45 open source boards using the 74HCT138
Real designs built with the 74HCT138, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
Z80ram
jblang
99.8 × 49.9 mm19 parts2LMIT73
Raspberry PiZoxnoxious Backplane and VCA
brer-rabbit
133.8 × 102.9 mm86 parts4LGPL-3.068
D register
TomNisbet
102 × 96 mm52 parts2LMIT18
Commodore VIC-20 32KB RAM Expansion
BrettHallen
63.9 × 61.6 mm12 parts2LNo license4
NQSAP-PCB Instruction Register and Ring Counter
102 × 96 mm52 parts2LMIT18
RC6502 VDU
tebl
99.1 × 99.7 mm37 parts2LGPL-3.0192
RC6502 RIOT
99.1 × 69.2 mm26 parts2LGPL-3.0192
NQSAP-PCB RAM and MAR
102 × 96 mm40 parts2LMIT18
AVR/ArduinoNQSAP Output Display
102 × 96 mm18 parts2LMIT18
Browse boards by part
AMS1117-3.3 1034USBLC6-2SC6 836RP2040 609W25Q128JVS 388TL072 309AP2112K-3.3 308TL074 274ESP32-S3-WROOM-1 266CH340C 242L7805 224Pico 21874HC595 213USBLC6-2P6 200LM358 19074LS04 175AP2112K-3.3TRG1 173ESP32-WROOM-32 167SRV05-4 165Arduino_Nano_v3.x 15974LS245 156LM7805_TO220 15574LS138 152W25Q128JVSIQ 15174LS32 148