2 layers203.2 × 149.9 mm
Boards using the 74HC21D
31 boardsBoards in 22 GitHub repositories, designed in KiCad, that use the 74HC21D by Nexperia (-40℃~+125℃ 1.5V~4.2V 1.9V、3.98V、4.4V、5.48V、5.9V 100mV、260mV、400mV 19ns@6V,50pF 2 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHS). See how each wires it, with its parts, size, README and files; the 74HC21D’s symbol, footprint and pinout are on its own page.
- 2 layers177.8 × 130.8 mm
- 2 layers208 × 175 mm
- 2 layers241.3 × 149.9 mm
- 2 layers102.5 × 75 mm
- 2 layers160 × 100 mm
- 2 layers58.9 × 66.5 mm
Neopixel punk main
astuder/neopixel-punk-console
Blinking RGB LEDs with 555s and a handful of 74-series logic
53 partsMIT - 2 layers180 × 67.5 mm
- 2 layers
- 2 layers87.5 × 48.3 mm
Isa memory expansion
ifilot/ibm5150-memory-expansion-256-640
Memory expansion ISA card for extending conventional memory from 256 to 640 KiB
9 parts - 2 layers80 × 100 mm
P2000t slot2-datacartridge
ifilot/p2000t-tape-monitor
P2000T cartridge software for reading out tapes and copying them to external rom chip
28 parts - 4 layers99.8 × 99.8 mm
- 2 layers
- 2 layers100 × 54.6 mm
- 2 layers196.9 × 66.7 mm
VideoRAM
slu4coder/Minimal-UART-Computer-1-2
Legacy: Version 1 and 2 of my TTL-only CPU featuring UART I/O, an expansion port, 512KB SSD at up to 10MHz clock speed
42 parts184 - 4 layers100 × 100 mm
- 2 layers100 × 57.6 mm
- 2 layers
- 2 layers177.8 × 130.8 mm
- 2 layers97.8 × 72.4 mm
- 2 layers
- 2 layers
- 2 layers106.7 × 83.8 mm
- 2 layers175.3 × 80.6 mm
SuS
stonedDiscord/Automatenplatinen
Reverse engineerte Hardware aus deutschen Spielautomaten.
88 parts5BSD-2-Clause