11 open source boards using the SN74HC74DR
Real designs built with the SN74HC74DR, 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.
AVR/ArduinoMSAP-2 rev.A
mehrantsi
240 × 1056 mm658 parts2LMIT13
ANUFS-BSPD-2026
chithigun23
75.5 × 62 mm115 parts4LNo license1
AVR/ArduinoMSAP-2 rev.A SMD
178 × 711 mm658 parts2LMIT13
AVR/ArduinoMSAP-2-production
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoMSAP-2-production routed
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoPre connector model normalization v1
300 × 248.8 mm520 parts6LMIT13
Raspberry PiDut power rev a
jackalkahwati
160 × 100 mm145 parts4LNo license0
AVR/ArduinoPre cpl coordinate fix v1
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoPre current source usb keepout repair v1
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoPre j5-model alignment route v1
300 × 248.8 mm520 parts6LMIT13
AVR/ArduinoMSAP-2-production source
300 × 248.8 mm375 parts6LMIT13
The SN74HC74DR in open source designs
The gallery holds 11 open source boards using the SN74HC74DR from 3 GitHub repositories; a typical one measures about 300 × 248.8 mm and carries around 520 components.
82% use four copper layers or more, and 82% carry an open source license.
The most starred is MSAP-2 rev.A SMD by mehrantsi.
Microcontrollers on boards using the SN74HC74DR
What boards using the SN74HC74DR are built for
SN74HC74DR: common questions
Where can I find a SN74HC74DR reference design?
Each of the 11 boards on this page is a real design using the SN74HC74DR. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the SN74HC74DR use?
Most are built on AVR/Arduino (9) and Raspberry Pi (1).
How big is a typical board using the SN74HC74DR?
The median is 300 × 248.8 mm, and 18% are two-layer designs.
What is the most popular open source board using the SN74HC74DR?
By GitHub stars, MSAP-2 rev.A SMD by mehrantsi, with 13 stars.
Can I simulate one of these boards using the SN74HC74DR before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.