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Retro clock tmct

tmct-web·retro-clock_tmct·KiCad/retro_clock.kicad_pcb

Retro clock tmct PCB layout, top view — open source board by tmct-web

About the Retro clock tmct PCB

Retro clock tmct is an open source PCB design by tmct-web, published on GitHub. It is a 2-layer board measuring 245 × 240 mm, with 255 components from 54 distinct parts.

Other key parts include the 74HC14, LM2940T-5.0, NJU7043, LM393 and K155ID1. By type, the board carries 100 capacitors, 58 ICs, 58 resistors, 11 diodes, 9 test points and 5 switches.

It belongs with the displays & leds and retro computing designs in this gallery.

From the project

All discrete logic clock

This is a clock made by combining only logic ICs, so-called DIP components, without using a microcontroller. KiCad project files are available.

You can find more information on the following page. (*Japanese only)

Retro clock tmct, from the project README
From the project README

Main components on the Retro clock tmct

74HC14LM2940T-5.0NJU7043LM393K155ID174HC3274HC0474HC0874HC28374HC15774HC27374HC54174HC2174HC161

Retro clock tmct bill of materials (BOM)

255 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
74HC14
IC1, IC4, IC6
1
LM2940T-5.0
IC2
1
NJU7043
IC3
1
LM393
NJU7043
IC5
4
K155ID1
IC7, IC8, IC9, IC10
6
74HC32
IC11, IC12, IC15, IC34, IC35, IC38
8
74HC04
IC13, IC27, IC28, IC29, IC45, IC53, IC54, IC55
8
74HC08
IC14, IC17, IC30, IC31, IC33, IC43, IC44, IC46
1
74HC283
IC16
6
74HC157
IC18, IC19, IC20, IC21, IC22, IC23
4
74HC273
IC24, IC25, IC26, IC39
1
74HC541
IC32
6
74HC21
IC36, IC37, IC42, IC56, IC57, IC58
8
74HC161
IC40, IC41, IC47, IC48, IC49, IC50, IC51, IC52
2
MPSA42
Q1, Q2
1
B3P-VH(LF)(SN)
CN1
2
XH_B4B-XH-A
CN2, CN4
1
XH_B8B-XH-A
CN3
1
GL5528
CDS1
3
Lamp_Neon
NE1, NE2, NE3
Show 34 more
QtyPartRefs
1
TLP222G-2
PC1
2
BOURNS_3296W/10K
10k
RV1, RV2
3
TVDT18-050CB-T
SW1, SW3, SW4
2
IS-2235-G
SW2, SW5
1
HP-612
T1
6
GND
TP18, TP19, TP20, TP21, TP22, TP26
1
CLK
TP23
1
RST
TP24
1
+5V
TP25
1
S1ZB
D1
4
BAT43
D2, D3, D9, D11
4
UF2010
D4, D5, D7, D8
1
GDZJ4.7C
D6
1
LED
D10
1
1500U/25V
1500u/25V
C1
64
0.1U/50V
0.1u/50V
C2, C8, C9, C10, C11, C12, C13, C14 +56
2
10U/400V
22u/400V
C3, C4
20
1U/50V
1u/50V
C5, C7, C30, C31, C32, C33, C36, C37 +12
1
100U/16V
100u/16V
C6
5
UnPop
C89, C90, C91, C92, C93
7
10U/25V
10u/25V
C94, C95, C96, C97, C98, C99, C100
5
10k/5%
R1, R16, R17, R36, R39
1
8.2k/5%
R2
8
4.7k/5%
R3, R5, R14, R20, R21, R22, R23, R24
1
6.8k/5%
R4
1
3.3k/5%
R6
6
100k/5%
R7, R12, R13, R15, R35, R38
1
1M/5%/0.5W
R8
8
1k/5%
R9, R10, R11, R25, R26, R27, R28, R29
2
330/5%
R18, R19
1
0
R30
8
68k/5%/0.5W
R31, R32, R33, R34, R52, R53, R54, R55
6
200k/5%/0.5W
R37, R40, R41, R56, R57, R58
10
33/5%
R42, R43, R44, R45, R46, R47, R48, R49 +2

Retro clock tmct design files

The KiCad project lives in the tmct-web/retro-clock_tmct repository on GitHub; these links point at the commit this page was built from.

Retro clock tmct: common questions

How big is the Retro clock tmct PCB?

The Retro clock tmct measures 245 × 240 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Retro clock tmct?

255 components, from 54 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Retro clock tmct design files?

From the tmct-web/retro-clock_tmct repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Retro clock tmct design in my own project?

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

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