONSOLE
J2
1
2.54-1*40P
TTL UART
J3
1
BH-AA-A1AJ020
1x AA
BT1
1
2.54-1*40P
PWR SEL
JP1
1
2.54-2*7P
BAUD SEL
JP2
Show 30 more
QtyPartRefs
1
2.54-1*40P
BREAK EN
JP3
1
2.54-1*40P
OUT MODE
JP4
1
BOTH
JP5
1
2.54-1*40P
TX ROUTE
JP6
1
2.54-1*40P
RX ROUTE
JP7
1
DSR
JP8
1
CTS
JP9
1
NavPad5
SW1
1
MX6
SW6
1
MX7
SW7
1
MX8
SW8
1
K2-1102DP-F4SW-04
RESET
SW9
1
ST-0-102-A01-T000-LF
POWER
SW10
1
PWR
D1
28
1N4148WT-7
1N4148
D2, D200, D202, D203, D210, D213, D220, D221 +20
1
1N5817
D3
1
33u
L1
1
UVR1C101MED
100u/16V
C1
22
GRM155R71H104KE14D
100n
C2, C10, C11, C12, C13, C14, C15, C16 +14
2
CC0402JRNPO9BN300
30p
C3, C4
9
GRM21BR71H105KA12L
1u
C5, C30, C31, C32, C33, C34, C35, C36 +1
1
10u
C6
1
4k7
R3
1
1M
R4
11
1k
R5, R11, R13, R15, R17, R19, R21, R23 +3
1
100k
R6
1
100R
R7
11
10k
R8, R10, R12, R14, R16, R18, R20, R22 +3
7
15k
R30, R31, R32, R33, R34, R35, R36
1
2k2
R53

74HController design files

The KiCad project lives in the Greentalinjo/74HController repository on GitHub; these links point at the commit this page was built from.

74HController: common questions

How big is the 74HController PCB?

The 74HController measures 150 × 60 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the 74HController?

137 components, from 50 distinct parts. The full bill of materials is listed on this page.

Where can I download the 74HController design files?

From the Greentalinjo/74HController repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 74HController design in my own project?

The repository has no license, so all rights stay with Greentalinjo. Use it as a reference, and ask the author before reusing the design.

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